Relevant bibliographies by topics / Bio-based polyol

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Bio-based polyol'

Author: Grafiati
Published: 3 June 2025
Last updated: 22 June 2025

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Journal articles on the topic "Bio-based polyol"

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Lee, Joo Hyung, Seong Hun Kim, and Kyung Wha Oh. "Bio-Based Polyurethane Foams with Castor Oil Based Multifunctional Polyols for Improved Compressive Properties." Polymers 13, no. 4 (2021): 576. http://dx.doi.org/10.3390/polym13040576.

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Currently, most commercial polyols used in the production of polyurethane (PU) foam are derived from petrochemicals. To address concerns relating to environmental pollution, a sustainable resource, namely, castor oil (CO), was used in this study. To improve the production efficiency, sustainability, and compressive strength of PU foam, which is widely used as an impact-absorbing material for protective equipment, PU foam was synthesized with CO-based multifunctional polyols. CO-based polyols with high functionalities were synthesized via a facile thiol-ene click reaction method and their chemical structures were analyzed. Subsequently, a series of polyol blends of castor oil and two kinds of castor oil-based polyols with different hydroxyl values was prepared and the viscosity of the blends was analyzed. Polyurethane foams were fabricated from the polyol blends via a free-rising method. The effects of the composition of the polyol blends on the structural, morphological, mechanical, and thermal properties of the polyurethane foams were investigated. The results demonstrated that the fabrication of polyurethane foams from multifunctional polyol blends is an effective way to improve their compressive properties. We expect these findings to widen the range of applications of bio-based polyurethane foams.
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Kirpluks, Mikelis, Edgars Vanags, Arnis Abolins, Slawomir Michalowski, Anda Fridrihsone, and Ugis Cabulis. "High Functionality Bio-Polyols from Tall Oil and Rigid Polyurethane Foams Formulated Solely Using Bio-Polyols." Materials 13, no. 8 (2020): 1985. http://dx.doi.org/10.3390/ma13081985.

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High-quality rigid polyurethane (PU) foam thermal insulation material has been developed solely using bio-polyols synthesized from second-generation bio-based feedstock. High functionality bio-polyols were synthesized from cellulose production side stream—tall oil fatty acids by oxirane ring-opening as well as esterification reactions with different polyfunctional alcohols, such as diethylene glycol, trimethylolpropane, triethanolamine, and diethanolamine. Four different high functionality bio-polyols were combined with bio-polyol obtained from tall oil esterification with triethanolamine to develop rigid PU foam formulations applicable as thermal insulation material. The developed formulations were optimized using response surface modeling to find optimal bio-polyol and physical blowing agent: c-pentane content. The optimized bio-based rigid PU foam formulations delivered comparable thermal insulation properties to the petro-chemical alternative.
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Fridrihsone, Anda, Arnis Abolins, and Mikelis Kirpluks. "Screening Life Cycle Assessment of Tall Oil-Based Polyols Suitable for Rigid Polyurethane Foams." Energies 13, no. 20 (2020): 5249. http://dx.doi.org/10.3390/en13205249.

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A screening Life Cycle Assessment (LCA) of tall oil-based bio-polyols suitable for rigid polyurethane (PU) foams has been carried out. The goal was to identify the hot-spots and data gaps. The system under investigation is three different tall oil fatty acids (TOFA)-based bio-polyol synthesis with a cradle-to-gate approach, from the production of raw materials to the synthesis of TOFA based bio-polyols at a pilot-scale reactor. The synthesis steps that give the most significant environmental footprint hot-spots were identified. The results showed the bio-based feedstock was the main environmental hot-spot in the bio-polyol production process. Future research directions have been highlighted.
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Čuk, Nataša, Miha Steinbücher, Nejc Vidmar, Martin Ocepek, and Peter Venturini. "Fully Bio-Based and Solvent-Free Polyester Polyol for Two-Component Polyurethane Coatings." Coatings 13, no. 10 (2023): 1779. http://dx.doi.org/10.3390/coatings13101779.

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In recent years, many efforts are being devoted to the development of new materials that originate from renewable resources. Polyesters are one of the most important classes of such materials and several bio-based monomers are available for their synthesis. In this work, the development of fully bio-based and solvent-free polyester polyol used for two-component polyurethane coatings on industrial scale is presented. Fossil-based raw materials were substituted with bio-based alternatives that are commercially available on a large scale. Properties of polyols and coatings were determined and measured. Polyols were characterized by the determination of acid number, hydroxyl number, glass transition temperature and refractive index, and measurement of viscosity, color and molecular weight. Coatings were characterized by the determination of mechanical properties, such as hardness, elasticity and impact resistance, and the measurement of optical properties such as gloss, haze, distinctness of image (DOI) and reflected image quality (RIQ) and weathering resistance. Three variations of bio-based polyol were synthesized, then the most suitable version was validated in a clear coat. The results showed that the properties of the bio-based polyol and coating met the requirements and were comparable to the properties of the synthetic counterpart. Results indicate that this newly developed 100% bio-based and solvent-free polyol can be used as a drop-in replacement for synthetic polyol. Furthermore, this work implies that the supply chain is established which allows the green transition in the paint industry.
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Ji, Dong, Zheng Fang, Zhi Dong Wan, et al. "Rigid Polyurethane Foam Based on Modified Soybean Oil." Advanced Materials Research 724-725 (August 2013): 1681–84. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.1681.

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Two bio-based polyols (Polyol-r and Polyol-t) were synthesized from commercially available epoxidized soybean oil (ESBO). Polyol-r was obtained from ring opening of ESBO in the presence of fluoboric acid, while Polyol-t from a transesterification of Polyol-r with glycerol through a litharge catalyst. A rigid polyurethane foam was prepared by mixed polyols (Polyol-t and commercial 635 polyether polyol) with 4,4'-methylene-bis (phenyl isocyanate). The hydroxyl value of Polyol-t was higher than that of Polyol-r, which was also backed up by Fourier transform infrared spectrometry. Scanning electron microscope examination revealed that the foam has closed cells. The test of performances of the foam shows that it possesses an excellent dimension stability and compressive strength.
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Prociak, Aleksander, Michał Kucała, Maria Kurańska, and Mateusz Barczewski. "Effect of Selected Bio-Components on the Cell Structure and Properties of Rigid Polyurethane Foams." Polymers 15, no. 18 (2023): 3660. http://dx.doi.org/10.3390/polym15183660.

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New rigid polyurethane foams (RPURFs) modified with two types of bio-polyols based on rapeseed oil were elaborated and characterized. The effect of the bio-polyols with different functionality, synthesized by the epoxidation and oxirane ring-opening method, on the cell structure and selected properties of modified foams was evaluated. As oxirane ring-opening agents, 1-hexanol and 1.6-hexanediol were used to obtain bio-polyols with different functionality and hydroxyl numbers. Bio-polyols in different ratios were used to modify the polyurethane (PUR) composition, replacing 40 wt.% petrochemical polyol. The mass ratio of the used bio-polyols (1:0, 3:1, 1:1, 1:3, 0:1) affected the course of the foaming process of the PUR composition as well as the cellular structure and the physical and mechanical properties of the obtained foams. In general, the modification of the reference PUR system with the applied bio-polyols improved the cellular structure of the foam, reducing the size of the cells. Replacing the petrochemical polyol with the bio-polyols did not cause major differences in the apparent density (40–43 kg/m3), closed-cell content (87–89%), thermal conductivity (25–26 mW⋅(m⋅K)−1), brittleness (4.7–7.5%), or dimensional stability (<0.7%) of RPURFs. The compressive strength at 10% deformation was in the range of 190–260 and 120–190 kPa, respectively, for directions parallel and perpendicular to the direction of foam growth. DMA analysis confirmed that an increase in the bio-polyol of low functionality in the bio-polyol mixture reduced the compressive strength of the modified foams.
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Niesiobędzka, Joanna, Ewa Głowińska, and Janusz Datta. "Eco-Friendly Ether and Ester-Urethane Prepolymer: Structure, Processing and Properties." International Journal of Molecular Sciences 22, no. 22 (2021): 12207. http://dx.doi.org/10.3390/ijms222212207.

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This study concerns bio-based urethane prepolymers. The relationship between the chemical structure and the thermal and processing parameters of bio-based isocyanate-terminated ether and ester-urethane prepolymers was investigated. Bio-based prepolymers were obtained with the use of bio-monomers such as bio-based diisocyanate, bio-based polyether polyol or polyester polyols. In addition to their composition, the bio-based prepolymers were different in the content of iso-cyanate groups content (ca. 6 and 8%). The process of pre-polymerization and the obtained bio-based prepolymers were analyzed by determining the content of unreacted NCO groups, Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, thermogravimetry, and rheological measurements. The research conducted facilitated the evaluation of the properties and processability of urethane prepolymers based on natural components. The results indicate that a significant impact on the processability has the origin the polyol ingredient as well as the NCO content. The thermal stability of all of the prepolymers is similar. A prepolymer based on a poly-ether polyol is characterized by a lower viscosity at a lower temperature than the prepolymer based on a polyester polyol. The viscosity value depends on the NCO content.
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Coccia, Francesca, Liudmyla Gryshchuk, Pierluigi Moimare, et al. "Chemically Functionalized Cellulose Nanocrystals as Reactive Filler in Bio-Based Polyurethane Foams." Polymers 13, no. 15 (2021): 2556. http://dx.doi.org/10.3390/polym13152556.

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Cellulose Nanocrystals, CNC, opportunely functionalized are proposed as reactive fillers in bio-based flexible polyurethane foams to improve, mainly, their mechanical properties. To overcome the cellulose hydrophilicity, CNC was functionalized on its surface by linking covalently a suitable bio-based polyol to obtain a grafted-CNC. The polyols grafted with CNC will react with the isocyanate in the preparation of the polyurethane foams. An attractive way to introduce functionalities on cellulose surfaces in aqueous media is silane chemistry by using functional trialkoxy silanes, X-Si (OR)3. Here, we report the synthesis of CNC-grafted-biopolyol to be used as a successful reactive filler in bio-based polyurethane foams, PUFs. The alkyl silanes were used as efficient coupling agents for the grafting of CNC and bio-polyols. Four strategies to obtain CNC-grafted-polyol were fine-tuned to use CNC as an active filler in PUFs. The effective grafting of the bio polyol on CNC was evaluated by FTIR analysis, and the amount of grafted polyol by thermogravimetric analysis. Finally, the morphological, thermal and mechanical properties and hydrophobicity of filled PUFs were thoughtfully assessed as well as the structure of the foams and, in particular, of the edges and walls of the cell foams by means of the Gibson–Ashby model. Improved thermal stability and mechanical properties of PU foams containing CNC-functionalized-polyol are observed. The morphology of the PU foams is also influenced by the functionalization of the CNC.
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Paciorek-Sadowska, Joanna, Marcin Borowicz, and Marek Isbrandt. "New Poly(lactide-urethane-isocyanurate) Foams Based on Bio-Polylactide Waste." Polymers 11, no. 3 (2019): 481. http://dx.doi.org/10.3390/polym11030481.

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The article presents the results of research on the synthesis of a new eco-polyol based on polylactide (PLA) waste and its use for the production of rigid polyurethane-polyisocyanurate (RPU/PIR) foams. The obtained recycling-based polyol was subjected to analytical, physicochemical and spectroscopic tests (FTIR, 1H NMR, 13C NMR) to confirm its suitability for the synthesis of polyurethane materials. Then, it was used to partially replace petrochemical polyol in polyurethane formulation. The obtained RPU/PIR foams were characterized by lower apparent density, brittleness, and water absorption. In addition, foams modified by eco-polyol had higher flame retardancy, as compared to reference foam. The results of the research show that the use of PLA polyol based on plastic waste may be an alternative to petrochemical polyols. This research matches with the current trends of sustainable development and green chemistry.
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Emeka-Chioke, Eucharia Agborma, Prisca Ifeoma Udeozo, Okechukwu Paul Nsude, Theresa Orieiji Uchechukwu, Kingsley John Orie, and Okoro Ogbobe. "Synthesis of Bio-based Polyol Via Epoxidation and Hydroxylation of Shea Butter Fats." Journal of Applied Chemical Science International 14, no. 2 (2023): 28–36. http://dx.doi.org/10.56557/jacsi/2023/v14i28487.

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Polyols are mostly made from petroleum and other non-biodegradable fossil fuels, and as such, they are not environmentally benign. This study presents the process of making bio-based polyols from shea butter fats (SBF) by epoxidation and hydroxylation. Wet analysis, gas chromatography with flame-ionization detection (GC-FID), and Fourier transform infrared spectroscopy (FTIR) were all used to characterize the bio-based polyols. The acid number (13.92 mg KOH/g), iodine value (19.54 mg I2/100 g), saponification value (218.03 mg KOH/g), and viscosity (107.98 poise) suggest a good quality of synthesized SBF-polyol. The FTIR analysis of SBF-polyol indicates the existence of specific vibrational frequencies: 3473 cm-1 for hydroxyl (OH) groups, 2921–2854 cm-1, and 2929–2858 cm-1 for carbon-hydrogen (C-H) and methylene (CH2) groups, respectively, and 1748 cm-1 for carbonyl (-C=O) groups. The major unsaturated fatty acids detected in SBF were oleic acid, with an estimation of 10.41%; linoleic acid and linolenic acid were reported at 0.34% and 1.67%, respectively; however, they were absent in SBF-polyol. According to this data, bio-based polyols can be synthesized using SBF and are suggested for the production of top-notch polyols.
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Dissertations / Theses on the topic "Bio-based polyol"

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Hu, Shengjun. "Production and Characterization of Bio-based Polyols and Polyurethanes from Biodiesel-derived Crude Glycerol and Lignocellulosic Biomass." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374051355.

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Books on the topic "Bio-based polyol"

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Li, Yebo, Xiaolan Luo, and Shengjun Hu. Bio-based Polyols and Polyurethanes. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-21539-6.

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Li, Yebo, Shengjun Hu, and Xiaolan Luo. Bio-Based Polyols and Polyurethanes. Springer London, Limited, 2015.

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Li, Yebo, Shengjun Hu, and Xiaolan Luo. Bio-Based Polyols and Polyurethanes. Springer, 2015.

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Book chapters on the topic "Bio-based polyol"

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Li, Yebo, Xiaolan Luo, and Shengjun Hu. "Introduction to Bio-based Polyols and Polyurethanes." In SpringerBriefs in Molecular Science. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-21539-6_1.

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Zhang, Q., C. Zheng, K. Sagoe-Crentsil, and W. Duan. "Transfer and Substrate Effects on 2D Materials for Their Sensing and Energy Applications in Civil Engineering." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_42.

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AbstractThe recent emergence of two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDs) of the family (Mo, W)(S, Se)2 has attracted interest from a broad range of engineering applications, including advanced sensing and energy harvesting and conservation, because of their distinctive properties. However, it is critical important to achieve intact delamination and transfer of these atomically thin materials, as well as to understand the effects of the target substrates on their optical and electronic properties. Therefore, we developed and compared techniques for transferring as-grown WS2 crystals to arbitrary substrates. Polystyrene-assisted wet transfer can realize improved preservation of monolayer WS2 crystals than the commonly used poly(methyl methacrylate) (PMMA)-assisted wet transfer method, due to minimal chemical etching involved in the 2D material delamination process. The intercalation of alkali ions in the PMMA-based transfer method induces chemical doping over the transferred 2D crystals, leading to the formation of trions. Moreover, the edges of the crystals on hydrophilic substrates, such as sapphire or SiO2/Si, are subject to ambient water intercalation, which locally affects the photoluminescence behavior of the monolayer WS2 by doping and changing of the dielectric environment. This non-uniform optical behavior is absent when the crystal is transferred onto a hydrophobic substrate through which ambient water cannot penetrate. These results have important implications for the choice of target substrate and transfer method adopted for 2D TMD-based applications such as next-generation strain sensing, photodetectors, gas sensing, bio sensing, solar energy harvesting and radiative cooling in which uniform behavior of the channel material is required.
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Zhang, Chaoqun. "Plant Oil-based Polyurethanes." In Green Chemistry and Green Materials from Plant Oils and Natural Acids. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837671595-00059.

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Polyurethanes have become the fifth largest polymeric materials and have been widely used in various fields. Until now, most of the monomers for the production of polyurethane products have been generally derived from non-renewable fossil feedstock. With the increasing global concerns about the depletion of fossil fuels associated with environmental impacts, developing bio-based chemicals and monomers from renewable resources for bio-based polyurethanes has attracted much attention. Plant oils are one of the promising options for such purposes due to their abundant production, biodegradability, and renewable origin. In this chapter, the transformation of plant oils into bio-based chemicals, including polyols, internal emulsifiers, chain extenders, and isocyanates, is reviewed. Furthermore, the general method and performance of different types of polyurethanes (solvent-based, waterborne, and non-isocyanate) are summarized. Finally, the potential applications of these plant oil-based chemicals and polyurethanes are discussed.
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A, Karthik Narayanan, and Mugendiran V. "DISCUSSION ON MECHANICAL BEHAVIOUR OF CRANIAL IMPLANT THROUGH FE SIMULATION BASED ON CT IMAGES." In Futuristic Trends in Mechanical Engineering Volume 3 Book 6. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bgme6p4ch1.

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Construction of patient’s specific cranial implant with a porous structure improves the implant design, surgical planning, implant-tissue interaction and surgeon's accuracy. In the last few decades, even though many researches have underwent in developing bio implant materials for cranioplasty, surgeons are still facing difficulties in developing optimal design for safe and more accurate reconstruction of cranial implant. In this study, CT SCAN containing voxel data based DICOM images of the patient skull is converted into triangle data based STL file. The temporal damaged portion of the skull is reconstructed into a 3D patient specific cranial implant using available commercial software. The mechanical performance of reconstructed cranial implant with different bio - implant materials (Poly Ether Ether Ketone (PEEK), Poly Methyl Metha Acrylate (PMMA) and Titanium alloy (Ti6Al4V)) and external deformity by two fixture conditions (8 and 10 fixation points) has been carried by finite element study. The results reveals that, Ti6Al4V shows less deformation and PEEK exhibit lesser equivalent stress under 15 mm Hg of intracranial pressure when compared to other selected bio - materials.
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Varshini, S., C. Kanishkar Raja, P. Kavitha, R. Menaka, and M. R. Ezhilarasi. "PREPARATION AND CHARACTERISATION OF PVA BASED COMPOSITE FILM AND EVALUATION OF ITS ANTI MICROBIAL ACTIVITY." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 11. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs11p2ch6.

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This chapter reports the determination of eco-friendly, bio degradable polymer composite film by amalgamation of an edible, water soluble polysaccharide named as Carrageenan and based on PVA (polyvinyl alcohol). Polymers are macromolecules with long repeating chains of monomers made by the process of polymerization. Polymers possess multi-functionality and better film-forming capabilities, which could significantly improve protective barrier properties. Natural polymers are one among the major classes of polymers based on their origin. This class includes proteins, cellulose, poly peptides, and silk so on. They have certain advantages over the other classes of polymers because of their easy availability, potential-to bio-degrade, economic viability and their biocompatibility. Natural polymers are abundant and renewable. The biological properties like antibacterial anti-inflammatory and antioxidant efficacy of polymer based dressing can be enhanced by incorporating plant extract. PVA is a semi crystalline synthetic polymer. It can be fabricated into various forms like films and coatings which possess high tensile strength and flexibility. It is a promising biomaterial with high degree of swelling, bio degradability, non-toxicity, adhesiveness, bio inertness etc. Finally, after the composite film is developed, we characterize using FTIR and the solubility of synthesised composite film in different solvents is studied and its Antimicrobial activity is evolved.
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Bolka, Silvester, and Blaž Nardin. "Reactive Extrusion as an Environmentally Friendly Technology for the Production of Bio(Nano)Composites: Implementation and Characterization." In Biocomposites - Recent Advances [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108572.

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The influences of reactive extrusion of poly(lactic acid) (PLA)-based bio(nano)composites on their properties are described. Reactive compatibilizers were used to enable good dispersion of natural (nano)fibers in the thermoplastic matrix consisting of PLA/poly(butylene adipate-co-terephthalate) (PBAT) and PLA/polycarbonate (PC) blends. At the same time, chain extenders were used for the modification of immiscible thermoplastics, PLA and PBAT, in order to achieve good miscibility of the PLA/PBAT blend. In the experimental part, the main obstacle of PLA, its brittleness, was improved in three different series of bio(nano)composites. Reactive extrusion with PLA/PBAT blends and the addition of hops as a chain extender and compatibilizer increased the elongation at break of the bio(nano)composite by more than 240% and the impact strength by 200% compared to neat PLA. Reactive extrusion of PLA/PBAT blends and addition of 1% nanocrystalline cellulose (NCC) with additives increased the elongation at break by more than 730% compared to pure PLA, and the sample did not break during the impact testing. Reactive extrusion with PLA/PC blends and the addition of 1 wt% NCC with additives increased the elongation at break by more than 90% and the impact strength by more than 160% compared to pure PLA.
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Wang, Ziyuan, Zichen Wang, Zhilei Tan, Jiandong Cui, and Shiru Jia. "Application of ε-poly-L-lysine in Improving Food Quality and Safety." In Bio-Based Antimicrobial Agents to Improve Agricultural and Food Safety. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815256239124010009.

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Each year, economic losses in the food industry due to spoilage of grain, aquatic products and fruit are huge. People now express more concern about food safety and nutrition, therefore, the need for green preservatives is also growing. Epsilon-poly-L-lysine (ε-PL), a cationic polyamino acid with 25–35 L-lysine residues, possesses broad-spectrum antimicrobial activity, biodegradable properties, resistance to high temperature, and non-toxicity and can dissolve in water. So, it has been extensively applied in the field of preservatives for foodstuffs, agriculture and biomedicine. Thus, the chapter mainly focuses on the recent research on microbial synthesis, production enhancement, and antimicrobial mechanism, as well as improving food safety, its utilization in food packaging materials and agriculture of εPL .
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Baechler, Serbia Maria Antonieta Rodulfo, Sergio Gonzalez-Cortes, Tiancun Xiao, Hamid A. Al-Megren, and Peter P. Edwards. "Perspective on the Deep Hydrotreating of Renewable and Non-Renewable Oils." In Advanced Solid Catalysts for Renewable Energy Production. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3903-2.ch003.

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To meet not only the increased demand of liquid transportation fuel but also the stringent environmental legislation centered on anthropogenic emissions, renewable resources (i.e., not depleted by use) and low-grade feedstocks need to be processed, since the reserves and quality of the feeds available are markedly declining. In this chapter, an overview on the hydrotreating of renewable and non-renewable feeds for producing ultraclean transportation liquid fuels is given. The fundamentals and factors that affect the generation of ultraclean fuels and bio-fuels are discussed in an integrated perspective. The authors include not only the current understanding of the hydrotreating process but also the challenges for the valorization of non-renewable and renewable feedstocks with high content of heteroatoms and unsaturated poly-aggregate compounds (asphaltenes and lignin). The importance to develop advanced catalysts based on abundant metals, rather than precious metals, and multifunctional properties with sufficient activity and selectivity in hydrodeoxygenation of bio-oils is outlined.
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Rossetto, Leonardo Luís, Nycollas Stefanello Vianna, Altemir José Mossi, and Helen Treichel. "Eco-based polymers: A review concerning bioplastics with greater manufacturing potential." In Frontiers of Knowledge: Multidisciplinary Approaches in Academic Research. Seven Editora, 2024. http://dx.doi.org/10.56238/sevened2024.026-027.

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Currently, it is almost impossible to imagine a world without plastics. These are widely used in various sectors of the economy, such as packaging, construction, transport, healthcare, and electronics, due to their low cost, versatility, durability, and high strength/weight ratio. However, the durability of plastics after use becomes an environmental problem, as a large part of plastic waste ends up in landfills, is incinerated, or discarded illegally, contaminating ecosystems and contributing to global warming. A promising alternative to mitigate these impacts is the development of bioplastics, which are bio-based, biodegradable materials, or both. Bioplastics include poly(lactic acid) (PLA), polyhydroxyalkanoates (PHA), bio-based polyamide (PA), and polypropylene (PP), which have the potential to replace conventional plastics in various applications. Global production of bioplastics is growing, estimated to reach 7.43 million tons by 2028, driven by demand for more sustainable alternatives. Despite challenges, such as high production costs and even inferior properties compared to synthetic plastics, investments in research and development promise to improve these materials. This scope reviews the bioplastics with the most significant manufacturing potential in the coming years. With technological advancement and growing environmental awareness, bioplastics are expected to be crucial in transitioning to a low-carbon circular economy.
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Conference papers on the topic "Bio-based polyol"

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Hellems, Steve, John Willhite, and Ramesh Subramanian. "Bio Based Waterborne Floor Coatings with Enhanced Flow, Appearance, and Early Hardness Development." In SSPC 2015 Greencoat. SSPC, 2015. https://doi.org/10.5006/s2015-00026.

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Abstract The use of sustainable materials in the flooring market has gained widespread interest in recent years. Bio based raw materials contribute significantly to these efforts and are used to prepare environmentally friendly coatings. Castor oil based emulsions are used as polyols in waterborne polyurethane coatings. These systems have outstanding chemical resistance and good durability. But they have inherent issues like very short pot life, poor appearance / flow properties, and delayed early hardness development. In this paper the development of a new castor oil based polyol emulsion that can be used effectively in waterborne polyurethane applications is discussed. The modified polyol emulsion was formulated with polymeric MDI (methylene diphenyl disocyanate) based crosslinker, pigments and additives to prepare thick concrete coatings. The appearance of the system, flow behavior, adhesion characteristics, surface roughness, working life, and early hardness development of the formulations were compared with the control.
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Amjad, Zahid, and Peter G. Koutsoukos. "Influence of Inhibitor Architecture on Magnesium Ammonium Phosphate (Struvite) Precipitation for Waste Water Application." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-10926.

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Abstract In this work, a variety of polymers were evaluated as precipitation inhibitors for magnesium ammonium phosphate (struvite) in aqueous solution. The polymers tested include 1) homopolymers of acrylic acid and methacrylic acid of varying molecular weight (MW), maleic acid, 2-ethyloxazoline, 2) acrylic acid based co- and terpolymers containing monomers with different functional groups and 3) natural, bio- and hybrid based polymers. The results reveal that polymer performance as a struvite inhibitor is strongly affected by polymer dosage, MW, and ionic charge of the functional group. It has been observed that performance of poly(acrylic acid), PAA, is negatively impacted by increasing the struvite solution supersaturation. Moreover, inhibition of struvite by polymers increases with increasing MW with a range of ~2,000 to 60,000 investigated in this paper. Overall performance reveals the following trend by polymer type: homopolymer > copolymer > bio-, hybrid > terpolymer. SEM and XRD investigations confirm struvite crystals formation in the absence and presence of inhibitors.
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Amjad, Zahid, and Amannie Kweik. "Comparative Performance of Natural, Hybrid, and Synthetic Polymers Containing Different Functional Groups as Strontium Sulfate Scale Inhibitors." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-12880.

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Abstract The mitigation of mineral scale continues to pose serious challenge in the efficient operation of many industrial systems. Recently, due to environmental issues relating to eutrophication and strict chemicals discharge regulations have challenged the industry to develop new environmentally friendly solutions to corrosion and scale control. Among the natural additives tested include: lignosulfonate, green tea extract, humic, tannic, and fluvic acids. The inhibitory activity of biodegradable polymer such as poly(aspartic acid), inulin-based hybrid polymers containing carboxyl (-COOH) and several synthetic homo-and copolymers containing a variety of functional groups has also been studied. The results indicated that performance of additives tested strongly depends on the inhibitor architecture. Based on the data collected, the additives may be ranked as follows: homo-> bio- > hybrid = synthetic copolymers Scanning electron microscopic and X-ray diffraction studies of the SrSO4 crystals grown in the presence of polymers show that structures of SrSO4 crystals are highly modified.
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Kote, Prashant, Magdalen Asare, Sahilkumar Chaudhary, Tim Dawsey, and Ram Gupta. "Flame Retardant Polyurethane Foams Using Vegetable Oil-based polyol." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/iefv6816.

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Polyurethanes can be used in many applications by modifying their properties via facile methods. Most of the polyurethanes currently used for industrial applications originated from petrochemical-based chemicals. There is a growing demand in industries to use renewable resources for polyurethanes. Vegetable oil-based polyurethanes have shown properties comparable to that of petroleum-based polyurethanes. In this research, sunflower oil was used as a renewable resource for polyurethanes. Rigid polyurethane foams were prepared using sunflower-based polyols. The polyols were synthesized via epoxidation followed by a ring-opening reaction. Epoxy number, hydroxyl number, viscosity, and spectroscopy characterizations confirm the synthesis of bio-polyol. One of the major issues in polyurethanes is their high flammability which was reduced by using flame-retardants. Two flame-retardants using melamine and diphenylphosphinic acid (DPPMA) and a phosphorous‐nitrogen intumescent flame‐retardant (2,2‐diethyl‐1,3‐propanediol phosphoryl melamine, DPPM) were synthesized and used in bio-based polyurethanes. as used as an additive flame retardant. The foams with DPPMA and DPPM showed high closed cell content ( >90%) with a high compression strength of 217 kPa and 208 kPa, respectively. The microstructure analysis of the foams using scanning electron microscopy revealed an even distribution of the pore size. The addition of DPPMA and DPPM in polyurethane foams results in the formation of a protective char layer during the flammability test and reduces the weight loss from 43% to 2.5% and 1.4% and burning time from 70 seconds to 6 seconds and 4.5 seconds, respectively. Our research suggests that sunflower oil could be a potential candidate for the polyurethane industries and DPPMA and DPPM can be used as an effective flame-retardant in these bio-based polyurethane foams.
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Magdadaro, Miceh Rose D., Rey Y. Capangpangan, Arnold A. Lubguban, and Arnold C. Alguno. "Effects of N-Octadecane as PCM on the Thermal and Mechanical Properties of Polyurethane Foams Utilizing Coconut-Based Polyols." In International Conference on Advances in Materials Science 2021. Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-2ih4l3.

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The utilization of vegetable oil in producing bio-based polyol, as an alternative replacement to petroleum-based polyol in making polyurethane (PU) foam has gained a lot of interest due to its finite supply and low production cost. In this study, bio-based polyol using coconut oil as raw material produced PU foam as thermal insulation material. The vegetable oil-based polyol was prepared using a two-step method, while PU foams were prepared by the free-rise method. In order to enhance the thermal properties of the produce PU foams, phase change material (PCM) was added to the PU foam formulation. FTIR spectra result showed peaks at 2920 cm-1 and 2850-1, which signifies the CH2 asymmetric stretching, indicating that n-octadecane was successfully incorporated into PU foams. Moreover, heat flow meter (HFM) and thermo-gravimetric analysis (TGA) show PU foam with 1% n-octadecane shows better thermal properties than other produced PU foams. Furthermore, the universal testing machine (UTM) result shows an enhancement in the mechanical properties of the produced PU foam. These results demonstrate that the addition of n-octadecane to the PU foam formulation improved the mechanical properties of PU foams while enhancing their thermal properties.
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Hosseini, Nassibeh, Chad A. Ulven, Fardad Azarmi, Dean C. Webster, and Thomas J. Nelson. "Utilization of Flax Fibers and Glass Fibers in a Bio-Based Resin." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39393.

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A novel highly functional plant oil-based polyols, Methoxylated Sucrose Soyate Polyols (MSSP), were cross-linked with isocyanate to formulate MSSP-based polyurethane (PU) thermosets. The degree of cure or conversion was studied using differential scanning calorimetry (DSC). Compression molding process was used to make composite panels out of MSSP-based polyurethane and flax fiber reinforcement of about 50 vol %. The MSSP-based PU resin reinforced with 50 vol % unidirectional E-glass fiber mats was tested as a reference. The composites were cured at 150°C for 60 minutes. Properties of the MSSP-based PU thermosets and its corresponding flax/glass-fiber reinforced thermoset composites were assessed by tensile strength and modulus, flexural strength and modulus, interlaminar shear strength (ILSS), nanoindentation test, and impact strength. Specific tensile modulus and strength of the flax fiber composites were found to compare with those of glass/MSSP-based PU. The glass/MSSP-based PU composite exhibited superior mechanical properties compared to both bio-based and petroleum-based composites used in previous studies. Compared to soybean oil based composites used in previous studies, bio-based composites based on MSSP showed 70 % and 101 % increase in flexural strength and modulus respectively, 102 % and 93 % increase in tensile strength and modulus respectively, and 56 % increase in ILSS. Compared to petroleum-based PU/glass composites used in previous studies, bio-based composites based on MSSP showed 60 % and 40 % increase in flexural strength and modulus respectively, 102 % and 78 % increase in tensile strength and modulus respectively, 50 % increase in ILSS. Higher mechanical properties in MSSP-based PU composites can be attributed to high functionality, rigid and compact chemical structures of MSSP oligomers in polyol resin.
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PATEL, CHIRAGKUMAR M., and Nikhil Dhore. "An Efficient and Environment Friendly Bio-based Polyols Through Liquefaction: Liquefaction Temperature and Catalyst Concentration Optimization and Utilized for Rigid Polyurethane Foams." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/ginx2847.

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Aiming towards the liquefaction of paddy straw was accumulation as well as providing a technically viable route leading to preservation of the natural resources and environment, the paddy straw was chemically liquefied. Paddy straw were liquefied into bio-based polyol in the presence of castor oil and blend of castor and karanja oil as depolymerizing agent and p-toluene sulfonic acid as catalyst. Liquefied product was characterized by chemical as well as analytical techniques. The agricultural waste base paddy straw was eventually converted into polymeric precursor (polyol) monomer with nearly 80 to 95% yield by employing 2% catalyst concentration and at optimized temperature of 180 °C. Synthesized polyol can be utilized further in formulating high quality rigid polyurethane foams. The foams were characterized in terms of their physical, mechanical, thermal and morphological properties. All foams exhibit good compressive strengths and thermal stability. Thermal conductivity of foams varied between 0.012 and 0.023 Kcal/mh C, with the lowest being of foam from liquefied (LP), making it suitable for utilization as an insulation material.
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Chinnasami, H., and R. Devireddy. "Osteo-Induction of Human Adipose Derived Stem Cells Cultured on Poly (L-Lactic Acid) Scaffolds Prepared by Thermally Induced Phase Separation Method." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51906.

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Bio-degradable Poly (l-lactic acid) (PLLA) scaffolds synthesized using thermally induced phase separation (TIPS) method was used to load cryo-preserved human adipose derived stem cells (hASCs). To make the scaffolds, PLLA-Dioxane solutions were formed by dissolving PLLA in 1,4-Dioxane with three different compositions (wt/vol). These PLLA-Dioxane solutions, frozen in three different cooling rates were lyophilized at 0.037bar and −70°C for 48hrs resulting in porous PLLA scaffolds. Based on the porosity, pore size and compressive strength, a suitable scaffold was chosen to investigate its bio-compatibility and osteo-inductive potential.
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Ozbay, N., and A. S. Yargic. "Liquefaction of oak tree bark with different biomass/phenol mass ratios and utilizing bio-based polyols for carbon foam production." In PROCEEDINGS OF THE 6TH INTERNATIONAL ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE CONGRESS & EXHIBITION: (APMAS 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.4975454.

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Lin, Chih-ting, Che-wei Huang, and Jui-ching Wang. "Poly-Silicon Nanowire FET Chemical Sensor." In ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13124.

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Based on the improvements of the fabrication technologies, the dimension of the device has decreased to tens of nanometer. The nano-technology has become intriguing to integrate semiconductor technologies into bio-related applications. As the consequence, silicon nanowires (Si NWs) have been proposed to detect proteins, DNA, virus, and ions etc. However, few of previous studies consider the possibility to merge with CMOS standard process. In this work, we announced CMOS compatible technique which is used to develop polysilicon nanowire field effect transistor (poly-Si NW FET) as a chemical sensor to address this issue.
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Reports on the topic "Bio-based polyol"

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Pray, Todd. Identification and characterization of an oleaginous microalgal base strain for use in bio-based poly-urethane production. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1631730.

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