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Journal articles on the topic 'Dyes and dyeing Textile fibers'
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1
Serra, Albert, Quim Tarrés, Miquel Llop, Rafel Reixach, Pere Mutjé, and Francesc X. Espinach. "Recycling dyed cotton textile byproduct fibers as polypropylene reinforcement." Textile Research Journal 89, no. 11 (July 11, 2018): 2113–25. http://dx.doi.org/10.1177/0040517518786278.
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The textile industry generates a large amount of byproducts that must be treated before being recycled or disposed of. The treatments to extract the dyeing agents are mandatory, and involve costs and interaction with toxic reagents. A relevant amount of such byproducts are short cotton dyed fibers. Cotton fibers are high-quality cellulosic fibers and can be used as composite reinforcement. In this paper, dyed cotton fibers were used to formulate, obtain and tensile test composite materials. The impact of the presence of dyes was studied and such dyes enhanced the interphase between the matrix and the reinforcement. On the other hand, when a coupling agent was incorporated to the formulation of the composites, the dyes hindered the chemical interactions between the maleic acid and the OH groups of the cellulosic fibers. Nonetheless, the composite materials showed competitive mechanical properties that were better than other natural fiber-reinforced composites and comparable to some glass fiber-based ones. Dyed cotton fibers can be used as reinforcement without further treatment, increasing the value chain of the textile industry and decreasing the chemical treatments necessary to recycle or dispose of dyed textile fibers.
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Xu, Su Xin, Jian Gang Chen, Lu Yi Chen, Bi Jia Wang, and Yi Qi Yang. "Sorption Thermodynamic and Kinetic Study of Polylactic Acid Fibers with Disperse Dyes in Non-Aqueous Medium." Key Engineering Materials 671 (November 2015): 121–32. http://dx.doi.org/10.4028/www.scientific.net/kem.671.121.
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The sorption thermodynamics and kinetics of disperse dyes on polylactic acid (PLA) fibers were investigated. PLA is crucial for a sustainable textile industry. However, the low dye exhaustion limits the textile application of PLA fibers. The basic dyeing parameters have been determined to provide an in-depth understanding of dyeing behavior. The weak sorption affinities were attributed to the weak dye-fiber interaction and favorable chemical potential of dyes in solvent. Enthalpy–entropy compensation effect also played a role in weak sorption. The interplay of dye structure and enthalpy, entropy changes was rationalized using molecular surface area and rotatable bonds. The conformation constraint strategy was proposed to overcome weak sorption affinity problem by lowering the entropy penalty. Temperature dependence of diffusion coefficients was well reproduced using molecular collision based diffusion model. The activation energies of diffusion have been correlated with molecular volumes of dyes.
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Ma, Xiaofei, Yujuan Wei, Shuo Wang, Xin Zuo, and Baolei Shen. "Sustainable ultrasound-assisted ultralow liquor ratio dyeing of cotton fabric with natural turmeric dye." Textile Research Journal 90, no. 5-6 (October 1, 2019): 685–94. http://dx.doi.org/10.1177/0040517519878793.
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Natural dyes are environmentally friendly and have become important alternatives to synthetic dyes in some dyeing products. Therefore, better extraction and dyeing techniques need to be developed for the dyeing process of natural dyes. In this work, cotton fabric was dyed using turmeric extraction solution under an ultralow liquor ratio (materials to liquor ratio of 1:5) and ultrasonic-assisted conditions. Dye extraction using different dispersants and pH values has been investigated and three-factor-three–level Box–Behnken design was employed to explore the dyeing conditions. It was found that sodium dodecyl sulfate systems and ultrasonic waves can effective improve the dyeing depth under neutral condition. The K/ S value can reach 2.53 with ultrasonic power of 200 W, dyeing time of 30 min and temperature of 40℃. Scanning electron microscope images showed that the application of ultrasound did not cause obvious fiber damage. The developed technique could be used in the textile industry to make dyeing cotton fibers with natural dyes more sustainable than it is at present.
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Zhang, ZH, ZQ Xu, XX Huang, and XM Tao. "Dyeing processes of 100% bio-based and degradable polylactide/poly (hydroxybutyrate-co-hydroxyvalerate) textiles." Textile Research Journal 87, no. 17 (August 9, 2016): 2066–75. http://dx.doi.org/10.1177/0040517516663158.
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This paper reports an investigation of dyeing processes of textiles made from a novel 100% bio-based and fully degradable polylactide/poly (hydroxybutyrate-co-hydroxyvalerate) (PLA/PHBV) fiber. The dye exhaustion, depth of shade and fastness, as well as bursting strength of dyed PLA/PHBV fabrics have been evaluated in terms of types and concentration of dyestuff, dyeing bath temperature, duration, liquor ratio and pH value. Finally, the energy cost of the whole dyeing process of the proposed material is calculated and compared with that of polyethylene terephthalate. The experimental results show that an excellent dyeing effect and bursting strength can be achieved by properly applied dyes (e.g. C.I. Disperse Orange 30, Red 74, and Blue 79) under optimal low-dyeing-temperature conditions (100℃, 10 min, pH 5, LR 30:1). In addition, considering the low energy cost during the whole process, PLA/PHBV fibers can be regarded as a promising and environment-friendly material for the textile industry.
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Liu, Kai Qiang, Yan Lian Rui, and Guo Qiang Chen. "Dyeing of Silk/PLA Mixture with Reactive Dyes." Advanced Materials Research 239-242 (May 2011): 1739–42. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.1739.
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Silk/PLA mixture is a new textile material, and it combines the outstanding characteristics of silk and PLA fibers. During the wet process, this mixture is subjected to some problems owing to the poor resistance of PLA fiber to alkali. The silk component in this mixture can be dyed with acid dyes under acidic condition, and with reactive dyes under alkaline condition. In the present work, silk/PLA mixture was dyed with Everzol ED reactive dyes in the case of the use of sodium carbonate and sodium bicarbonate as alkalis for the fixation of dyes. The alkali dosage and dyeing temperature on the uptake of dyes by this mixture were discussed. Also, the dyeing rates, building-up properties and color fastness of reactive dyes were determined. It was found that Everzol ED reactive dyes exhibited good dyeing properties for silk/PLA mixture under weakly alkaline condition in the presence of sodium bicarbonate.
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Dixit, Bharat C., Hitendra M. Patel, Dhirubhai J. Desai, and Ritu B. Dixit. "Studies on Dyeing Performance of Novel Acid Azo Dyes and Mordent Acid Azo Dyes Based on 2,4-Dihydroxybenzophenone." E-Journal of Chemistry 6, no. 2 (2009): 315–22. http://dx.doi.org/10.1155/2009/393498.
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Novel acid azo and mordent acid azo dyes have been prepared by the coupling of diazo solution of different aminonaphthol sulphonic acids and aromatic amino acids with 2,4-dihydroxybenzophenone. The resultant dyes were characterized by elemental analysis as well as IR and1H NMR spectral studies. The UV-visible spectral data have also been discussed in terms of structure property relationship. The dyeing assessments of all the dyes were evaluated on wool and silk textile fibers. The dyeing of chrome pretreated wool and silk have also been monitored. The result shows that better hue was obtained on mordented fiber. Results of bactericidal studies of chrome pretreated fibers revealed that the toxicity of mordented dyes against bacteria is fairly good. Dyeing on wool and silk fibers resulted in yellowish pink to reddish brown colourations having excellent light fastness and washing fastness.
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Budeanu, Ramona, Antonela Curteza, and Cezar Doru Radu. "Experimental Researches Regarding the Ecological Dyeing with Natural Extracts." Autex Research Journal 14, no. 4 (December 1, 2014): 290–98. http://dx.doi.org/10.2478/aut-2014-0029.
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Abstract The concept of ‘environmental awareness’ has recently had a major impact on the textile industry and on the fashion world as well. In this context, the use of natural fibres and the development of natural dyeing processes gradually became important goals of the textile industry. Of all natural textile fibres, hemp is considered to be one of the strongest and most durable. A wide range of natural extracts have been used for natural textile coloration and dyeing. Dyes deriving from natural sources have emerged as an important alternative to synthetic dyes. Ecofriendly, nontoxic, sustainable and renewable natural dyes and pigments have been used for colouring the food substrate, leather, wood, natural fibres and fabrics from the dawn of human history. The purpose of the research is to obtain ecologically coloured fabrics for textiles by using a method of dyeing that relies on natural ingredients extracted from red beet, onion leaves and black tea. The experiments are conducted on three different types of hemp fabrics. This paper presents the results of the studies regarding the dyeing process of hemp fabrics with natural extracts, the colours of the dyed samples inspected with reflectance spectra and the CIE L*a*b* colour space measurements.
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Simion Beldean-Galea, Mihail, Florina-Maria Copaciu, and Maria-Virginia Coman. "Chromatographic Analysis of Textile Dyes." Journal of AOAC INTERNATIONAL 101, no. 5 (September 1, 2018): 1353–70. http://dx.doi.org/10.5740/jaoacint.18-0066.
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Abstract The textile industry uses many raw materials (natural and synthetic dyes and fibers) and different dyeing techniques that can be considered important pollutants with a negative impact on the environment (toxic working conditions, discharged wastewater, and contamination). Although synthetic dyes are intensively used, offer a wide range of colors and hues and properties of adhesion, longevity, and resistance to sunshine and chemical processes, and are cost-effective, they have begun to be restricted by many textile producers because they are nonbiodegradable and have toxic, carcinogenic, and mutagenic effects that generate some imbalances in plant, animal, and human life. Natural dyes of plant and animal origin exhibit very good tolerance to washing, rubbing, and light and are biodegradable and nontoxic; these properties have led to a call for the renewed use of these dyes. Modern analytical techniques (solid-phase extraction, spectrophotometry, HPLC, HPTLC, capillary electrophoresis) with different spectroscopy (UV-Vis, diode-array detection, pulsed amperometric detection) and/or MS/tandem mass spectrometry detectors have an important role in the textile industry in obtaining essential information about dyeing techniques, material origin, historical trade routes of ancient textiles, and environmental pollution. For this purpose, isolation, separation, and quantification methods of natural and synthetic textile dyes from various matrices (ancient and modern fabrics, water, biota, etc.) are presented.
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Manicketh, Tintu Jose, and Mannancheril Sebastian Francis. "Extraction of natural colorants from Araucaria columnaris, Macaranga peltata and Averrhoa bilimbi for textile coloration." International Journal of Clothing Science and Technology 32, no. 6 (May 5, 2020): 789–801. http://dx.doi.org/10.1108/ijcst-06-2019-0075.
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PurposeThe paper aims to investigate the feasibility of developing natural dyes from the barks of Araucaria columnaris and leaves of Macaranga peltata, Averrhoa bilimbi. The paper also deals with the application of natural dyes in textile coloration.Design/methodology/approachDye extraction was carried out using the aqueous method. The dyeability of the aqueous extract was assessed on cotton, silk and polyester yarns using different mordants (alum, acetic acid, CuSO4, lemon juice) and without mordant. UV–Visible spectral analysis and pH of different natural dyes were determined. Percent absorption, K/S values, CIELab values and fastness properties of the selected dyed yarns were also assessed.FindingsThe percentage values for dye exhaustion differed with various mordants. The K/S values were found to be influenced by the addition of mordants. Different hues were obtained with the usage of different mordants. Fastness results exhibited good to very good grades.Research limitations/implicationsThe effective application of aqueous method of dye extraction in the study avoids solvent toxicity. The current results proved that the dyeing could be achieved at room temperature for different yarns (cotton, silk, polyester). At present, no report exists in the literature of research work on the extraction of natural dyes from the leaves of M. peltata, A. bilimbi and their dyeing potential on cotton, silk and polyester.Practical implicationsThe present work offers new environment-friendly dye as well as simple dyeing method. Barks and leaves are promising sources of dye. Enormous availability of barks and leaves avoids the exploitation of the plant parts for the extraction of natural dyes.Originality/valueThe important feature of this study was the effective dyeing of natural and synthetic fibers at room temperature. The novel sources of natural dyes would contribute significantly to the existing knowledge of dyeing, and the natural dyes reduce the environmental impact of synthetic dyes.
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Cleve, E., E. Bach, U. Denter, H. Duffner, and E. Schollmeyer. "New Mathematical Model for Determining Time-Dependent Adsorption and Diffusion of Dyes into Fibers through Dye Sorption Curves in Combination Shades." Textile Research Journal 67, no. 10 (October 1997): 701–6. http://dx.doi.org/10.1177/004051759706701001.
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Dye uptake of textile substrates can be described as time-dependent by a new mathematical model, in which the sorption process is divided into fast and slow subprocesses. The fast subprocess describes the adsorption of the dye onto the fiber surface, and the slow one details the diffusion of the dye into the fiber. In addition, dye desorption is simultaneously considered along with adsorption. Relating this concept to the dyeing process, it is possible to divide the process into two parts—dye adsorption and diffusion. The model is verified by dyeing cotton with direct dyes, but the results are also transferable to other fibers and dye classes. Using this model, optimum dyeing parameters and dye combinations can be determined from the sorption curves, which are easily obtained by UV-VIS spectrophotometry.
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Gabardo, Rafaela Stefanie, Dayane Samara de Carvalho Cotre, Manuel José Lis Arias, Murilo Pereira Moisés, Bruna Thaisa Martins Ferreira, Rafael Block Samulewski, Juan P. Hinestroza, and Fabricio Maestá Bezerra. "Surface Modification of Polyester Fabrics by Ozone and Its Effect on Coloration Using Disperse Dyes." Materials 14, no. 13 (June 23, 2021): 3492. http://dx.doi.org/10.3390/ma14133492.
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Polyester fibers (PES) are the most consumed textile fibers due to their low water absorption; non-ionic character and high crystallinity. However, due to their chemical structure, the chemical interactions between polyester, finishing products, and dyes are quite challenging. We report on the use of ozone to modify the surface of polyester fibers with the goal of improving the interaction of the modified surface with finishing compounds and dyes. We used C.I. Disperse Yellow 211 to dye ozone-treated polyester fabrics and evaluated the effects of ozone treatment using FTIR-ATR, Raman spectroscopy, SEM imaging, rubbing tests, and capillarity measurements. We evaluated the dyeing performance via color analysis, and determined the dyeing kinetics. Experimental results indicate that the modification of polyester fabrics with ozone is a feasible pre-treatment that improves dyeing efficiency allowing better solidity of color and a decrease in the amount of dye required.
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Huong, Bui Mai. "APPLYING BI–FUNCTIONAL DYEING AND UV PROTECTION ON PROTEIN TEXTILE MATERIALS WITH WASTE FROM USED TEABAGS AND MANGOSTEEN HULLS." Vietnam Journal of Science and Technology 55, no. 1B (March 23, 2018): 91. http://dx.doi.org/10.15625/2525-2518/55/1b/12096.
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This paper presents the connection among three factors of the eco–friendly approach and products: natural textile materials, natural dyes and utilization of waste. The silk and wool materials were chosen as they are both protein fibers that have natural dyes affinity. The dyes were extracted from wastes (mangosteen hulls and used tea–bags) with optimal conditions found during our experiments: 80 °C for 120 min with a 15 % w/v citric acid solution in a 1:10 ratio of mangosteen flakes to solvent and 100 °C for 60 min in a 1:20 ratio of spent tea powder to solvent. The silk dyeing and wool dyeing were carried out at separately proper temperature, time and concentrations. The effect on dyeing of mordant types with different salt–metals mordanting methods and mordant techniques – pre–mordanting, simultaneous mordanting and post–mordanting were undertaken. The K/S values were used for determining the fixation of dyes on textile materials as it reflects the surface luster shade of the dyeing products. The results helped to estimate the influence of dyeing processes on protein materials where low temperature (< 90 °C) and post–mordanting methods exhibited good effects. The UPF values above 29 measured on dye fabric proved the excellent UV protection, even with non–mordant dyeing.
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Boylston, Eileen K., Jeanette M. Cardamone, Bruce F. Ingber, and Trisha Rice. "Microscopical Investigation of Cotton Chemically Modified to Accept Wool Dyes for Wool/Cotton Blend Textiles." Microscopy and Microanalysis 6, S2 (August 2000): 490–91. http://dx.doi.org/10.1017/s1431927600034942.
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Renewed interest in textile blends of wool and cotton has led to developments in union dyeing (same shade on both wool and cotton fibers) that has potential for increased markets for both fibers as trans-seasonal apparel. The difficulty of efficiently dyeing wool and cotton to the same shade has limited the availability of yarns and fabrics containing blends of both fibers. In fabrics containing blends of cellulosic cotton and proteinaceous wool, it is generally necessary to employ more than one class of dyes and the process involves several steps with adjustments of pH and temperature. The ARS process provides maximum effectiveness and efficiency for one-step union dyeing. It requires pretreatment before dyeing to impart cationic character to cellulosic cotton so that it can compete with protonated wool for a common anionic dye. Three pre-treatments have been applied.
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Oliveira, Fernando R., A. P. Souto, Noemi Carneiro, and J. H. O. Nascimento. "Surface Modification on Polyamide 6.6 with Double Barrier Discharge (DBD) Plasma to Optimise Dyeing Process by Direct Dyes." Materials Science Forum 636-637 (January 2010): 846–52. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.846.
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Dyeing of polyamide fibers is normally made with acid dyes, however, it is somewhat difficult to achieve uniformity and control of pH and temperature must be carefully made. The possibility to dye polyamide 6.6 in a larger gamut of colours with good properties may be achieved using other classes of dyes after plasmatic modifications in textile substrates. Polyamide 6.6 fabrics were treated with Double Barrier Discharge (DBD) plasma obtained at atmospheric conditions in a semi-industrial machine and very positive results were obtained when dyeing is made with direct dyes. Surface modifications were evaluated, namely, roughness in terms of Atomic Force Microscopy, changes in chemical composition by X-Ray Photoelectron Spectroscopy (XPS) and microstructural analysis by SEM. In order to optimize dyeing process, different dye concentrations, pH and temperatures were attempted on dyeing with DBD treated fabrics. Important parameters were studied such as exhaustion, colour strength (K/S) and washing fastness. Chemical and physical effects of plasmatic discharge contribute to excellent results obtained in yield, exhaustion and fastness of dyeing of polyamide with direct dyes demonstrating extensive improvement of dye exhaustion from baths, easily achieving 100% in shorter dyeing times. These results mean less dyes in effluents and less time for dyeing processes. The cleanness of the processes and lower cost of direct dyeing are additional advantages when compared to difficulties in acidic dyeing of polyamide.
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Rejo, Amin, Rizky Tirta Adhiguna, and Debora Geovanni Rajagukguk. "Study of Natural Dyes and Pineapple Leaf Fibres Growing Locations within Plant Stems on Dyeing Intensity." E3S Web of Conferences 68 (2018): 01030. http://dx.doi.org/10.1051/e3sconf/20186801030.
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The physical properties of fibres produced from pineapple leaves can vary due to the differences in growing locations within a stem and are influenced by leaf growth age. Pineapple leaf fibres require quality increase, particularly in dyeing. The utilizing of natural dyes ingredients from suji (Dracaena angustifolia) leaves extract, turmeric (Curcuma domestica val) and sappan (Caesalpinia sappan [L.]) wood have friendly impact on the environment. Various types of natural dyes and leaf fibres growing location within the stems of pineapple plants and the color intensity are carefully examined in this study. The diversity of natural dyes used in dyeing influenced the fibres color intensity of pineapple leaves. Pinneaple leaf fibers growing loccation within pineapple stems impacted fibre color lightness intensity, the axis a* and b* colors. The utilization of pineapple leaf fibers from the base of plant stem is more suitable to be used as textile raw material due to its higher lightness level.
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Dixit, Bharat, Hitendram Patel, and Dhirubhai Desai. "Synthesis and application of new mordent and disperse azo dyes based on 2,4-dihydroxybenzophenone." Journal of the Serbian Chemical Society 72, no. 2 (2007): 119–27. http://dx.doi.org/10.2298/jsc0702119d.
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Novel mordent and disperse azo dyes were prepared by the coupling of various diazo solutions of aromatic amines with 2,4-dihydroxybenzophenone. The resultant dyes were characterized by elemental analyses as well as IR and NMR spectral studies. The UV-visible spectral data have also been discussed in terms of structural property relationship. The dyeing assessment of all the dyes was evaluated on wool and polyester textile fibers. The dyeing of chrome treated (i.e., chrome mordented) wool and polyesters was also monitored. The results show that a better hue was obtained on mordented fibers. The results of the anti-bacterial properties of the chrome dyes revealed that the toxicity of these dyes against bacteria is fairly good. .
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HARANINA, O., YA RED’KO, M. PROSKURKA, and R. VATAN. "SYNTHETIC DYES IN MEDICINE." HERALD OF KHMELNYTSKYI NATIONAL UNIVERSITY 297, no. 3 (July 2, 2021): 168–72. http://dx.doi.org/10.31891/2307-5732-2021-297-3-168-172.
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Synthetic dyes and intermediates for their synthesis are widely used in dyeing textile materials. The presence of the necessary functional groups in the structure of the dyes provides their biocidal properties. When using dyes with biocidal properties, the surface of textile materials is seized from destruction. Separate representative dyes protect the human body from the action of pathogenic microflora. It is necessary to create conditions for a timely attack by the textile material on bacteria and fungi. A sufficient number of natural and synthetic compounds exhibit antimicrobial activity. Many of these compounds are hazardous to humans and animals. Only a few chemical compounds can be recommended for practical use as antiseptic preparations. The inclusion of even a small fraction of antibacterial fibers in the structure of textile materials can provide the desired properties. The biostability of fibrous materials is influenced by the choice of dye. Not all dyes that have bactericidal activity in their pure form exhibit it when applied to textile material. For the manifestation of these functions, dyes must have groups responsible for their bacteriological activity. In developed countries, attempts are being made to uniform dyeing and bioprotective processing of textile materials. The combination of these processes is not only theoretical but also a promising area of research. When creating antibacterial textile materials, nanotechnology is being actively introduced. The use of nanotechnology reduces the cost of raw materials and materials. At the same time, the most promising for use in medicine are nanomaterials that meet the following requirements, such as biocompatibility and programmability of a positive effect on a biological object. Thus, the article analyzes the scientific literature in the field of dyes with biocidal properties.
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Kodric, Marija, and Dragan Djordjevic. "Modification of Polyester Textiles for Easier Dyeing with Disperse Dyes." AATCC Journal of Research 7, no. 5 (September 1, 2020): 9–16. http://dx.doi.org/10.14504/ajr.7.5.2.
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Modification of polyester fibers for more economical dyeing at lower temperatures without a carrier are considered in this study. Polyester dyeing is carried out industrially under rigorous conditions at high temperatures and under increased air pressure, and are treated with various solvents (primary alcohols) to make the fibers more permeable. As a result, the sorption properties, as well as the disperse dye dyeing ability, are improved. Dyeing of a modified polyester fabric at lower temperatures yielded better results than the standard dyeing of the unmodified polyester under the same conditions. The effects of fiber modification were analyzed through water absorption properties, wetting, swelling, differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) methods, and the degree of dyeing of the fabric was evaluated using CIELab parameters.
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Toprak, Tuba, and Pervin Anis. "Dyeing properties of orgonobase-induced poly(ethylene terephthalate) fabric." Textile Research Journal 90, no. 23-24 (May 21, 2020): 2658–73. http://dx.doi.org/10.1177/0040517520922946.
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Polyester is the most used of the synthetic fibers used in the textile industry. Nonetheless, due to its structure, the use of only disperse dyes for dyeing creates a significant weakness in its coloring. In this paper, the utilization of reactive and acid dyes in the dyeing of polyester after chemical modification with guanidine-based polymer is investigated. The dyeing of poly(ethylene terephthalate) (PET) fabrics with reactive and acid dyes was succeeded via modification with guanidine-based polymer. The effects of this polymer on disperse dyeing were also investigated. The effect of various parameters such as temperature, duration, pH, different amounts of salt and alkaline, the different dyes and processes were investigated for modifying and dyeing PET. The optimum parameters for reactive dyeing were found to be modification and dyeing in the same bath at 100° C for 60 minutes without salt and alkaline, for which the obtained color strength (12.87) was higher than that of conventional disperse dyeing with carrier (10.43). In addition, polymer modification at 130° C for 60 minutes before disperse dyeing provided higher color depth (24.39) than dyeing of PET by the conventional disperse high temperature method (22.48). Color fastness in laundering and the perspiration of modified and reactive dyed fabrics reached good to excellent levels (4/5). The modified and dyed samples were characterized using Scanning Electron Microscopy and Fourier Transform Infrared. Tensile tests and flexural rigidity tests for modified and reactive dyed samples were also conducted. The results indicate that the quality of the beginning material was not degraded after being modified and dyed.
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Van der Schueren, Lien, and Karen de Clerck. "Halochromic Textile Materials as Innovative pH-Sensors." Advances in Science and Technology 80 (September 2012): 47–52. http://dx.doi.org/10.4028/www.scientific.net/ast.80.47.
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Recently, an increasing interest in pH-sensitive textiles is recognized. These chromic textiles can be used as flexible sensors for various applications. The aim of the current research is to develop textile pH-sensors through the application of pH-sensitive dyes on various textile materials using different techniques. The results of our study show that halochromic dyes can be incorporated into conventional textiles by a conventional dyeing technique. Also coating the fabrics with a sol-gel layer containing the halochromic dye proved to be successful. The majority of these developed materials showed a clearly visible color change with a pH-variation. The response of the sensors was dependent on the density of the fabric but was generally relatively fast, especially for the sol-gel treated fabrics. The halochromic coloration of nanofibres was realized by directly adding the dyes during the fiber formation, which was shown to be highly effective. Again, a clear halochromic shift was observed. The response of these sensors was fast thanks to the high porosity of nanofibrous non-wovens. Yet, it should be kept in mind that the halochromic behavior of the dyes in the textile matrix altered compared to their behavior in solution which is most likely attributed to dye-fiber interactions. Generally we can conclude that various coloration techniques showed to be effective for the development of innovative textile pH-sensors.
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Telegin, Felix, Irina Shushina, Jian Hua Ran, Yulia Biba, Aleksandr Mikhaylov, and Viktoriia Priazhnikova. "Structure – Property Relationships for Dyes of Different Nature." Advanced Materials Research 821-822 (September 2013): 488–92. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.488.
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Systematic analysis of quantitative structure – property relationships for dyes of different nature has been reviewed. On the basis of the experimental results published in the literature and theoretical evaluation of amphiphilic and electrophilic properties of dyes of different nature several basic conclusions of scientific and practical importance are proposed. It was found that water/octanol partition coefficients exhibit correlation with dye partition between hydrophobic synthetic fibres and dyebath as well as dye affinity. Hydrophobicity of dyes controls several technical properties of dyes and dyeings, such as wash fastness and light fastness, migration factor, rate of dyeing and fixation rate. Energy of frontier electronic orbitals (HOMO and LUMO energies) correlates with different properties characterizing redox properties of dyes: oxidative and reductive destruction in chemical reactions, photochemical and biochemical destruction of dyes, wash and light fastness of dyeings. The results of this study are useful for physico-chemical analysis of dye sorption by textile fibres, destruction of dyes in polymers and solutions as well as for design of new dyes of high quality.
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Sala, Mireia, and M. Carmen Gutiérrez-Bouzán. "Electrochemical Techniques in Textile Processes and Wastewater Treatment." International Journal of Photoenergy 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/629103.
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The textile industry uses the electrochemical techniques both in textile processes (such as manufacturing fibers, dyeing processes, and decolorizing fabrics) and in wastewaters treatments (color removal). Electrochemical reduction reactions are mostly used in sulfur and vat dyeing, but in some cases, they are applied to effluents discoloration. However, the main applications of electrochemical treatments in the textile sector are based on oxidation reactions. Most of electrochemical oxidation processes involve indirect reactions which imply the generation of hypochlorite or hydroxyl radical in situ. These electrogenerated species are able to bleach indigo-dyed denim fabrics and to degrade dyes in wastewater in order to achieve the effluent color removal. The aim of this paper is to review the electrochemical techniques applied to textile industry. In particular, they are an efficient method to remove color of textile effluents. The reuse of the discolored effluent is possible, which implies an important saving of salt and water (i.e., by means of the “UVEC Cell”).
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Jiménez-Pacheco, Hugo, Gregorio Urbano Palma Figueroa, Javier Alonso Villegas Aragon, María del Carmen Camiña Pacheco, Antonio Erick Linares Flores Castro, and Lilia Mary Miranda Ramos. "Diffusion characteristics of dyeing in Polyester fiber garments referred to their mixtures with cotton and composition." Veritas 20, no. 2 (October 24, 2019): 59. http://dx.doi.org/10.35286/veritas.v20i2.244.
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Currently, textile dyeing companies determine their market according to the raw materials processed, which are based on 100% cotton fibers, these fibers are directed to an exclusive market and therefore these companies establish criteria of high quality standards in each of its processes, dyeing being one of the most demanding due to its fastness parameters and color specifications, these characteristics establish the competitiveness of expanding a product portfolio with the incursion of 100% fiber-based clothing polyester and with cotton blends.Some studies suggest the implementation of the dyeing process of these fibers, allowing the organization to have new production alternatives, dyeing processes for polyester and cotton are carried out with heat treatment between 60 °C and 130 °C respectively, with the use of dispersed and chemical dyes; as in the dyeing of Polyester-Cotton that are made in bathrooms established in each stage. Color and solidity tests are performed according to quality parameters, with light and wash fastness controls. Within these dyeing conditions it is essential to determine the thermal gradients to be applied, whose variable must be controlled to optimize the dyeing of polyester fibers and mixtures.The present study evaluates the pre-treatments and the temperature gradient behavior stage in the dyeing process of polyester fibers, taking into account the dyeing curve, in which only the temperature gradient varies. Mathis-ALT-B equipment is used for the dyeing process, for thermal gradient conditions of 135 °C with gradients of 0.3-4.0 °C/min, rotation speed 40-70 RPM, and as colorants were used Novacron, Terail and Liandisperse for cotton and polyester fibers respectively. The results show that the use of dispersants and anti-breakage agents work to prevent failures and improve the corresponding colors, but a high gradient increases the migration of the dye and breaks in the fibers, but in low gradients (2 ° C/min ) The quality of diffusion and dyeing is better and, therefore, prevents reprocessing in the dyeing stage.
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Dolca, Cristina. "TEXTILES COLOURED WITH NATURAL DYES OF VEGETAL ORIGIN." Scientific Bulletin Series D : Mining, Mineral Processing, Non-Ferrous Metallurgy, Geology and Environmental Engineering 32, no. 2 (2018): 81–89. http://dx.doi.org/10.37193/sbsd.2018.2.09.
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Spontaneous flora offers a wide variety of plants with different types of tinctures, which can be used to obtain pleasing, harmonious, non-reproducible, wash-resistant and light-resistant colors. In each plant we find one or more pigments, from roots, grains, stems, twigs, flowers, fruits or wood. The colorant is extracted using various methods, from fresh or dried plants. The natural dye is fixed on the fibers by treating in different phases of the dyeing process with a mordant, resulting in a "resistant" and insoluble "varnish". During millenia, the human eye has discovered, through an empirical work. other means of dyeing textiles, finding natural sources of dyeing materials in plants, molluscs and insects. Painting natural fiber textiles with plant-based dyes is not complicated but requires patience in obtaining dye, patience that is rewarded with a variety of vivid, warm, persistent, incomparable palette of colors that are in harmony with each other!
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Adamek, Ewa, Wojciech Baran, Justyna Ziemiańska, and Andrzej Sobczak. "The Comparison of Photocatalytic Degradation and Decolorization Processes of Dyeing Effluents." International Journal of Photoenergy 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/578191.
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Treatment of dye effluents resulting from the industrial scale dyeing of cotton, polyacrylic fibres, leather, and flax fabrics by photocatalytic methods was investigated. Photocatalytic processes were initiated by UV-a light (λmax366 nm) and were conducted in the presence of TiO2, TiO2/FeCl3, or FeCl3as photocatalysts. It was found that the photocatalytic process carried out with TiO2and TiO2/FeCl3was the most effective method for decolorization of textile dyeing effluents and degradation of dyes, except for effluents containing very high concentrations of stable azo dyes. During the photocatalytic degradation of anionic dyes, a mixture of TiO2/FeCl3was more effective, while in the case of cationic dyes, more suitable seems to be TiO2alone.
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Azam, Farooq, Kashif Iqbal, Faiza Safdar, Tanveer Hussain, Munir Ashraf, and Abdur Rehman. "An Investigation Into the Effect of Different Parameters on the Dyeing of High-Performance M-Aramid Fiber and Its Optimization." Clothing and Textiles Research Journal 38, no. 2 (August 26, 2019): 90–103. http://dx.doi.org/10.1177/0887302x19870872.
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M-aramid fibers have very good flame-retardant properties and are mostly used in protective textiles such as racing or firefighter suits. The dyeing and fastness properties of m-aramid fibers are investigated in this article in a batch process to optimize dyeing parameters such as dye concentration, salt, swelling agent, and temperature. The exhaustion at an acidic pH, preferably in the range of 4–5, indicated good results. The color yield of m-aramid fibers was found to be dependent on the concentration of swelling agent, salt, and dye, as well as the dyeing temperature. The effect of swelling agent on the K/S of m-aramid fibers with cationic dyes, along with their fastness properties, is investigated and reported in detail.
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Tang, Songsong, Guoqiang Chen, and Gang Sun. "Computer-Assisted Design of Environmentally Friendly and Light-Stable Fluorescent Dyes for Textile Applications." International Journal of Molecular Sciences 20, no. 23 (November 27, 2019): 5971. http://dx.doi.org/10.3390/ijms20235971.
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Five potentially environmentally friendly and light-stable hemicyanine dyes were designed based on integrated consideration of photo, environmental, and computational chemistry as well as textile applications. Two of them were synthesized and applied in dyeing polyacrylonitrile (PAN), cotton, and nylon fabrics, and demonstrated the desired properties speculated by the programs. The computer-assisted analytical processes includes estimation of the maximum absorption and emission wavelengths, aquatic environmental toxicity, affinity to fibers, and photo-stability. This procedure could effectively narrow down discovery of new potential dye structures, greatly reduce and prevent complex and expensive preparation processes, and significantly improve the development efficiency of novel environmentally friendly dyes.
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Su, Ting, Ying Han, Hongyan Liu, Lixin Li, Zongcai Zhang, and Zhengjun Li. "The surface modification by O2 low temperature plasma to improve dyeing properties of Rex rabbit fibers." Journal of Engineered Fibers and Fabrics 14 (January 2019): 155892501985402. http://dx.doi.org/10.1177/1558925019854024.
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Dyeability of the fiber plays a very important role in the textile industry. The presence of cuticle scales on the surface of Rex rabbit fibers brings difficulties to dyeing process. In this study, O2 low temperature plasma was used to improve the dyeability of Rex rabbit fibers and the two key parameters including the treating time and discharge power were optimized during O2 low temperature plasma treatment. The impact of plasma treatment on the surface morphology, physical-chemical properties, and dyeing behavior of Rex rabbit fibers using anionic dyes were investigated by a series of characterization methods such as scanning electron microscopy, atomic force microscopy, Fourier transform infrared–attenuated total reflection, and X-ray photoelectron spectroscopy. The surface dyeability and color fastness were studied by K/S measurement and washing fastness, respectively. The influence of O2 low temperature plasma treatment on the mechanical properties of Rex rabbit fibers was inspected by the tensile strength measurement. The wettability of the samples was evaluated in terms of wetting time and contact angle. The O2 low temperature plasma treatment resulted in a dramatic improvement in wettability of Rex rabbit fibers. X-ray photoelectron spectroscopy and Fourier transform infrared–attenuated total reflection analysis show that oxygen plasma treatment led to a significant increase in the content of sulfur oxides and polar groups such as (–C=O, –OH, and –NH2) on the fiber surface and resulted in reinforced wettability, dyeing rate and dyeing fixation of Rex rabbit fibers.
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Sukenik, Naama, David Iluz, Zohar Amar, Alexander Varvak, Orit Shamir, and Erez Ben-Yosef. "Early evidence of royal purple dyed textile from Timna Valley (Israel)." PLOS ONE 16, no. 1 (January 28, 2021): e0245897. http://dx.doi.org/10.1371/journal.pone.0245897.
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In the context of a broad study aimed at examining dyeing technologies in the Timna textiles collection, three samples of prestigious fibers dyed with murex sea snail were identified. Our identification is based on the presence of 6-monobromoindigotin and 6,6-dibromoindigotin components (detected using HPLC analysis), which is considered unequivocal evidence for the use of murex-derived purple dyestuff. Furthermore, by comparing the analytical results with those obtained in a series of controlled dyeing experiments we were able to shed more light on the specific species used in the dyeing process and glean insights into the ancient dyeing technology. The samples originated from excavations at the extensive Iron Age copper smelting site of “Slaves’ Hill” (Site 34), which is tightly dated by radiocarbon to the late 11th–early 10th centuries BCE. While evidence for the important role of purple dyes in the ancient Mediterranean goes back to the Middle Bronze Age (early 2nd millennium BCE), finds of dyed textiles are extremely rare, and those from Timna are the oldest currently known in the Southern Levant. In conjunction with other observations of the very high quality of the Timna textiles, this provides an exceptional opportunity to address questions related to social stratification and organization of the nomadic society operating the mines (early Edom), the “fashion” of elite in the region during the early Iron Age, trade connections, technological capabilities, and more.
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Ledakowicz, Stanisław, Lucyna Bilińska, and Renata Żyłła. "Application of Fenton's Reagent in the Textile Wastewater Treatment Under Industrial Conditions." Ecological Chemistry and Engineering S 19, no. 2 (January 1, 2012): 163–74. http://dx.doi.org/10.2478/v10216-011-0013-z.
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Application of Fenton's Reagent in the Textile Wastewater Treatment Under Industrial Conditions Application of reactive dyes is very popular in textile industry as these dyestuffs are characterized by good fastness properties. Constapel et al in 2009 estimated the production of this type of dyes for over 140,000 Mg/year. The reactive dyes are mostly (50%) employed for coloration of cellulosic fibers, however they can also be applied on wool and nylon. Unfortunately, they possess a low degree of fixation (50÷90%), since the functional groups also bond to water, creating hydrolysis and the excess of dyes applied cause a colored pollution of aqueous environment. Moreover, dyeing process requires the use of: electrolytes in the form of aqueous solutions of NaCl or Na2SO4 in the concentration up to 100 g/dm3, alkaline environment (pH > 10) and textile auxiliary agents (including detergents). Therefore, the wastewater generated during the reactive dyeing processes is characterized by high salinity, pH value and color, and due to low value of the BOD5/COD ratio are nonbiodegradable. The successful methods of textile wastewater treatment could be Advanced Oxidation Processes (AOPs), amongst which the Fenton reagent seems to be most promising as it is the cheapest and easy in use. Based on the newest literature survey it was found that many successful tests with Fenton reaction were performed mainly in decolorization. However, not enough attention was devoted to decolorization of real industrial wastewater containing dyes, detergents and salts NaCl, or Na2SO4. The experiments carried out in a laboratory scale were focused on the impact of NaCl and textile auxiliary agent (liquid dispersing and sequestering agent) on an inhibition of decolorization process by Fenton's reagent. The objects of the investigation were synthetic mixtures simulating the composition of real textile wastewater as well as the real industrial wastewater generated in the reactive dyeing. The inhibition of the Fenton decolorization in the presence of NaCl and liquid dispersing and sequestering agent was demonstrated. Additional experiments using pulse radiolysis were carried out in order to confirm the inhibition of chloride in the decolorization process.
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Ahsan, Rakhshan, Afsheen Masood, Rabiah Sherwani, and Hafiza Khushbakhat. "Extraction and Application of Natural Dyes on Natural Fibers: An Eco-Friendly Perspective." Review of Education, Administration & LAW 3, no. 1 (June 30, 2020): 63–75. http://dx.doi.org/10.47067/real.v3i1.22.
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Dyes derived from natural resources like plant leaves, roots, bark, fruits, stem, insect secretions, and minerals were the only dyes available in the history of mankind for dyeing textiles. The first discovery of the synthetic dyes dates back to 1856.Due to the industrialization and globalization, the use of the synthetic dyes has increased in past century. The variety in hue, shades and economic benefits of synthetic dyes have declined gradually and slowly. However, the environmental threats and health hazards to humans have pushed them to the old and natural dyeing resources. Textiles colored with natural dyes are preferred by eco-friendly buyers. Today there is a niche market for such textiles. This paper reviews the available floral, trees, leave, barks, herbs, etc resources, application and extraction of colorants from different natural dyes, and effect of different mordents.
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Shams Nateri, A., E. Dehnavi, A. Hajipour, and E. Ekrami. "Dyeing of polyamide fibre with cochineal natural dye." Pigment & Resin Technology 45, no. 4 (July 4, 2016): 252–58. http://dx.doi.org/10.1108/prt-05-2015-0043.
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Purpose The aim of the paper was to study the effects of mordanting methods on the absorption behaviour of cochineal natural dye on polyamide fibres. Design/methodology/approach Iron sulphate and aluminium potassium sulphate salts were used as mordanting agents, and bottom mordanting, meta-mordanting and after mordanting methods were applied in the dyeing of polyamide samples with the cochineal natural dye. Colourimetric evaluations were carried out, and the principal component analysis was used to investigate the spectrophotometric properties of the dyed samples. Fastness properties of the dyed samples were also assessed. Findings The obtained results indicate that the method of mordanting has a great effect on the obtained shades, absorption behaviour and fastness properties. Based on the results, it was concluded that polyamide fabrics could be successfully dyed with cochineal and combination of dyeing with different mordanting methods, and different mordanting agents would develop the range of obtainable shades. Originality/value The textile and apparel industries have been widely criticised for their role in polluting the environment. So, the use of synthetic dyes has been limited and the use of natural dyes has increased. The literature survey indicates that there have been relatively few works investigating the dyeing of polyamide with cochineal natural dye. This research studies the effects of mordanting methods and mordant types on colourimetric and fastness properties of cochineal-dyed polyamide samples.
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Aldalbahi, Ali, Mehrez E. El-Naggar, Mohamed H. El-Newehy, Mostafizur Rahaman, Mohammad Rafe Hatshan, and Tawfik A. Khattab. "Effects of Technical Textiles and Synthetic Nanofibers on Environmental Pollution." Polymers 13, no. 1 (January 3, 2021): 155. http://dx.doi.org/10.3390/polym13010155.
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Textile manufacturing has been one of the highest polluting industrial sectors. It represents about one-fifth of worldwide industrial water pollution. It uses a huge number of chemicals, numerous of which are carcinogenic. The textile industry releases many harmful chemicals, such as heavy metals and formaldehyde, into water streams and soil, as well as toxic gases such as suspended particulate matter and sulphur dioxide to air. These hazardous wastes, may cause diseases and severe problems to human health such as respiratory and heart diseases. Pollution caused by the worldwide textile manufacturing units results in unimaginable harm, such as textile polymers, auxiliaries and dyes, to the environment. This review presents a systematic and comprehensive survey of all recently produced high-performance textiles; and will therefore assist a deeper understanding of technical textiles providing a bridge between manufacturer and end-user. Moreover, the achievements in advanced applications of textile material will be extensively studied. Many classes of technical textiles were proved in a variety of applications of different fields. The introductory material- and process-correlated identifications regarding raw materials and their transformation into yarns, fibers and fabrics followed by dyeing, printing, finishing of technical textiles and their further processing will be explored. Thus, the environmental impacts of technical textiles on soil, air and water are discussed.
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Kaššák, Pavol, and Katarína Kaffková. "Usage of Tagetes and Tanacetum as Dye Plants for Natural and Artificial Fibers." Open Agriculture 3, no. 1 (August 1, 2018): 291–95. http://dx.doi.org/10.1515/opag-2018-0031.
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Abstract This study is presenting results from an experiment with two well-known dye plants and their interaction with different types of textile fibres. Briefly, fresh and dry inflorescences of Tagetes patula and dry inflorescences of Tanacetum vulgare were used for the preparation of a dyeing bath. Then, different samples of cloth (made from natural plant fibres (wool), artificial fibres (sloter and ortalion), both artificial and plant fibres (canvas) and natural animal fibres (wool)) were immersed into the hot dyeing baths. Results showed that both chosen plant species are suitable for textile dyeing, but they differ in colour density.
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Wei, Bo, Qiu-Yuan Chen, Guoqiang Chen, Ren-Cheng Tang, and Jun Zhang. "Adsorption Properties of Lac Dyes on Wool, Silk, and Nylon." Journal of Chemistry 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/546839.
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There has been growing interest in the dyeing of textiles with natural dyes. The research about the adsorption properties of natural dyes can help to understand their adsorption mechanism and to control their dyeing process. This study is concerned with the kinetics and isotherms of adsorption of lac dyes on wool, silk, and nylon fibers. It was found that the adsorption kinetics of lac dyes on the three fibers followed the pseudosecond-order kinetic model, and the adsorption rate of lac dyes was the fastest for silk and the slowest for wool. The activation energies for the adsorption process on wool, silk, and nylon were found to be 107.15, 87.85, and 45.31 kJ/mol, respectively. The adsorption of lac dyes on the three fibers followed the Langmuir mechanism, indicating that the electrostatic interactions between lac dyes and those fibers occurred. The saturation values for lac adsorption on the three fibers decreased in the order of wool > silk > nylon; the Langmuir affinity constant of lac adsorption on nylon was much higher than those on wool and silk.
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Sundaramurthy, V. T., and Sujata Saxena. "The Environment and Textile Industry-Friendly Hirsute Cotton Variety, Indica." International Journal of Bio-resource and Stress Management 11, no. 5 (October 31, 2020): 451–55. http://dx.doi.org/10.23910/1.2020.2151d.
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A short statured variety Indica with open type of canopy that matured in 130 days yielded 2246 kg of seed cotton ha-1 with better quality of fibres than the other popular varieties MCU5, MCU5 VT and Surabhi which recorded 6.50 to 12.15% lesser yield in the village farms with lower quality of fibres than Indica. The bleached fibres of variety Indica were brighter white in colour with lower tinge of yellowness than the other varieties. Upon dyeing with a blue and a red reactive dye to 0.5% shade, the uptake of dyes by Indica was more than the other varieties and it left lesser dye in the dye bath irrespective of the dye. The variety MCU 5VT recorded the lowest dye uptake and left more dye residue in the dye bath as compared to the other varieties. The dyed fibres of Indica were darkest in colour with better colour strength than the other varieties which may save some dye costs for the textile industries since a darker colour can be produced with lesser amount of dye. Since Indica left least residual dye, dye effluent from this variety will cause lesser damage to the environment and soil. It may also help the Textile industries to spend less on treatment of dye effluent as lesser quantity of residual dye is likely to be present in it. Use of this cotton variety may thus reduce the overall dyeing costs and make the garments made out of the fibres of this variety to cost less than the other popular cotton varieties.
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Slama, Houda Ben, Ali Chenari Bouket, Zeinab Pourhassan, Faizah N. Alenezi, Allaoua Silini, Hafsa Cherif-Silini, Tomasz Oszako, Lenka Luptakova, Patrycja Golińska, and Lassaad Belbahri. "Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods." Applied Sciences 11, no. 14 (July 6, 2021): 6255. http://dx.doi.org/10.3390/app11146255.
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Natural dyes have been used from ancient times for multiple purposes, most importantly in the field of textile dying. The increasing demand and excessive costs of natural dye extraction engendered the discovery of synthetic dyes from petrochemical compounds. Nowadays, they are dominating the textile market, with nearly 8 × 105 tons produced per year due to their wide range of color pigments and consistent coloration. Textile industries consume huge amounts of water in the dyeing processes, making it hard to treat the enormous quantities of this hazardous wastewater. Thus, they have harmful impacts when discharged in non-treated or partially treated forms in the environment (air, soil, plants and water), causing several human diseases. In the present work we focused on synthetic dyes. We started by studying their classification which depended on the nature of the manufactured fiber (cellulose, protein and synthetic fiber dyes). Then, we mentioned the characteristics of synthetic dyes, however, we focused more on their negative impacts on the ecosystem (soil, plants, water and air) and on humans. Lastly, we discussed the applied physical, chemical and biological strategies solely or in combination for textile dye wastewater treatments. Additionally, we described the newly established nanotechnology which achieves complete discharge decontamination.
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Ujjin, Suchada, and Suesat Jantip. "Study on the Dyeing Properties of Poly(Lactic Acid) and Silk Yarns with Natural Dyes." Advanced Materials Research 486 (March 2012): 384–87. http://dx.doi.org/10.4028/www.scientific.net/amr.486.384.
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This research aimed to study the dyeing properties on the PLA and silk yarns of the natural dyes obtained from various materials, viz. marigold petals (Tagetes erecta L.), rhubarb rhizomes (Radix et Rhizoma Rhei), garcinia barks (Garcinia Dulcis Kurz), turmeric rhizomes (Curcuma Longa Linn.), sappan barks (Caesalpinia sappan Linn.) and catechu barks (Acacia catechu Willd.). The color properties of the dyed yarns was determined and compared. The results observed the different color properties (L*, a* and b* values) and a shift of λmaxof the dyes on the PLA and silk yarns. This change in color properties of each natural dye was expected to be affected by the types of substrate (textile fiber) and also the chemical nature of the natural dyes. The study of the build-up properties indicated that the turmeric dye is the only natural dye which showed an outstanding performance on PLA and silk. A high degree of color yield of turmeric dye was obtained on both yarns, whereas a poor build-up was observed for the rest of the dyes.
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Плаван, В. П., І. М. Ткаченко, І. О. Ляшок, and В. І. Ступа. "ЕКОЛОГІЧНО-БЕЗПЕЧНА ТЕХНОЛОГІЯ ОЗДОБЛЕННЯ ТЕКСТИЛЬНИХ МАТЕРІАЛІВ З ВИКОРИСТАННЯМ ЕКСТРАКТУ ЧАШОЛИСТОК ПОЛУНИЦІ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 142, no. 1 (June 3, 2020): 102–11. http://dx.doi.org/10.30857/1813-6796.2020.1.10.
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Development of ecologically safe technology of finishing the textile materials using strawberry sepals extract and determination of influence for a mordant with salts from various metals on coloring quality. The technological parameters of the dyeing process by strawberry sepals extract were determined for linen, cotton, viscose and wool textile materials using pre-treatment with or without metal salts of Cu2+, Zn2+, Ni2+, Fe3+, Al3+. The color characteristics of the samples were determined using Adobe Photoshop CS6 software to evaluate the color quality. The resistance of the dyeing the textile materials to physical and chemical influences were determined by standard methods for textile materials. Ecologically safe technology of finishing the cellulosic and wool textile materials using strawberry sepals extract has been developed. The dyeing of textile materials made from cellulose fibers made it possible to obtain coloration from light to dark brown. After dyeing, the brightest samples were found based on wool fibers. Depending on the type of mordant, the following colors were obtained: Cu2+ cation made it possible to obtain green-brown shades, Al3+, Zn2+, Ni2+ cations gave colors in the yellow-brown shades; Fe3+ cation gave colors in black and brown shades. In general, the color fastness to wet and dry crocking for textile materials after dyeing with strawberry sepals extract are maximum for all specimens pre-treated with ferric cations except cotton and linen materials. The stability of color to perspiration in cotton, linen, viscose and wool samples ranges from 4 to 5 points. Color fastness to washing for samples from cellulose fibers are preferably 4-5 points, and for woolen is 4 points. The scientific novelty of the work is to determine the basic regularities of the dyeing process after pre-treatment with salts of metals Cu2+, Zn2+, Ni2+, Fe3+, Al3+ using as a dye of the strawberries sepals extract, which is a waste of the food industry. The technological parameters of the dyeing process by strawberry sepals extract, for cotton, viscose and woolen textile materials using pretreatment with metal salts of Cu2+, Zn2+, Ni2+, Fe3+, Al3+ were developed.
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Mahne, Dunja, Urška Lavrenčič Štangar, Polonca Trebše, and Tjaša Griessler Bulc. "TiO2-Based Photocatalytic Treatment of Raw and Constructed-Wetland Pretreated Textile Wastewater." International Journal of Photoenergy 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/725692.
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Approximately, 15% of the total textile colorant production is estimated to be lost during dyeing and processing of textile fibres. If left untreated, these wastewaters can represent a serious environmental threat. In the present paper a combination of photocatalytic and biological degradation of prepared textile wastewaters (simulation of real textile effluent) is presented. Samples have been monitored through the course of photocatalytic experiments: change in UV-VIS absorbance spectra and complete decolouration were achieved for all three tested dyed wastewaters; however, only partial COD removal was achieved with photocatalytic oxidation (PCOx) and photocatalytic ozonation (PCOz). Toxicity test (Vibrio fischeri) of untreated and pretreated (constructed wetland, CW) samples showed a decrease in toxicity values only for the red-dyed wastewater. Comparison of efficiency of PCOx and PCOz for decolouration and mineralization of three structurally different dyes (anthraquinone and two azo dyes) has been done. CW pretreatment caused faster decolouration and substantial COD removal in PCOx (up to 45%). Pretreatment also accelerated decolouration during PCOz, but it accelerated COD removal only in the case of red-dyed wastewater due to short irradiation times applied.
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Shen, Jia Jia, and Ying Yang. "Kinetics and Thermodynamics Studies of Prodigiosin Dyeing on Polyester." Advanced Materials Research 779-780 (September 2013): 156–60. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.156.
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Prodigiosin is a natural pigment which has antimicrobial activity and produced by a microorganism, but it is insoluble in water, thereby limiting their application in textile dyeing. With the study of the Prodigiosin’s kinetics and thermodynamics on PET, the feasibility of using Prodigiosin as disperse dyes was discussed. The thermodynamics results show that the up-take of Prodigiosin in PET fiber is linear to the dye bath concentration, with increasing temperature, the distribution coefficient decreases and the thermodynamic affinity of the dye has little gown up, the enthalpy and entropy of dyeing were -2.51[kJ/mol] and 5.05[J/(mol·K)] respectively, which show that PET dyeing with prodigiosin is a exothermic process and the diffusion coefficient increases with the temperature rise. The activation energy calculated with the Arrhenius equation is 6.09 [kcal /mol].
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Mavlonov, Mirzoolim H., Dmitry N. Kuznetsov, and Konstantin I. Kobrakov. "Azo compounds based on 2-(4'-aminophenyl)-4-quinoline carboxylic acid: synthesis and properties." Butlerov Communications 61, no. 1 (January 31, 2020): 146–51. http://dx.doi.org/10.37952/roi-jbc-01/20-61-1-146.
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Synthesis and studies of the properties of dyes for coloring textile materials from fibers of various chemical structures, which contain, in addition to chromophore, also pharmacophore groups in the molecule, which impart biocidal properties to both the dyes themselves and the materials dyed by them, are interesting both theoretically and from an applied point of view. The article presents data on the synthesis of a series of previously undescribed azo compounds based on 2-(4'-aminophenyl)-4-quinolinecarboxylic acid and aromatic hydroxy- and aminocompounds of the naphthalene series. Five naphthylazo derivatives of 2-(4'-aminophenyl)-4-quinolinecarboxylic acid were synthesized in high yields. The structures of the synthesized azo compounds were confirmed by mass-spectrometry and UV-spectroscopy. In the electronic absorption spectra, the absorption maximum of the synthesized azo compounds lies in the range of 480-550 nm, in contrast to the initial diazo and azo components, the absorption maxima of which lie in the near UV region of the spectrum. Dyeing techniques have been developed that provide optimal indicators for the process of coloration of polypeptide fibers (wool and nylon) with synthesized dyes. The colors of the samples have bright, and deep colors of orange-red-violet scales. The obtained painted samples were examined for color fastness to wet processing according to GOST 9733.4-83, sweat GOST 9733.6-83 and light exposure GOST 11279.2-83. It has been shown that the synthesized azo compounds can be used for coloring woolen and polyamide fibers and provide satisfactory performance properties of dyes, which is consistent with generally accepted ideas about acid dyes. Samples of dyed polyamide fabric showed satisfactory color fastness to light (1-3 points), the best result was shown by wool samples dyed with the studied dyes.
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Borgstädt, Tim, and Boris Mahltig. "Laser treatment of high-performance Kynol fibers: An example as alternative tool for coloration and imaging on surfaces of high-performance fibers." Tekstilna industrija 68, no. 3 (2020): 4–9. http://dx.doi.org/10.5937/tekstind2003004b.
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Novolac resins are used to prepare high-performance flame-retardant fibers, which are also supplied under the brand name Kynol fibers. In the current study, Kynol fiber materials are treated with a laser beam to introduce dark coloration at distinct areas on the textile surface. By this, imaging and writing on the textile surface is possible. For investigation, two different types of Kynol fiber materials are used - a non-woven fiber felt and a woven fabric. It is shown that a laser treatment of medium intensity can introduce a change to dark coloration with good rubbing fastness. The writing of letters and symbols onto fabrics is possible. However, treatments with strong laser intensity lead to significant fiber damages and low rubbing fastness. Nevertheless, the presented method is a promising tool to apply images onto flame retardant fabrics from high performance fibers, which are difficult to dye using conventional techniques of dyeing and printing.
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Liu, Ning, and Gang Sun. "Environmentally Friendly Multifunctional Treatments of Textiles with Photo-Active Colorants." Advanced Materials Research 441 (January 2012): 780. http://dx.doi.org/10.4028/www.scientific.net/amr.441.780.
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As an effort to develop environmentally friendly light-induced functional treatments for fabrics, certain acid dyes were incorporated onto different fabrics. The treated fabrics demonstrated powerful and durable antimicrobial and oxidative detoxifying functions after light exposure. In this presentation, we will report the latest progresses in using certain anthraquinone compounds in treatments of wool, nylon, silk and cotton fabrics. The dyed fabrics could demonstrate antimicrobial functions upon exposed to UVA (365 nm) and fluorescent light. However, it was more interesting to observe that the surfaces of the dyed wool fibers became polished with scales removed after being exposed to UV or day light for certain time. The chemical structures and thermal properties of the dyed fabrics were investigated by using different instrumentation such as SEM, FTIR, and other instruments, and the results verified the proposed oxidation reactions of the fibers. This research proves that dyeing fabrics with photo-active dyes could be a new green functional treatment on textiles.
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Lambrecht, Louise, Jaime Gisbert-Payá, Eva Bou-Belda, and María Ángeles Bonet. "Optimization of tea extracts composition to dye cotton. Time and temperature influence." Journal of Applied Research in Technology & Engineering 1, no. 1 (July 21, 2020): 3. http://dx.doi.org/10.4995/jarte.2020.13480.
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<div data-canvas-width="583.1287199999997">The last few years natural dyes rose in value. Some synthetics dyes are proven to be environmentally harmful and can cause negative effects. Due to the eco awareness the natural dyes were again wildly used. Tea extracts from the Camellia sinensis plant were used. Tea has a large range of phytoconstituents and some can be transferred onto the cotton fabric. The optimal time and temperature to obtain as many phytoconstituents as possible had to be established. The aim of this study was to optimize the extraction process from tea so as to apply the maximum concentration of phytoconstituents onto the textile fibers and improve the cotton functionalization (Ultra violet protection for example) once it is dyed with the extract. Results demonstrate time and temperature had a great influence on the optimization of the tea extracts. We could conclude that after 2 hours the most polyphenols, hydrolysable tannins and condensed tannins are obtained and increasing the time didn’t add any value. The temperature was a really important factor because the polyphenols derived around 70 °C so both the extraction temperature and dyeing treatment should be below 70 °C. Wastewater were characterized in order to determine the phytoconstituents were in the cotton fibres.</div>
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Otutu, O. J., and A. K. Asiagwu. "Synthesis and Application to Polyester and Nylon 6 Fabrics of Hetaryl Bis-Azo Disperse Dyes Based on 6-Amino-2,4-Dihydroxypyrimidine and 4-Methoxy-2-Nitroaniline Moieties." Journal of Scientific Research 11, no. 2 (May 1, 2019): 215–24. http://dx.doi.org/10.3329/jsr.v11i2.38734.
Full textAbstract:
Six new bis-azo disperse dyes were synthesized by linking various aryl amino and hydroxyl derivatives to 4-methoxy-2-nitroaniline and 6-amino-2,4-dihydroxypyrimidine moieties through diazo coupling reactions. The structures of the bis-azo dyes were identified by Fourier transform infrared, proton and carbon 13 nuclear magnetic resonance data. The prepared dyestuffs were applied onto polyester and nylon 6 fabrics and subsequently their fastness properties in terms of light, washing, sublimation and rubbing were determined. Compared with the light fastness of polyester fabrics, the light fastness of the dyed nylon 6 fabrics were slightly lower. The technical performance of the dyes on the two textile substrates used for the study, demonstrated their useful applications in the dyeing of synthetic fibres.
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Kuzmina, Nadezhda M., Dmitry S. Gusarov, Thi Ngok An Vu, and Olga V. Kovalchukova. "Synthesis and study of new azo dyes based on functionally substituted derivatives of salicylic acid." Butlerov Communications 63, no. 7 (July 31, 2020): 31–38. http://dx.doi.org/10.37952/roi-jbc-01/20-63-7-31.
Full textAbstract:
Three chromatographically pure azo dyes based on salicylic acid and para-nitroaniline were isolated in 60-64% yields. The structure of the synthesized compounds was proved by IR spectroscopy. The spectra of the compounds contain characteristic absorption bands associated with the vibrations of O–H, N–H, C=O, and N=N groups. The products precipitated as orange-brown powders, which corresponds to compounds with a short system of conjugated double bonds. The predominant tautomeric form of existence of the synthesized azo compounds was determined – 5,5'-(diazen-1,2-diyl)bis(2-hydroxybenzoic acid), 2-hydroxy-5-((4-nitrophenyl)-diazenyl)benzoic acid, 5-amino-2-hydroxy-4-((4-nitrophenyl) diazenyl) benzoic acid. It was shown that they all exist as azo-tautomers. To determine the dyeing power of potential dyes, a test cold dyeing was carried out on samples of a multichannel consisting of six main types of fabrics used in the textile industry, under conditions corresponding to dyeing with acid and reactive dyes. The ability of the compounds to act as acid dyes was established, coloring woolen, polyamide and acetate fibers in yellow-orange and beige-brown colors. The introduction of an amino group into the salicylic acid fragment weakens the color properties of the azo dye molecule. The calculation of the toxicity of compounds with intravenous and oral routes of administration, carried out according to the GUSAR program, shows their low toxicity (4-5 toxicity class). The introduction of an amino group into the azo dye molecule is accompanied by an increase in its toxicity. All isolated compounds comply with Lipinski's rule, which indicates their bioavailability. Prediction of the biological activity of the compounds, carried out using the PASS program, shows that with a probability of more than 90%, the synthesized compounds exhibit antiseptic properties without irritating the skin and mucous membranes. This allows the isolated compounds to be considered promising for use as dyes in cosmetics.
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Salem, Mohamed Z. M., Ibrahim H. M. Ibrahim, Hayssam M. Ali, and Hany M. Helmy. "Assessment of the Use of Natural Extracted Dyes and Pancreatin Enzyme for Dyeing of Four Natural Textiles: HPLC Analysis of Phytochemicals." Processes 8, no. 1 (January 2, 2020): 59. http://dx.doi.org/10.3390/pr8010059.
Full textAbstract:
In the present study, four natural textiles (cotton, linen, wool, and silk) were dyed with 14 naturally extracted dyes, and pancreatin enzyme was used in the dyeing process. The effects of pancreatin enzyme and its buffer on naturally dyed textile samples were evaluated. Two concentrations of pancreatin enzyme and buffer were used as pretreatments for dyed textiles. Proteinic fabrics showed the highest relative color strength (RCS) values of 137.23% and 132.2% when the pancreatin enzyme was applied on wool and silk dyed with pomegranate skin and bloodroot at concentrations A and B, respectively. Linen fiber dyed with catechu tree showed the highest total color difference (TCD) values with buffer (6.83) and pancreatin enzyme A (5.7) and B (6.3). This shows that there were no side effects of the pancreatin enzyme on the studied dyed textiles. By high-performance liquid chromatography (HPLC) analysis, the root extract from madder showed the presence of salicylic acid (1758.91 mg/kg extract), quercetin (844.23 mg/kg extract), ellagic acid (784.86 mg/kg extract) and benzoic acid (582.68 mg/kg extract) as main compounds. In cochineal extract the main compounds were rutin (37.732 mg/kg extract), kampherol (1915.98 mg/kg extract), myricetin (809.97 mg/kg extract), quercetin (496.76 mg/kg extract) and salicylic acid (193.87 mg/kg extract).
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Wang, Tingting, Wangbingfei Chen, Tingting Dong, Zihao Lv, Siming Zheng, Xiuming Cao, Qufu Wei, Reza A. Ghiladi, and Qingqing Wang. "Color-Variable Photodynamic Antimicrobial Wool/Acrylic Blended Fabrics." Materials 13, no. 18 (September 17, 2020): 4141. http://dx.doi.org/10.3390/ma13184141.
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Towards the goal of developing scalable, economical and effective antimicrobial textiles to reduce infection transmission, here we prepared color-variable photodynamic materials comprised of photosensitizer (PS)-loaded wool/acrylic (W/A) blends. Wool fibers in the W/A blended fabrics were loaded with the photosensitizer rose bengal (RB), and the acrylic fibers were dyed with a variety of traditional cationic dyes (cationic yellow, cationic blue and cationic red) to broaden their color range. Investigations on the colorimetric and photodynamic properties of a series of these materials were implemented through CIELab evaluation, as well as photooxidation and antibacterial studies. Generally, the photodynamic efficacy of these dual-dyed fabrics was impacted by both the choice, and how much of the traditional cationic dye was employed in the dyeing of the W/A fabrics. When compared with the PS-only singly-dyed material, RB-W/A, that showed a 99.97% (3.5 log units; p = 0.02) reduction of Staphylococcus aureus under visible light illumination (λ ≥ 420 nm, 60 min), the addition of cationic dyes led to a slight decrease in the photoinactivation ability of the dual-dyed fabrics, but was still able to achieve a 99.3% inactivation of S. aureus. Overall, our findings demonstrate the feasibility and potential applications of low cost and color variable RB-loaded W/A blended fabrics as effective self-disinfecting textiles against pathogen transmission.
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Wielewski, Leonardo Pellizzari, Tatiana Zuccolotto, Marlene Soares, Liziê Daniela Tentler Prola, and Marcus Vinicius de Liz. "Degradation of the Textile Dye Reactive Black 5 by Basidiomycetes." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 15, no. 1 (February 3, 2020): 1. http://dx.doi.org/10.4136/ambi-agua.2464.
Full textAbstract:
Reactive Black 5 (RB5) is one of the synthetic reactive dyes most used in the textile industry, due to its solubility in water and reactive groups which form covalent bonds within the fiber. In the process of dyeing fabrics, however, it is estimated that 12-14% of dyes are released into the effluent. This work evaluated the biodegradation of RB5 dye, adsorbed in polyurethane foam, by basidiomycetes (Phanerochaete chrysosporium ATCC 24725, Pleurotus ostreatus and Pleurotus floridae). Results were evaluated considering the partial- or total medium discoloration, the adsorption capacity of the dye in the polyurethane foam (PUF) and the respirometric measurements. The results showed that Phanerochaete chrysosporium was able to partially degrade 50 mg L-1 of RB5 in pH 6.0, when cultivated in Petri dishes. When this microorganism was cultivated in PUF cubes saturated with RB5 solution (50 mg L-1, pH 6.0), CO2 production reached an accumulated value of 2.16 mg on the fifteenth day, revealing the growth of the microorganism and consequently the contaminant degradation, which was used as the source of nutrients.