Article
Biochemistry & Molecular Biology
Peng Zhou, Yongyue Luo, Zhen Lv, Xunwen Sun, Yongqiang Tian, Xinxing Zhang
Summary: By incorporating corn starch and cellulose nanofibrils into biodegradable poly (vinyl alcohol) through melt-processing, mechanically robust and sustainable composites were successfully prepared. Analysis showed that this approach can improve the thermoplasticity and broaden the processing window of PVA composites, while enhancing their tensile strength, modulus, and elongation at break.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Aldona Dluga, Dagmara Bajer, Halina Kaczmarek
Summary: This research focuses on novel ecological materials for biomedical and cosmetic applications. The blends of bionanocellulose and poly(vinyl alcohol), BNC/PVA, were prepared and their properties were examined under UV radiation and high temperature. The results showed that UV irradiation increased the crystallinity degree and changed the mechanical properties of the samples. However, the effects induced by UV-irradiation did not significantly deteriorate the materials' properties designed for medical applications. Thermogravimetric analysis exhibited good thermal stability for all samples.
Article
Nanoscience & Nanotechnology
Irina M. Factori, Julia M. Amaral, Paulo H. Camani, Derval S. Rosa, Bruna A. Lima, Marcelo Brocchi, Emerson R. da Silva, Juliana S. Souza
Summary: A method for synthesizing ZnO_PVA nanocomposite films using a sol-gel strategy with microwaves and PVA is presented. The properties of the nanocomposites can be easily modulated by controlling synthesis parameters, and the use of PVA eliminates the need for compatibilizers, acting as both the polymer matrix and mediator for in situ synthesis of nanostructured ZnO clusters.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Paper & Wood
Quentin Charlier, Jeremie Viguie, Barthelemy Harthong, Didier Imbault, Robert Peyroux, Philippe Martinez, Marie Caron, David Guerin
Summary: The study investigates the use of ultrasonic welding to assemble chromatogeny grafted-papers coated with poly(vinyl alcohol). The results show that grafted-papers can be successfully assembled by ultrasonic welding, although it requires more severe processing conditions and the resulting peeling strength is lower than for non-grafted papers. Nevertheless, the mechanical performances are satisfactory for most packaging applications. Chromatogeny grafting modifies the adhesion mechanisms involved in the formation of welded joints, and the joint strength increases with the poly(vinyl alcohol) coating weight.
Article
Materials Science, Multidisciplinary
Yu Lei, Imane Boucenna, Veronique Thevenet, Diana Dragoe, Alain Ponton
Summary: In this study, PVA/GO composites were prepared using the freezing-thawing method, with investigations on their morphology, chemical structure, viscoelastic properties, and absorption of a cationic dye. The results showed that increasing the concentration of GO led to significant improvements in the properties of the composites, particularly in terms of absorption capacity. A correlation between absorption, swelling, and viscoelastic properties was proposed for the PVA/GO composites.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Thermodynamics
Daniela F. S. Freitas, Gabriela C. Mattos, Luis C. Mendes
Summary: This study investigates the effects of a synthetic nanofiller on poly(vinyl alcohol)/poly(vinylpyrrolidone)/zirconium phosphate (PVA/PVP/ZrP) nanocomposites for potential application in drug delivery control. The findings suggest that ZrP enhances the thermal stability of PVA and exhibits strong interaction with PVA.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Multidisciplinary
Gerlis von Haugwitz, Kian Donnelly, Mara Di Filippo, Daniel Breite, Max Phippard, Agnes Schulze, Ren Wei, Marcus Baumann, Uwe T. Bornscheuer
Summary: Poly(vinyl alcohol) (PVA) is a water-soluble synthetic vinyl polymer with remarkable physical properties. However, its biodegradability is low and existing degradation methods have disadvantages. In this study, a modified PVA film and a PQQ-independent enzymatic cascade for the degradation of PVA are presented, which can be suitable for industrial applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Xu Yang, Baolong Wang, Di Sha, Yonggang Liu, Jiuduo Xu, Kai Shi, Cong Yu, Xiangling Ji
Summary: The injectable and antibacterial hydrogels based on c-poly (L-lysine)-modified poly (vinyl alcohol)/chitosan/silver complexes displayed excellent bactericidal properties, biocompatibility, and accelerated wound healing effects.
Article
Polymer Science
Xiaodong Xu, Lujuan Li, Seyed Mohsen Seraji, Lei Liu, Zhen Jiang, Zhiguang Xu, Xin Li, Sheng Zhao, Hao Wang, Pingan Song
Summary: The addition of inositol molecules as cross-linkers can increase the strength and toughness of nanostructured PVA composites, with a correlation between H-bond cross-linking density and mechanical properties. Dynamic physical cross-linking and crystalline grain refinement contribute to the enhanced performance of the materials.
Article
Polymer Science
Seong Baek Yang, Mohammad Rezaul Karim, Jungeon Lee, Jeong Hyun Yeum, Sabina Yeasmin
Summary: Novel poly(vinyl alcohol)/poly(vinyl butyral-vinyl alcohol) films with improved hydrophobicity were prepared by saponification of poly(vinyl acetate)/poly(vinyl butyral) blend films. The saponification process was confirmed by various analysis techniques. The hydrophobicity of the films increased with increasing poly(vinyl butyral) content. The saponified films exhibited improved mechanical properties and unique surface characteristics. These films have potential applications in biomaterials, filters, and medical devices.
Article
Chemistry, Applied
Dorota Lachowicz, Angelika Kmita, Roma Wirecka, Katarzyna Berent, Michal Szuwarzynski, Szczepan Zapotoczny, Anna Pajdak, Grzegorz Cios, Natalia Mazur-Panasiuk, Krzysztof Pyrc, Andrzej Bernasik
Summary: In this study, a new filtering bioaerogel based on linear polyvinyl alcohol (PVA) and the cationic derivative of chitosan (HTCC) was developed for potential antiviral application. The introduction of linear PVA chains formed a strong intermolecular network architecture that efficiently interpenetrated the glutaraldehyde-crosslinked HTCC chains. The modified aerogels showed enhanced micro- and mesopore space as well as BET-specific surface area compared to the starting sample chitosan aerogel crosslinked by glutaraldehyde (Chit/GA). XPS analysis confirmed the presence of cationic groups on the aerogel surface, which can interact with viral capsid proteins. The HTCC/GA/PVA aerogel demonstrated efficient trapping of mouse hepatitis virus (MHV) from suspension without cytotoxic effects on fibroblast cells.
CARBOHYDRATE POLYMERS
(2023)
Article
Engineering, Electrical & Electronic
Buzuayehu Abebe, Enyew Amare Zereffa, H. C. Ananda Murthy, C. R. Ravikumar
Summary: The application of zinc oxide-based nanocomposites in electronic devices has shown promising results, with porous PVA aided ZnO/Fe2O3 nanocomposites displaying improved physical properties and charge transfer capabilities compared to pure ZnO. Various characterization techniques, such as XRD, SEM, and EDXS, were utilized to confirm these findings.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Multidisciplinary Sciences
Oranooch Somseemee, Pongdhorn Saeoui, Florian T. Schevenels, Chomsri Siriwong
Summary: This study evaluated the reinforcement of cellulose nanocrystals in epoxidized natural rubber. The prepared CNCs and M-CNCs were characterized and incorporated into ENR latex. The results showed that M-CNCs exhibited better reinforcement than CNCs at the same filler loading.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Fauzi Handoko, Yusril Yusuf
Summary: This study aimed to extract nanocrystalline cellulose (NCC) from tea waste through chemical processes and use it as a filler in PVA nanocomposites. The addition of NCC improved the physicochemical properties of the nanocomposites, including increased opacity, thermal and mechanical properties, and crystallinity, while decreasing the swelling ratio.
Article
Chemistry, Multidisciplinary
Yanni Zhou, Yadong Chai, Mari Miyata, Motohiro Tagaya
Summary: We have developed a biomimetic process to achieve effective calcium phosphate particle precipitation on poly(vinyl alcohol) films. By controlling the exposure of carboxylate ions and esterification reaction in the films, Ca2+-carboxylate ion interactions were formed, leading to successful precipitation of calcium phosphate on the films. This technology has the potential to control the density and size of the precipitated particles and can be applied on polymeric films.
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.