Article
Polymer Science
Riza Asmaa Saari, Ryota Maeno, Warinda Marujiwat, Muhammad Shahrulnizam Nasri, Kazuaki Matsumura, Masayuki Yamaguchi
Summary: The addition of lithium bromide significantly enhances the mechanical properties of PVA fibers by reducing crystallinity and hydrogen bonding between PVA chains. Lithium bromide is removed from the fibers during spinning, while maintaining strong hydrogen bonding within the fibers.
Article
Polymer Science
Lujuan Li, Xiaodong Xu, Lei Liu, Pingan Song, Qianqian Cao, Zhiguang Xu, Zhengping Fang, Hao Wang
Summary: The presence of water significantly reduces the mechanical strength of PVA but increases its plasticity. Additionally, water inclusion lowers the glass transition temperature of PVA, increases free volume, and promotes relaxation and mobility of PVA chains. This is mainly due to the plasticizing and lubricating effects of water on the PVA chains.
Article
Engineering, Environmental
Yifan Zheng, Hong Huang, Junrong Yu, Zuming Hu, Yan Wang
Summary: A highly-stretchable and reprogrammable PVA-based hydrogel actuator was developed through freezing-thawing treatment and UV irradiation. The actuator exhibited improved mechanical properties and reprogrammable actuation performance, providing a facile and low-cost approach to develop high-performance reprogrammable hydrogel actuators.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yue Qian, Jing Zhong, Jinping Ou
Summary: This study addresses the challenges of unsatisfactory mechanical properties and long-term stability in the alkali environment of fiber-reinforced polymer composites through a dual modification method, resulting in enhanced performance and stability.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Qingru Shen, Shuizhong Wang, Guoyong Song
Summary: In this study, a unique crystallite structure of C-lignin nanoparticles was discovered, and compositing with PVA resulted in materials with improved mechanical properties and various desirable characteristics. This work introduces a novel sustainable building block for strong polymeric materials and discovers a new route for the valorization of waste biomass.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Composites
Lujuan Li, Xiaodong Xu, Bingtao Wang, Pingan Song, Qianqian Cao, Yang Yang, Zhiguang Xu, Hao Wang
Summary: The research found that the structure, chain dynamics, and mechanical properties of PVA/PhyAc composite are influenced by the content of PhyAc. When the PhyAc content reaches 1.9 wt%, the PVA composite shows lower free volume and smaller diffusion coefficient, while the glass transition temperature (T-g) of PVA reaches the maximum at around 1.25 wt% of PhyAc. Additionally, adding 10 wt% PhyAc gives PVA the highest tensile strength and good antibacterial capability.
COMPOSITES COMMUNICATIONS
(2021)
Article
Energy & Fuels
Jijian Zhang, Jingjing Wang, Danying Zuo, Jing Xu, Qiuhan Wang, Hongwei Zhang
Summary: A novel strategy was proposed to in situ fabricate PVA/TA-based gel polymer electrolytes by using ethylene glycol (EG) and H2O as the binary solvent. The optimized electrolyte showed excellent mechanical properties, flexibility, and an ionic conductivity of 106.9 mS cm-1. The corresponding flexible solid-state EDLC demonstrated acceptable bendability and robust serviceability. This work may provide a universal strategy for in situ preparation of PVA/TA-based gels in energy storage and other related fields.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Jin Luo, Xike Xiong, Nan Ji, Weiwei Zhang, Jun Sun, Jianjun Wang, Qiqi Zhuo, Chuanxiang Qin, Lixing Dai
Summary: A PVA-based hydrogel fiber containing tea polyphenols (TPs) with excellent mechanical and shape memory performances was prepared using fiber drawing technology. The hydrogel fiber can recover to its original shape in 2-5 seconds and has improved strength while maintaining high elongation at break. The hydrogel fiber used in sutures demonstrates satisfactory speed and reliability. Therefore, drawn shape memory hydrogel fibers hold promise for advanced biomedical textiles and intelligent engineering fibers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jin Luo, Xike Xiong, Nan Ji, Weiwei Zhang, Jun Sun, Jianjun Wang, Qiqi Zhuo, Chuanxiang Qin, Lixing Dai
Summary: In this study, a shape memory hydrogel fiber containing tea polyphenols (TPs) was prepared using fiber drawing technology, exhibiting excellent mechanical and shape memory properties. The fiber can recover to its original shape from various temporary shapes in 2-5 seconds and shows significantly improved strength without sacrificing elongation at break. When used in sutures, the hydrogel fiber demonstrates satisfactory suture speed and reliability, suggesting its potential application in advanced biomedical textiles and intelligent engineering fibers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Tomas Remis, Petr Belsky, Tomas Kovarik, Jaroslav Kadlec, Mina Ghafouri Azar, Rostislav Medlin, Veronika Vavrunkova, Kalim Deshmukh, Kishor Kumar Sadasivuni
Summary: Advanced polymer nanocomposites were developed using a single-step solution-casting method, with nanodiamonds (NDs) improving the stability and mechanical properties of polyvinyl alcohol (PVA). The interaction between NDs and PVA led to a significant increase in tensile strength, with NDs present in agglomerates of approximately 60 nm size. Results from various analyses techniques confirmed the potential of NDs as a beneficial nanofiller for enhancing the properties of PVA.
Article
Chemistry, Applied
Yu Liu, Yian Chen, Haisong Qi
Summary: Novel KCNF/PVA films with excellent water resistance and wet strength can be generated by combining Sargasso cellulose nanofibers (CNFs) and polyvinyl alcohol (PVA) through a crosslinking strategy.
CARBOHYDRATE POLYMERS
(2022)
Article
Materials Science, Composites
Ning Zhang, Yong Pang, Zhaohui Li, Chuanhui Yang, Lu Zong, Hongsheng Yang, Hao Wu, Yongxin Duan, Jianming Zhang
Summary: In this study, biodegradable PVA-based elastomers with excellent solvent barrier property and high elasticity were fabricated. The water-soluble resin PAE was used as a crosslinker to effectively crosslink carboxyl PVA chains. The collaborative triple networks in the prepared PVA composites contribute to their excellent elastomer behavior. Furthermore, these materials demonstrated highly efficient barrier performance against chemical solvents permeation as chemical protective gloves, and showed a high degradation rate.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Keyredin Selman, Kiran Shahapurkar, Venkatesh Chenrayan, Mohammed A. Alamir, Ibrahim M. Alarifi, Vineet Tirth, Abdulaziz H. Alghtani, Ali Algahtani, Tawfiq Al-Mughanam
Summary: This study investigates a novel composite consisting of Kulkual fibers and Titanium diboride (TiB2) filler reinforced epoxy composites. Kulkual, also known as Opuntia ficus-indica, is a plant plentifully found in Ethiopia and is utilized in the form of fibers along with TiB2 as reinforcement for synthesizing epoxy matrix composites. Six types of composites with varying content of Kulkual fibers and fixed TiB2 content are fabricated and their mechanical properties are evaluated. The results show that the addition of Kulkual fibers improves the tensile and flexural properties of the composites, with the EK-10 composite exhibiting the greatest improvement. Fractured surfaces are also analyzed to identify the structure-property relationships.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Chengkai Li, Zheyi Zhang, Haifei Zhan, Zhuoqun Zheng, Jingshuai Bai, Yuantong Gu
Summary: Low-dimensional carbon nanostructures, such as diamane, can effectively enhance the mechanical properties of polymer nanocomposites. Diamane with a laminated structure can promote the tensile properties of the nanocomposite by deforming simultaneously with the matrix, providing higher resistance under compression and shear tests. Surface functionalization for mechanical interlocking at the interface is effective for fully embedded nanofillers in enhancing the overall mechanical performance.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Construction & Building Technology
Haiyang Hao, Jiwei Song, Manzhi Chen, Xu Yan, Kaifeng Zhang
Summary: This study investigates the effects of hybrid inorganic short-cut carbon fiber and basalt fiber on the rheological and mechanical performances of shale gas well cement. The results show that the combination of carbon fiber and basalt fiber not only does not affect the workability and pumpability of the cement slurry, but also improves its sedimentation stability, tensile strength, flexural strength, and mitigates the brittleness of the cement stone.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
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.