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Articles de revues sur le sujet « PVA »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 26 juillet 2025

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1

C., BHATTACHARYYA, N. BHATTACHARYYA S., and M. MANDAL B. "Poly(vinyl propionate) and Poly(ethyl acrylate)- A Miscible Polymer Pair." Journal of Indian Chemical Society Vol. 63, Jan 1986 (1986): 157–60. https://doi.org/10.5281/zenodo.6255725.

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Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta-700 092 A new miscible polymer pair, <em>viz. </em>poly(vinyl propionate) (PVPr) and poly(ethyl acrylate) (PEA) is reported. Blends of these polymers form clear films, clear solutions in common solvents and have single glass transition temperatures. Miscibility of these two polymers in binary combinations with poly(methyl acrylate) (PMA) or poly(vinyl acetate) (PVA) was also examined. Differential scanning calorimetry (D.S.C.) reveals that PVPr+PVA, PEA +PVA, PMA+PVPr and PMA +PEA are immisc

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Yekymov, Evgenee, David Attia, Yael Levi-Kalisman, Ronit Bitton, and Rachel Yerushalmi-Rozen. "Charge Regulation of Poly(acrylic acid) in Solutions of Non-Charged Polymer and Colloids." Polymers 15, no. 5 (2023): 1121. http://dx.doi.org/10.3390/polym15051121.

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Weak polyelectrolytes (WPEs) are responsive materials used as active charge regulators in a variety of applications, including controlled release and drug delivery in crowded bio-related and synthetic environments. In these environments, high concentrations of solvated molecules, nanostructures, and molecular assemblies are ubiquitous. Here, we investigated the effect of high concentrations of non-adsorbing, short chains of poly(vinyl alcohol), PVA, and colloids dispersed by the very same polymers on charge regulation (CR) of poly(acrylic acid), PAA. PVA does not interact with PAA (throughout

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Huang, Dan, Zhi-De Hu, Tian-Yuan Liu, et al. "Seawater degradation of PLA accelerated by water-soluble PVA." e-Polymers 20, no. 1 (2020): 759–72. http://dx.doi.org/10.1515/epoly-2020-0071.

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AbstractIn order to promote the degradation of PLA in seawater, a series of seawater-degradable polyester blends PVA/PLA were prepared by blending biodegradable polylactic acid (PLA) with water-soluble modified polyvinyl alcohol (PVA) in this paper. ADR 4370S was introduced to bring a certain degree of improvement in compatibility of PVA/PLA blends. The results of degradation test in natural seawater for 180 days show that the weight loss of PVA/PLA blends in seawater is much higher compared with that of pure PLA. PVA can be used as an effective hydrolysis accelerator for PLA matrix, helping t

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Ge, Xiaotian, Li Zhang, Xuanhe Wei, Xi Long, and Yingchao Han. "Plasma Surface Treatment and Application of Polyvinyl Alcohol/Polylactic Acid Electrospun Fibrous Hemostatic Membrane." Polymers 16, no. 12 (2024): 1635. http://dx.doi.org/10.3390/polym16121635.

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In this study, an improved PVA/PLA fibrous hemostatic membrane was prepared by electrospinning technology combined with air plasma modification. The plasma treatment was used to modify PLA to enhance the interlayer bonding between the PVA and PLA fibrous membranes first, then modify the PVA to improve the hemostatic capacity. The surfaces of the PLA and PVA were oxidized after air plasma treatment, the fibrous diameter was reduced, and roughness was increased. Plasma treatment enhanced the interfacial bond strength of PLA/PVA composite fibrous membrane, and PLA acted as a good mechanical suppo

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Ai, Lisha, Yejing Wang, Gang Tao, et al. "Polydopamine-Based Surface Modification of ZnO Nanoparticles on Sericin/Polyvinyl Alcohol Composite Film for Antibacterial Application." Molecules 24, no. 3 (2019): 503. http://dx.doi.org/10.3390/molecules24030503.

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Silk sericin (SS) is a type of natural macromolecular protein with excellent hydrophilicity, biocompatibility and biodegradability, but also has very poor mechanical properties. To develop sericin-based wound dressings, we utilized polyvinyl alcohol (PVA) to reinforce the mechanical property of sericin by blending PVA and sericin, then modified zinc oxide nanoparticles (ZnO NPs) on SS/PVA film with the assistance of polydopamine (PDA) to endow SS/PVA film with antibacterial activity. Scanning electron microscopy, energy dispersive spectroscopy and X-ray powder diffraction demonstrated ZnO NPs

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Bi, Hongyan, Tianyi Feng, Binbin Li, and Yingchao Han. "In Vitro and In Vivo Comparison Study of Electrospun PLA and PLA/PVA/SA Fiber Membranes for Wound Healing." Polymers 12, no. 4 (2020): 839. http://dx.doi.org/10.3390/polym12040839.

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Wound dressings can accelerate wound healing. The degradable polymer poly(lactic acid) (PLA) shows good mechanical properties and biocompatibility. Sodium alginate (SA) holds good biocompatibility, hemostasis, and high hygroscopicity. Poly(vinyl alcohol) (PVA) has good spinnability as a pharmaceutical excipient. Herein, we carried out a comparison study of electrospun PLA and PLA/PVA/SA fiber membranes for wound healing in vitro and in vivo. In this study, PLA and PLA/PVA/SA nanofiber membranes were fabricated through electrospinning to produce a highly porous and large specific surface area t

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Fritsche, R., S. Thomas, and S. F. Perry. "EFFECTS OF SEROTONIN ON CIRCULATION AND RESPIRATION IN THE RAINBOW TROUT ONCORHYNCHUS MYKISS." Journal of Experimental Biology 173, no. 1 (1992): 59–73. http://dx.doi.org/10.1242/jeb.173.1.59.

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The effects of serotonin (5-hydroxytryptamine; 5-HT) on continuously recorded dorsal and ventral aortic blood pressures, (Pda, Pva), arterial oxygen tension (PaO2), arterial carbon dioxide tension (PaCO2), extracellular pH (pHa), buccal pressure (Pbuccal) and plasma catecholamine levels were investigated in rainbow trout, Oncorhynchus mykiss. Intra-arterial injections of serotonin (50–250 nmol kg-1) caused a rapid decrease in Pda and an increase in Pva, suggesting vasoconstriction of the branchial vasculature. The blood pressure changes were accompanied by a reduction in PaO2 (approximately 3–

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Sandoval-Herrera, Isela, Jorge Romero-García, Antonio Ledezma-Pérez, Carmen Alvarado-Canché, Román Torres-Lubian та Arxel De-León. "Controlled Release of Chlorogenic Acid from Polyvinyl Alcohol/Poly(γ-Glutamic Acid) Blended Electrospun Nanofiber Mats with Potential Applications in Diabetic Foot Treatment". Polymers 13, № 17 (2021): 2943. http://dx.doi.org/10.3390/polym13172943.

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This work biosynthesized poly(γ-glutamic acid) (γ-PGA) produced by Bacillus licheniformis ATCC-9945a. This material was utilized to prepare electrospun nanofibers with solutions of 10% polyvinyl alcohol (PVA) (w/v) mixed with γ-PGA at 5 and 10% w/v, intended as a wound dressing for diabetic foot treatment. These solutions were loaded with chlorogenic acid (CGA), an active hypoglycemic agent. Morphological analysis showed a decrease in size of the fibers with the combination of PVA/γ-PGA compared to pure PVA nanofibers, which was attributed to the hydrogen bonding interactions between the gluta

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Sachchu, Md Mazedul Haque, Fahim Khandokar Anik, Shanawaz Ahmed, et al. "Crystallographic Investigation of PVA@PLA Nanocomposite Film by X-ray Diffraction: Insight from High Resolution TEM." Journal of Engineering Research and Reports 27, no. 3 (2025): 310–27. https://doi.org/10.9734/jerr/2025/v27i31436.

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PLA-PVA films have desirable unique, unparalleled properties such as good oxygen and moisture barrier, excellent mechanical strength and low toxicity. The biodegradability of PLA and PVA offers a sustainable alternative to traditional plastic packaging. The PLA-PVA film stacking technology and its potential benefits for sustainable packaging. The XRD pattern of PVA exhibited sharp diffraction peaks at 20.0 ° and 41.0 °, reflecting its semi-crystalline nature, with the peak at 20.0 ° where a main diffraction of PLA was found around 16.5 °. PVA generally crystallizes in the monoclinic unit cell

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Yoshida, Kentaro, Akane Yamaguchi, Hiroki Midorikawa, et al. "Adsorption and Release of Rose Bengal on Layer-by-Layer Films of Poly(Vinyl Alcohol) and Poly(Amidoamine) Dendrimers Bearing 4-Carboxyphenylboronic Acid." Polymers 12, no. 8 (2020): 1854. http://dx.doi.org/10.3390/polym12081854.

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Phenylboronic acid-bearing polyamidoamine dendrimer (PBA-PAMAM)/poly(vinyl alcohol) (PVA) multilayer films were prepared through the layer-by-layer (LbL) deposition of PBA-PAMAM solution and PVA solution. PBA-PAMAM/PVA films were constructed successfully through the formation of boronate ester bonds between the boronic acid moiety in PBA and 1,3-diol units in PVA. When the (PBA-PAMAM/PVA)5 films were immersed in rose bengal (RB) solution, RB was adsorbed onto the LbL films. The amount of RB adsorbed was higher in the LbL films immersed in acidic solution than in basic solution. The release of

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El-Sisi, F. "Rheology and Removability of New Sizing Agents Based on Polyvinyl Alcohol." Engineering Plastics 4, no. 7 (1996): 147823919600400. http://dx.doi.org/10.1177/147823919600400706.

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Two synthetic sizing agents based on polyvinyl alcohol (PVA) were prepared by direct radiation of acrylic acid (AA) or N-vinyl-2-pyrrolidone (VP) in the presence of predissolved PVA. The rheology, film resolubility and removability of these sizing agents were compared with those of PVA. It was found that (a) the flow behaviour of 10% aqueous solutions (at 80°C) of these materials is characterized by a non-Newtonian thixotropic property that shows a measurable shear thinning character, (b) the degree of thixotropy is arranged ascendingly according to the order PVA/PVP < PVA/PAA < PVA, (c)

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El-Sisi, F. "Rheology and Removability of New Sizing Agents Based on Polyvinyl Alcohol." Polymers and Polymer Composites 4, no. 7 (1996): 513–17. http://dx.doi.org/10.1177/096739119600400706.

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Two synthetic sizing agents based on polyvinyl alcohol (PVA) were prepared by direct radiation of acrylic acid (AA) or N-vinyl-2-pyrrolidone (VP) in the presence of predissolved PVA. The rheology, film resolubility and removability of these sizing agents were compared with those of PVA. It was found that (a) the flow behaviour of 10% aqueous solutions (at 80°C) of these materials is characterized by a non-Newtonian thixotropic property that shows a measurable shear thinning character, (b) the degree of thixotropy is arranged ascendingly according to the order PVA/PVP < PVA/PAA < PVA, (c)

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Fatahian, Reyhaneh, Mohammad Mirjalili, Ramin Khajavi, Mohammad Karim Rahimi, and Navid Nasirizadeh. "A novel hemostat and antibacterial nanofibrous scaffold based on poly(vinyl alcohol)/poly(lactic acid)." Journal of Bioactive and Compatible Polymers 35, no. 3 (2020): 189–202. http://dx.doi.org/10.1177/0883911520913900.

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Today, an advanced wound dressing with the ability of blood clotting and antibacterial activity is the main subject of many studies to consider their necessity in modern society. In this study, it was aimed to present a novel scaffold with both abilities simultaneously. Poly(vinyl alcohol)/poly(lactic acid) nanofibrous scaffolds containing ceftriaxone antimicrobial agent (PVA-CTX/PLA) and tranexamic acid coagulant (PVA-CTX-TXA/PLA) were fabricated by electrospinning method. Morphology, antimicrobial activity, blood coagulation and bioavailability indexes, and swelling ability (gel formation) o

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Hashim, A., and A. Hadi. "Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization." Ukrainian Journal of Physics 63, no. 8 (2018): 754. http://dx.doi.org/10.15407/ujpe63.8.754.

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This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, a

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Paik, Ungyu, Vincent A. Hackley, Jaeho Lee, and Sangkyu Lee. "Effect of poly(acrylic acid) and poly(vinyl alcohol) on the solubility of colloidal BaTiO3 in an aqueous medium." Journal of Materials Research 18, no. 5 (2003): 1266–74. http://dx.doi.org/10.1557/jmr.2003.0174.

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The influence of poly(acrylic acid) (PAA) and poly(vinyl alcohol) (PVA) on Ba dissolution from the BaTiO3-aqueous solution interface was investigated. Incongruent dissolution of Ba impacts the colloidal stability, microstructure, and electrical properties of BaTiO3 and related perovskite dielectric materials used in the manufacture of ceramic capacitors. The solubility characteristics of BaTiO3 were influenced significantly by the presence of PAA and PVA. PAA, which forms weak monodentate complexes with Ba2+, acted as both a passivating and a sequestering agent, depending on pH. Both PAA and P

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Chou, Chun-Tu, Shih-Chen Shi, Tao-Hsing Chen, and Chih-Kuang Chen. "Nanocellulose-reinforced, multilayered poly(vinyl alcohol)-based hydrophobic composites as an alternative sealing film." Science Progress 106, no. 1 (2023): 003685042311571. http://dx.doi.org/10.1177/00368504231157142.

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A flexible, hydrophobic, and multilayered poly(vinyl alcohol) (PVA) film evolved to replace a commercially available nonbiodegradable easy seal-paper (ES-PAPER) sealing film. First, environmentally friendly fillers, such as cellulose nanocrystals (CNCs) or cellulose nanofibers (CNFs), were added to produce PVA + CNC/CNF composites via blade coating and solution casting to strengthen the mechanical properties of PVA. Subsequently, biodegradable and hydrophobic materials, such as poly(ethylene glycol)–poly(lactic acid) (PEG–PLA) and neat PLA, were added to prepare multilayered PEG–PLA and PLA hy

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Branco, Ana C., Andreia S. Oliveira, Inês Monteiro, et al. "PVA-Based Hydrogels Loaded with Diclofenac for Cartilage Replacement." Gels 8, no. 3 (2022): 143. http://dx.doi.org/10.3390/gels8030143.

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Polyvinyl alcohol (PVA) hydrogels have been widely studied for cartilage replacement due to their biocompatibility, chemical stability, and ability to be modified such that they approximate natural tissue behavior. Additionally, they may also be used with advantages as local drug delivery systems. However, their properties are not yet the most adequate for such applications. This work aimed to develop new PVA-based hydrogels for this purpose, displaying improved tribomechanical properties with the ability to control the release of diclofenac (DFN). Four types of PVA-based hydrogels were prepar

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Guo, Zheng, Zebo Wang, Yajie Qin, et al. "Fabrication of biodegradable nanofibers via melt extrusion of immiscible blends." e-Polymers 22, no. 1 (2022): 733–41. http://dx.doi.org/10.1515/epoly-2022-0059.

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Abstract Polylactic acid (PLA) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-co-4HB)) nanofibers were prepared by melt extrusion of immiscible blends of PLA/polyvinyl alcohol (PVA) and P(3HB-co-4HB)/PVA via in situ formation of microfibrils during the melt extrusion process. The morphology of the blends and nanofibers after removal of PVA with water was studied using scanning electron microscopy. The intermolecular interactions in the blends were studied by Fourier-transform infrared spectroscopy. The compatibility of the components of the PVA/PLA blends was better than that of the P

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Lee, Ha-Na, Jae-Woong Lee, Ji-Young Kim, Won-Chul Lee, and Sam-Soo Kim. "Interfacial Electric Property of PVA/PVAc Particles." Textile Coloration and Finishing 20, no. 6 (2008): 8–17. http://dx.doi.org/10.5764/tcf.2008.20.6.008.

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Wei, Liao, Shuyue Ma, Mengyuan Hao, Lanrong Ma, and Xiang Lin. "Modifying Anti-Compression Property and Water-Soluble Ability of Polyglycolic Acid via Melt Blending with Polyvinyl Alcohol." Polymers 14, no. 16 (2022): 3375. http://dx.doi.org/10.3390/polym14163375.

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Biodegradable polymeric materials have become the most attractive research interest in recent years and are gradually widely used in various fields in the case of environmental pollution. In this paper, binary blends, mainly including varying contents of polyglycolic acid (PGA) and poly(vinyl alcohol) (PVA), were prepared via a melt compounding strategy. The ethylene-methyl acrylate-glycidyl methacrylate (EMA-GMA) was employed as the compatibilizer to improve the compatibility between the PGA and PVA and the polyolefin elastomer (POE) was used as toughening agent. The anti-compression property

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Jucius, Lazauskas, and Gudaitis. "Multiple Hydrogen-Bonding Assisted Scratch–Healing of Transparent Coatings." Coatings 9, no. 12 (2019): 796. http://dx.doi.org/10.3390/coatings9120796.

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The partial cross-linking reaction of poly(vinyl alcohol) (PVA) by esterification using poly(acrylic acid) (PAA) as a cross-linking agent was performed to obtain a PVA–PAA supramolecular polymer complex. The PVA–PAA coatings with a different molar ratio between hydroxyl and carboxyl groups were prepared to examine scratch–healing ability. These coatings exhibited high optical transparency and excellent scratch–healing properties, which are attributed to considerable amount of free hydroxyl groups at the scratched interfaces to reversibly form multiple hydrogen bonds. Importantly, the PVA–PAA p

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Hu, Ying, Hui Yu, Zhiyong Yan, and Qinfei Ke. "The surface chemical composition effect of a polyacrylic acid/polyvinyl alcohol nanofiber/quartz crystal microbalance sensor on ammonia sensing behavior." RSC Advances 8, no. 16 (2018): 8747–54. http://dx.doi.org/10.1039/c7ra13006f.

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Sahoo, Prafulla Kumar, Pradeep Kumar Rana, and Sarat Kumar Swain. "Interpenetrating Polymer Network PVA/PAA Hydrogels." International Journal of Polymeric Materials 55, no. 1 (2006): 65–78. http://dx.doi.org/10.1080/009140390916440.

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Stannek, M., and H. J. Bart. "Adsorptionsverhalten in imprägnierte PVA/PAA-Hydrogele." Chemie Ingenieur Technik 81, no. 8 (2009): 1084. http://dx.doi.org/10.1002/cite.200950593.

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Shahrul Nizam, Mohd Salleh, Norzila Mohd, Zarina Omar, and Norkamruzita Saadon. "Comparison of Starch Fiber Filled-Polyvinyl Alcohol and Native Starch Filled-Polyvinyl Alcohol under Tensile Analysis." Advanced Materials Research 1113 (July 2015): 19–22. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.19.

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The tensile properties of starch fiber (SF) and native starch (NS) filled polyvinyl alcohol were investigated in this study. Polyvinyl Alcohol (PVA) was blend with starch fiber as well as native starch. Prior to compounding process, PVA was plasticized with 30 phr glycerol as well as 10 phr distilled water. A solution casting method was used to prepare the SF-PPVA and NS-PPVA film sheet. Based on the tensile test results SF filled PVA recorded the highest tensile strength (20.015 MPa) as compared to NS filled PVA (12.302MPa). The tensile strength of the blends film was depending to the interfa

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Shar, Abdul Shakoor, Caili Zhang, Xieqing Song, Yunxuan Weng, and Qiuyue Du. "Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers." Polymers 13, no. 22 (2021): 3962. http://dx.doi.org/10.3390/polym13223962.

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Polymer/clay composites are an innovative class of materials. In this study, we present a facile method for the preparation of biodegradable and robust PLA/organomodified montmorillonite (OMMT) composite films with excellent gas barrier performance. When the design of PLA/OMMT composite films, in addition to making OMMT have good intercalation effect in the matrix, the compatibility of intercalating polymer and matrix should also be considered. In this work, two polymers with high gas barrier properties, namely poly(vinyl alcohol) (PVA) and ethylene vinyl alcohol copolymer (EVOH), were selecte

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Zhu, Yanping, Yuxuan Cao, Shihu Shu, et al. "Comparison of Medium-Pressure UV/Peracetic Acid to Remove Three Typical Refractory Contaminants of Textile Wastewater." Processes 11, no. 4 (2023): 1183. http://dx.doi.org/10.3390/pr11041183.

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In this work, the performance of medium-pressure UV/peracetic acid (MPUV/PAA/H2O2) was explored on removing reactive black 5 (RB5), aniline (ANL), and polyvinyl alcohol (PVA), three typical refractory contaminants in printing and dyeing wastewater, compared with MPUV/H2O2. MPUV/PAA/H2O2 showed 75.0, 44.9, and 57.7% removals of RB5, ANL, and PVA, respectively, within 5 min. The removal of RB5 increased from 68.98 to 91.2%, with pH increasing from 6 to 9, while the removals of ANL and PVA were much less pH-dependent. Quenching experiment results indicated that UV photolysis and radical (i.e., •O

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Wongthep, Wilairat, Chaiwat Ruksakulpiwat, and Sittipong Amnuaypanich. "Membranes Prepared from a Blend of Poly(acrylic Acid) and Natural Rubber-Graft-Poly(vinyl Alcohol) (PAA/NR-g-PVA)." Advanced Materials Research 93-94 (January 2010): 268–71. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.268.

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The blend membranes from PAA and NR-graft-PVA were prepared. By introducing potassium persulfate (KPS) initiator, PVA can be chemically attached to the NR latex particles which was confirmed by FT-IR spectroscopy. Most of added-PVA was grafted on the NR latex particles as indicated by the almost-linear increasing of grafting percentage. The swelling of the PAA/NR-g-PVA blend membranes was performed in different concentrations of water-ethanol solutions. For the water concentration lesser than 30 vol.%, all membranes showed almost no-swelling but beyond 30 vol.% water, the degree of swelling re

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Bron, A. J., H. Mangat, M. Quinlan, et al. "Polyacrylic Acid Gel in Patients with Dry Eyes: A Randomised Comparison with Polyvinyl Alcohol." European Journal of Ophthalmology 8, no. 2 (1998): 81–89. http://dx.doi.org/10.1177/112067219800800206.

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Purpose To compare the safety and efficacy of polyacrylic acid 0.2% (PAA) gel and polyvinylalcohol 1.4% (PVA) in the treatment of patients with dry eyes. Methods Eighty-nine patients with dry eyes were randomly allocated to treatment with either PAA (48) or PVA (41) in a prospective, investigator-masked study in two centres. The parameters assessed were daily frequency of instillation of the study medications, ocular signs and symptoms, tear film break up time, Schirmer's test values, local tolerance and global assessment of the improvement following treatment. Results The two groups were simi

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Mohammed, Nadheer J., Zahraa S. Rasheed, and Ashraf S. Hassan. "Improvement Optical Properties of PVA/ TiO2 and PVA/ ZnO Nanocomposites." Al-Mustansiriyah Journal of Science 29, no. 3 (2019): 118. http://dx.doi.org/10.23851/mjs.v29i3.629.

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The optical properties of polyvinyl alcohol (PVA) doped TiO2 and ZnO nanoparticles respectively, were studied. PVA/TiO2 and PVA/ZnO nanoparticles were prepared by the pulsed laser ablation technique (PLA).The optical properties of PVA/ TiO2 and PVA/ ZnO nanocomposite solution have been investigated by transmittance data and absorption spectra. The optical band gap (Eg) was determined and the optical absorption spectra showed that a direct transition. The energy gap of PVA/ ZnO nanoparticles have been observed the decreases its value and increasing in the optical conductivity as compared to PVA

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Kim, Jong Won, and Jin-Hae Chang. "Syntheses of Colorless and Transparent Polyimide Membranes for Microfiltration." Polymers 12, no. 7 (2020): 1610. http://dx.doi.org/10.3390/polym12071610.

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Herein, poly(amic acid) (PAA) was synthesized using 4,4’-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) as a dianhydride and 2,2-bis(3-aminophenyl)hexafluoropropane (6FAm) and 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (6FAm-OH) as diamines. Poly(vinyl alcohol) (PVA) at various contents (0–5.0 wt%) was blended with PAA to prepare a composite material. Then, colorless and transparent polyimide (CPI) composite films were prepared by applying various stages of heat treatment using the PAA/PVA blend film as a precursor. These film-type composites were immersed in water to completely

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Maior, Ioana, Ana Maria Albu, and Raluca Gabor. "New Polymer Assembles with Potential Use as Solid Electrolytes Type Membranes." Applied Mechanics and Materials 760 (May 2015): 245–50. http://dx.doi.org/10.4028/www.scientific.net/amm.760.245.

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Solid polymer electrolyte (SPE) membranes with varying composition ratios were prepared from poly(vinyl alcohol) (PVA), poly(acrylic acid) (PAA) and poly(metacrylic acid) (PMMA). The acrylic acid monomer with cross-linker was first blended with PVA polymer. A free radical polymerization was then carried out to form an alkaline polymer electrolyte. The solution casting method was used to form the solid polymer membranes. The solid polymer membranes were characterized by FT-IR spectroscopy, SEM morphology analysis and electrochemical impedance spectroscopy. The results showed that at room temper

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Dina Permata, Wijaya, Shiyan Shaum, Hadiani Nabilah Putri, Herlina Herlina, and Wardana Mutia Sari. "OPTIMIZATION OF BUTTERFLY PEA EXTRACT PEEL-OFF MASK WITH VARIATIONS OF POLYVINYL ALCOHOL AND IOTA CARRAGEENAN USING FACTORIAL DESIGN." Pharmacoscript 8, no. 1 (2025): 1–20. https://doi.org/10.36423/pharmacoscript.v8i1.1798.

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ABSTRACT The butterfly pea flower (Clitoria ternatea) contains antioxidants that help combat premature skin aging. Peel-off masks are popular with consumers as topical formulations because they are unique and practical. An essential component of peel-off masks is the gelling agent Polyvinyl Alcohol (PVA), which acts as a film-forming agent. However, PVA at the wrong concentration can result poor mask physical properties. Combining PVA with other gelling agents can obtain peel-off masks with better physical properties. This study aims to identify the effect of PVA and iota carrageenan on the op

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Zahra, Fatima T., Quincy Quick, and Richard Mu. "Electrospun PVA Fibers for Drug Delivery: A Review." Polymers 15, no. 18 (2023): 3837. http://dx.doi.org/10.3390/polym15183837.

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Innovation in biomedical science is always a field of interest for researchers. Drug delivery, being one of the key areas of biomedical science, has gained considerable significance. The utilization of simple yet effective techniques such as electrospinning has undergone significant development in the field of drug delivery. Various polymers such as PEG (polyethylene glycol), PLGA (Poly(lactic-co-glycolic acid)), PLA(Polylactic acid), and PCA (poly(methacrylate citric acid)) have been utilized to prepare electrospinning-based drug delivery systems (DDSs). Polyvinyl alcohol (PVA) has recently g

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He, Yunxia, Yuay Yuan, Yuanyuan Gao, et al. "Enhancement of Colorimetric pH-Sensitive Film Incorporating Amomum tsao-ko Essential Oil as Antibacterial for Mantis Shrimp Spoilage Tracking and Fresh-Keeping." Foods 13, no. 11 (2024): 1638. http://dx.doi.org/10.3390/foods13111638.

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Anthocyanin-based smart packaging has been widely used for food freshness monitoring, but it cannot meet the requirements of smart films with antibacterial properties. This study aimed to enhance the antibacterial properties of intelligent films by incorporating Amomum tsao-ko essential oil (AEO) for mantis shrimp spoilage tracking and keeping the product fresh. A smart film was designed by introducing AEO and purple potato anthocyanin (PPA) to a polyvinyl alcohol/cellulose nanocrystal (PVA/CNC) polymer matrix. Our findings revealed that APP and AEO imparted the smart film with a favorable oxy

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Shu, Xiaobo, Liping Wan, and Mubai Duan. "Persistent inhibition performance of amine polymers to inhibit clay swelling." Journal of Polymer Engineering 38, no. 4 (2018): 323–31. http://dx.doi.org/10.1515/polyeng-2016-0428.

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AbstractClay hydration and swelling can cause shale instability in the drilling of oil and gas wells. The persistent inhibition performance of polyether amine (PEA) and poly(vinyl alcohol-g-dimethyl aminopropyl methacrylamide) (PVA-g-DMAPMA) as amine clay inhibitors has been investigated through hot rolling dispersion test, bulk hardness test, and bentonite inhibition test. The micro-mechanism has also been explained by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and X-ray diffraction (XRD) analyses. Through the interact

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Seo, Young-Ho, Jae-Man Lee, Sun-Young Park, Myung-Hoo Kim, Seon-Beom Kim, and Tae-Hwan Oh. "PVA Hydrogels Supplemented with PLA Mesh for Tissue Regeneration Scaffold." Gels 10, no. 6 (2024): 364. http://dx.doi.org/10.3390/gels10060364.

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This study examined the tensile strength and biocompatibility properties of polyvinyl alcohol (PVA) hydrogel tissue regeneration scaffolds with polylactic acid (PLA) mesh fabric added as reinforcement, with a focus on the impact of heat treatment temperature and the number of layers of the PLA mesh fabric. The hydrogel scaffolds were prepared using a freeze–thaw method to create PVA hydrogel, with the PLA mesh fabric placed inside the hydrogel. The swelling ratio of the PVA/PLA hydrogel scaffolds decreased with increasing layer number and heat treatment temperature of the PLA mesh. The gel str

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Stannek, M., and H. J. Bart. "Molecular Recognition Within Imprinted PVA/PAA Hydrogels." Chemie Ingenieur Technik 80, no. 9 (2008): 1440. http://dx.doi.org/10.1002/cite.200750818.

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Liu, Chang, Yi-nan Wu, Aimin Yu, and Fengting Li. "Cooperative fabrication of ternary nanofibers with remarkable solvent and temperature resistance by electrospinning." RSC Adv. 4, no. 59 (2014): 31400–31408. http://dx.doi.org/10.1039/c4ra03633f.

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PVA/PAA/SiO<sub>2</sub> ternary organic–inorganic composite nanofibrous mats are successfully prepared by a cooperative fabrication via electrospinning. The reaction between PVA, PAA and hydrolytic TEOS are proposed to endow the ternary nanofibers with remarkable solvent and temperature resistance, as well as the great mechanical property.

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Vrouvaki, Ilianna, Eleni Koutra, Michael Kornaros, Konstantinos Avgoustakis, Fotini N. Lamari, and Sophia Hatziantoniou. "Polymeric Nanoparticles of Pistacia lentiscus var. chia Essential Oil for Cutaneous Applications." Pharmaceutics 12, no. 4 (2020): 353. http://dx.doi.org/10.3390/pharmaceutics12040353.

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Polymeric nanoparticles (NPs) encapsulating Pistacia lentiscus L. var. chia essential oil (EO) were prepared by a solvent evaporation method, in order to obtain a novel carrier for administration on the skin. The specific EO exhibits antimicrobial and anti-inflammatory properties thus stimulating considerable interest as a novel agent for the treatment of minor skin inflammations. The incorporation into nanoparticles could overcome the administration limitations that inserts the nature of the EO. Nanoparticles were prepared, utilizing poly(lactic acid) (PLA) as shell material, due to its bioco

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Liu, Yanping, Hanghang Wei, Zhen Wang, Qian Li, and Nan Tian. "Simultaneous Enhancement of Strength and Toughness of PLA Induced by Miscibility Variation with PVA." Polymers 10, no. 10 (2018): 1178. http://dx.doi.org/10.3390/polym10101178.

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The mechanical properties of poly (lactic acid) (PLA) nanofibers with 0%, 5%, 10%, and 20% (w/w) poly (vinyl alcohol) (PVA) were investigated at the macro- and microscale. The macro-mechanical properties for the fiber membrane revealed that both the modulus and fracture strain could be improved by 100% and 70%, respectively, with a PVA content of 5%. The variation in modulus and fracture strain versus the diameter of a single electrospun fiber presented two opposite trends, while simultaneous enhancement was observed when the content of PVA was 5% and 10%. With a diameter of 1 μm, the strength

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Chou, Chun-Tu, Shih-Chen Shi, and Chih-Kuang Chen. "Sandwich-Structured, Hydrophobic, Nanocellulose-Reinforced Polyvinyl Alcohol as an Alternative Straw Material." Polymers 13, no. 24 (2021): 4447. http://dx.doi.org/10.3390/polym13244447.

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An environmentally friendly, hydrophobic polyvinyl alcohol (PVA) film was developed as an alternative to commercial straws for mitigating the issue of plastic waste. Nontoxic and biodegradable cellulose nanocrystals (CNCs) and nanofibers (CNFs) were used to prepare PVA nanocomposite films by blade coating and solution casting. Double-sided solution casting of polyethylene-glycol–poly(lactic acid) (PEG–PLA) + neat PLA hydrophobic films was performed, which was followed by heat treatment at different temperatures and durations to hydrophobize the PVA composite films. The hydrophobic characterist

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Wang, Jiamin, Tiantian Yang, Shaodi Zhang, and Jinzhen Cao. "Application of polyvinyl alcohol (PVA) as a toughening agent in wood furfurylation." Holzforschung 76, no. 4 (2022): 380–90. http://dx.doi.org/10.1515/hf-2021-0144.

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Abstract In order to explore the application of furfurylated wood as engineering material, polyvinyl alcohol (PVA) was proposed as a toughening agent to incorporate with furfuryl alcohol (FA) to form FA/PVA precursor and impregnate wood in a one-step method. After in situ polymerization upon heating, a hydrophobic network composed of polyfurfuryl alcohol (PFA) and PVA was formed within the wood scaffold. The impact toughness, as well as some water-related properties of modified wood including the contact angle, water absorption, moisture adsorption, and dimensional stability were investigated

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Rieagnam, P., P. Jaisabai, K. Wongkhan, and R. Jitchati. "Smart sensing film developed by polyvinyl alcohol/carboxymethyl cellulose doped with anthocyanin extract as a natural pH indicator." IOP Conference Series: Materials Science and Engineering 1325, no. 1 (2025): 012005. https://doi.org/10.1088/1757-899x/1325/1/012005.

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Abstract This research focused on developing a pH-responsive film based on a poly(vinyl alcohol)/carboxymethyl cellulose (PVA/CMC) composite combined with anthocyanin, a natural pH indicator extracted from butterfly pea flower (ABA). Coconut husks were treated and bleached with NaOH and H2O2 before undergoing carboxymethylation. The bleached coconut husks were converted into CMC through alkalization, followed by etherification with NaOH and ClCH2COOH in an alcoholic medium. The CMC/PVA film, incorporating ABA as a natural pH indicator, was prepared via casting with varying anthocyanin contents

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Azevedo, Júlia Santos, Iasmin Ferreira de Souza, Carlos Nelson Elias, Victor Talarico Leal Vieira, Paulo Henrique de Souza Picciani, and Fabiano Luiz Heggendorn. "BIOFUNCIONALIZAÇÃO DE IMPLANTES DENTÁRIOS COM MEMBRANAS DE PVA E PLA VIA SOLUTION BLOW SPINNING: POTENCIAL TERAPÊUTICO PARA PERI-IMPLANTITE." Revista ft 29, no. 147 (2025): 09–10. https://doi.org/10.69849/revistaft/ch10202506151009.

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The aim of this study was to synthesize and characterize polymeric membranes of poly(lactic acid) (PLA) and poly(vinyl alcohol) (PVA), deposited in situ on the surfaces of dental implants used by the solution blow spinning (SBS) technique, evaluating their microstructural and adhesive properties for the development of therapeutic agents in peri-implantitis. Dental implants extracted from patients were coated with 10% (w/v) PLA and PVA solutions, applied with an airbrush under controlled conditions. Morphological and microstructural analysis by scanning electron microscopy revealed that PLA for

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Wu, Yue, Kewei Zhao, Jingliu Wang, et al. "Five-Cavity Resonance Inspired, rGO Nano-Sheet Reinforced, Multi-Site Voice Synergetic Detection Hydrogel Sensors with Diverse Self-Adhesion and Robust Wireless Transmissibility." Gels 11, no. 4 (2025): 233. https://doi.org/10.3390/gels11040233.

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The practical application of flexible sensors in sound detection is significantly hindered by challenges such as information isolation, fragmentation, and low fidelity. To address these challenges, this work developed a composite hydrogel via a one-pot method, employing polyvinyl alcohol (PVA) as the first network, polyacrylic acid (PAA) as the second network, and two-dimensional nanomaterials—reduced graphene oxide (rGO)—generated through the redox reaction of polydopamine (PDA) and graphene oxide (GO) as conductive fillers. The uniformly distributed rGO within the hydrogel forms an efficient

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Emiliane, D. Pereira, da Silva Cardoso Jéssica, Magalhães dos Santos Jéssica, and G. Souza Fernando. "One pot-synthesis of poly(lactic acid-g-vinyl alcohol)." Abstracts of International Conferences & Meetings (AICM) 1, no. 2 (2021): 9. https://doi.org/10.5281/zenodo.4876606.

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<strong>Introduction:</strong> Optimal Controlled drug delivery systems should be able to release the drug in a controlled manner, biocompatible, inert, and capable of achieving a high drug loading (1-5). Among the materials used in the controlled release, polyesters such as polylactic acid (PLA) stands out because of its properties and due to the FDA approval for human use (6-10). However, because of its low polarity, the interaction between this polymer and some drugs is impaired. To perform a copolymerization with more hydrophilic polymers such as polyvinyl alcohol (PVA) is an alternative.

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Yu, Jiali, Shihu Shu, Qiongfang Wang, Naiyun Gao, and Yanping Zhu. "Evaluation of Fe2+/Peracetic Acid to Degrade Three Typical Refractory Pollutants of Textile Wastewater." Catalysts 12, no. 7 (2022): 684. http://dx.doi.org/10.3390/catal12070684.

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In this work, the degradation performance of Fe2+/PAA/H2O2 on three typical pollutants (reactive black 5, ANL, and PVA) in textile wastewater was investigated in comparison with Fe2+/H2O2. Therein, Fe2+/PAA/H2O2 had a high removal on RB5 (99%) mainly owing to the contribution of peroxyl radicals and/or Fe(IV). Fe2+/H2O2 showed a relatively high removal on PVA (28%) mainly resulting from ·OH. Fe2+/PAA/H2O2 and Fe2+/H2O2 showed comparative removals on ANL. Additionally, Fe2+/PAA/H2O2 was more sensitive to pH than Fe2+/H2O2. The coexisting anions (20–2000 mg/L) showed inhibition on their removals

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Ge, Xin, Wei-Jie Liang, Jian-Fang Ge, et al. "Hexagonal Boron Nitride/Microfibril Cellulose/Poly(vinyl alcohol) Ternary Composite Film with Thermal Conductivity and Flexibility." Materials 12, no. 1 (2018): 104. http://dx.doi.org/10.3390/ma12010104.

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Microfibril cellulose (MFC), which is detrimental to soil cultivation and environmental protection, is derived from waste pineapple leaves. Hexagonal boron nitride (h-BN) was modified with polydopamine (PDA)—PDA@h-BN named pBN, and then combined with MFC to prepare a novel hybrid powder. The effect of PDA on h-BN and the binding effect between pBN and MFC were characterized by X-ray photoelectron spectroscopy (XPS), Thermogravimetric (TG), scanning electron microscopy (SEM), and Fourier Transform-Infrared (FT-IR). Poly (vinyl alcohol) (PVA) was used as an eco-friendly polymeric matrix to prepa

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Tahir, Muhammad, Silvia Vicini, Tomasz Jędrzejewski, Sylwia Wrotek, and Alina Sionkowska. "New Composite Materials Based on PVA, PVP, CS, and PDA." Polymers 16, no. 23 (2024): 3353. http://dx.doi.org/10.3390/polym16233353.

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In this work, new materials based on the blends of polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), chitosan (CS), and polydopamine (PDA) have been prepared. Fourier Transform Infrared Spectra have been conducted to verify the presence of individual components in the composite materials. EDX elemental analysis showed a clear view of the element’s presence in the composite materials, with the maximum values for carbon and oxygen. Atomic force microscopy (AFM) was used to observe the surface topography and measure the surface roughness. In the case of the individual polymers, CS presented t

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