Article
Engineering, Biomedical
Binbin He, Jianhai Yang, Yang Liu, Xianhua Xie, Huijie Hao, Xiaoli Xing, Wenguang Liu
Summary: The study introduces a novel vitreous substitute based on zwitterionic polymer hydrogel, which exhibits excellent anti-fouling ability and biocompatibility, effectively reducing inflammatory responses and complications.
BIOACTIVE MATERIALS
(2021)
Article
Engineering, Environmental
Jingwei Sun, Shengchen Yang, Jiali Wu, Xixi He, Yujian Zhang, Jingjing Ji, Cheng Zhang, Ziqi Liang
Summary: In this study, FEC materials with interchain charge-transfer complexes (CTCs) were prepared via electro-polymerization, showing good reversibility and optical performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Biomedical
Indu Yadav, Shiv Dutt Purohit, Hemant Singh, Neeladrisingha Das, Partha Roy, Narayan Chandra Mishra
Summary: A tri-polymer complex in situ hydrogel has been developed as a potential vitreous substitute, formed by crosslinking HA, Coll, and PEG. The hydrogels are biocompatible, transparent, elastic, injectable, and have a high water content, showing promise for vitreous replacement in ophthalmic diseases.
BIOMEDICAL MATERIALS
(2021)
Article
Engineering, Biomedical
Alexander E. G. Baker, Hong Cui, Brian G. Ballios, Sonja Ing, Peng Yan, Joe Wolfer, Thomas Wright, Mickael Dang, Nicola Y. Gan, Michael J. Cooke, Arturo Ortin-Martinez, Valerie A. Wallace, Derek van der Kooy, Robert Devenyi, Molly S. Shoichet
Summary: The study developed a new hyaluronan-oxime crosslinked hydrogel as a vitreous substitute, which has similar physical properties to the native vitreous. It showed good cytocompatibility and biocompatibility in vitro with mouse retinal explants and in rabbit eyes, demonstrating stability and limited swelling.
Article
Pharmacology & Pharmacy
Jose Hurst, Annekatrin Rickmann, Nele Heider, Christine Hohenadl, Charlotte Reither, Andreas Schatz, Sven Schnichels, Kai Januschowski, Martin S. Spitzer
Summary: The study demonstrated that highly viscously thiol-modified cross-linked hyaluronate showed good biocompatibility in rabbit eyes, making it a promising potential as a vitreous substitute over 6 months.
FRONTIERS IN PHARMACOLOGY
(2022)
Article
Engineering, Environmental
Hongyao Yin, Xin Yin, Ruibo Cao, Peiyun Zeng, Jing Wang, Dianguo Wu, Xinjie Luo, Youyi Zhu, Zhuo Zheng, Yujun Feng
Summary: This study reports on polymer-based in situ cross-linked gels with adjustable gelation times, which can be used for water shutoff and conformance control, improving sweep efficiency and oil recovery in oil reservoirs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Engineering, Biomedical
Ting Wang, Ruijin Ran, Yan Ma, Ming Zhang
Summary: Vitreoretinal surgery is crucial for treating various eye diseases, with the development of polymer hydrogels as potential ideal vitreous substitutes facing challenges. The review focuses on the advancements in natural-based and synthetic hydrogels, particularly emphasizing on stimuli-response and self-assembly supramolecular hydrogels.
BIOMEDICAL MATERIALS
(2021)
Article
Chemistry, Physical
Rebecca I. Randle, Ana M. Fuentes-Caparros, Leide P. Cavalcanti, Ralf Schweins, Dave J. Adams, Emily R. Draper
Summary: The use of small-angle neutron scattering to investigate the aggregation of self-assembling molecules is well established and shows promise in various applications, such as in electrochemistry. Electrochemistry can induce aggregation and can be carried out directly on a sample in the neutron beam to monitor changes in situ.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Applied
Shuo Wang, Jinhua Chi, Zhiwen Jiang, Huiwen Hu, Chaozhong Yang, Wanshun Liu, Baoqin Han
Summary: The study developed a biocompatible, self-repairing, and in-situ injectable hydrogel using CMCTS and OHA as a vitreous substitute. The hydrogel showed good cytocompatibility on mouse fibroblast L929 and histocompatibility in New Zealand Rabbits, without significant and persistent adverse effects observed.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Shuai Luo, Shuaida Wang, Xudong Yang, Kai Yuan, Huan Zhang, Shuai Zhang, Xi Yang, Yurong Guo
Summary: In this study, a pectic polysaccharide obtained from apple pomace by metal ion precipitation technique showed unexpected gelation behavior. When Ca2+ ions were added, the apple pectin exhibited remarkable gelling ability upon cooling to low temperature, but no gel was formed at room temperature or in the absence of Ca2+. The gelation mechanism was explained as a balance of hydrogen bonds and Ca2+ crosslinks between apple pectin molecules during cooling.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Tommaso Nicolini, Ariana Villarroel Marquez, Bertrand Goudeau, Alexander Kuhn, Gerardo Salinas
Summary: This study proposes the coupling of UV-vis-NIR spectroscopy with in situ electrochemical-conductance measurements to compare the doping process of three different thiophene-based conducting polymers. The simultaneous monitoring of electrical and absorption properties, associated with low energy electronic transitions characteristic for polarons and bipolarons, was achieved. This method also allows evaluating the reversible charge trapping mechanism of poly-3,4-o-xylendioxythiophene (PXDOT), making it a useful tool to determine relevant physicochemical properties of conductive materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yadong Yu, Zhengxi Guo, Yuegi Zhao, Kangren Kong, Haihua Pan, Xurong Xu, Ruikang Tang, Zhaoming Liu
Summary: The development of environmentally friendly plastics is crucial for sustainable development. A recent study has successfully created flexible mineral nanofibers through biomimetic mineralization and inorganic polymerization, resulting in a hierarchically structured bulk hybrid mineral with plasticity characteristics. This material exhibits better hardness and thermostability than traditional polymer plastics and is a promising substitute for plastic.
ADVANCED MATERIALS
(2022)
Article
Polymer Science
Ahmad Arar, Assi Al Mousawi, Fabrice Morlet-Savary, Jacques Lalevee
Summary: Redox free radical polymerization (RFRP) is a cost-effective technique for producing polymers quickly and without energy consumption. By blending metal salts as oxidizing agents and reducing agents, a process with economic, low toxicity, and high stability is achieved under mild conditions. This method also allows for good control of gel time and an original chemical mechanism for the redox initiators is provided based on electron spin resonance experiments.
Article
Chemistry, Multidisciplinary
Natsuki Suda, Takuho Saito, Hironari Arima, Shiki Yagai
Summary: Recent advances in supramolecularly engineered dye aggregates have allowed for the design and control of simple one-dimensional structures and closed structures. In this study, a new dyad was introduced that can form nanotoroids, nanotubes, or 1D fibers depending on the conditions. This is the first successful example of light-induced modulation of supramolecular polymorphism to produce distinctly nanostructured aggregates under isothermal conditions.
Article
Chemistry, Applied
Remco Kornet, Simone Penris, Paul Venema, Atze Jan van der Goot, Marcel B. J. Meinders, Erik van der Linden
Summary: In this study, the gelling behavior of pea protein concentrate, albumin-fraction, and globulin-rich fraction were compared to whey protein isolate. The albumin-rich fraction formed firmer gels than globulins per unit of protein. When exploring their ability to substitute whey protein isolate in heat-set gels, it was found that albumin-fraction mixtures formed firm gels that were less sensitive to pH and ionic strength changes. Disulphide bonding played a more important role in the albumin-fraction mixtures compared to the other fractions.
FOOD HYDROCOLLOIDS
(2021)
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.