Article
Biochemistry & Molecular Biology
Adrien Lusterio, Michael A. Brook
Summary: In this study, saccharide-silicone surfactants were successfully prepared using a three-step synthetic method involving the natural linker cysteamine and saccharide lactones. The Piers-Rubinsztajn plus thiol-ene plus amidation process allows for precise tailoring of both hydrophobe and hydrophile, and the resulting products exhibit interesting surface activities. This synthetic method is environmentally friendly and utilizes natural hydrophiles cysteamine and saccharides, offering a more sustainable alternative to PEG-based surfactants.
Article
Chemistry, Multidisciplinary
Rong Fu, Longyue Yu, Junying Zhang, Huidong Yu, Shengyu Feng, Xing-Dong Xu
Summary: In this study, siloxane units were introduced into AIE molecules, and TPE derivatives with siloxane side chains were synthesized. The obtained AIE molecular liquids exhibited unique photophysical properties. Compared with traditional long-chain alkyl molecular liquids, siloxane TPE showed lower viscosity, better fluidity, and temperature responsiveness.
CHINESE CHEMICAL LETTERS
(2022)
Review
Biochemistry & Molecular Biology
Slawomir Rubinsztajn, Julian Chojnowski, Urszula Mizerska
Summary: Tris(pentafluorophenyl)borane (TPFPB) is a unique Lewis acid that enables the condensation between hydrosilanes (Si-H) and alkoxysilanes (Si-OR) to form siloxane bonds (Si-OSi) in the presence of TPFPB, resulting in the release of hydrocarbon (R-H) as a byproduct, known as the Piers-Rubinsztajn reaction. TPFPB also catalyzes reactions involving hydrosilanes with silanols (Si-OH), alcohols (R-OH), ethers (R-OR') or water to form siloxane bonds, alkoxysilane (Si-OR or Si-OR') or silanol (Si-OH), respectively. These Piers-Rubinsztajn reactions provide new synthetic tools for the controlled synthesis of siloxane materials under mild conditions with high yields. This review summarizes 20 years of research efforts in this field, highlights new synthetic methodologies for well-defined siloxane oligomers, polymers, and copolymers, and discusses the potential applications of these new materials. Furthermore, the mechanistic aspects of recently discovered reactions involving hydride transfer from silicon to silicon are also discussed in detail.
Article
Chemistry, Physical
Yue Yang, Zheng Wang, Xiangyang Peng, Zhen Huang, Pengfei Fang
Summary: In this article, the effect of crosslinker content on the properties of silicone rubber was investigated by studying the free volume holes in the samples. It was found that increasing the crosslinker content reduced the size of free volume holes but did not affect the concentration of holes. Additionally, surface cracks were observed on samples with high crosslinking levels after corona treatment, leading to a decrease in water repellency.
Article
Chemistry, Multidisciplinary
Jeehye Yang, Myeongjae Lee, Se Young Park, Myoungjin Park, Jonghoon Kim, Niranjan Sitapure, Donghyo Hahm, Seunghyun Rhee, Daeyeon Lee, Hyunwoo Jo, Yong Hyun Jo, Jaemin Lim, Jungwook Kim, Tae Joo Shin, Doh C. Lee, Kyungwon Kwak, Joseph S. Kwon, BongSoo Kim, Wan Ki Bae, Moon Sung Kang
Summary: This paper reports a nondestructive direct photopatterning method for heavy-metal-free quantum dots (QDs) using branched light-driven ligand crosslinkers (LiXers). It demonstrates the ability to create multicolored QD patterns on a micrometer scale without compromising the intrinsic optoelectronic properties of the QDs, and extends the device lifetime.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Cody B. Gale, Michael A. Brook
Summary: The encapsulation of hemin in polymer systems provides a powerful tool for synthetic enzyme preparation. By increasing the amount of excess amine, elastomers showed greater catalytic efficiency due to the coordination of amines to the iron center of hemin.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Polymer Science
Theresa Fischer, Susana Suttor, Salma Mansi, Lucas Osthues, Petra Mela
Summary: In this study, photocatalytically active nanoparticles were added to silicone rubber matrix materials to produce elastic antibacterial bulk materials. The experimental results showed that these materials have significant antibacterial effects, with reductions of up to >99.999%.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Kui He, Yimo Qin, Juan Wang
Summary: A novel carbon nitride particle-decorated three-dimensional porous nickel foam electrode was fabricated for efficient separation of photoexcited charge carriers and glucose detection with good anti-interference properties.
Article
Biochemistry & Molecular Biology
Yong Liu, Feng Tao, Yibo Xing, Yifei Pei, Fengzhang Ren
Summary: A carbon foam was fabricated as a scaffold for a dendrite-free and stable Zn anode in aqueous Zn-ion batteries. The carbon foam effectively regulated Zn deposition and alleviated volume expansion, resulting in improved cycling performance and coulombic efficiency.
Article
Biochemistry & Molecular Biology
Lin-Lin Zhou, Wen-Xiong Li, Hai-Bo Zhao, Bin Zhao
Summary: This study compares the actions of Co2+ and Ni2+ transition metal cations in LDHs and investigates their use as flame retardants and smoke suppressants for silicone foam. The results show that the addition of LDHs improves the flame retardancy and fire safety of SiF, with NiAl-LDH being more effective. Co and Ni participate in the formation of protective char layers, inhibiting the release of SiO2 into the gas phase.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Sijia Zheng, Michael A. Brook
Summary: This study demonstrates a method to prepare bleach-containing elastomeric sponges using thiopropyl-modified silicone oils, which can release excess bleach to gradually oxidize organic molecules in aqueous solution. The preparation process is simple and sustainable.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Le Wang, Bingbing Leng, Cengliang Shan, Xu Zhao, Chunhui Zhu, Yang Liu, Hongyan Zhang, Wenge Xu, Baijun Liu
Summary: By studying CSRs containing CP-Allyl, it is found that they exhibit excellent thermal, mechanical, and flame retardant properties, as well as outstanding insulation properties. Even after ablation at high temperatures, the shapes are maintained and hard ceramic phases are formed.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Sofia S. Filippova, Konstantin V. Deriabin, Igor Perevyazko, Olga V. Shamova, Dmitriy S. Orlov, Regina M. Islamova
Summary: Metal- and peroxide-free silicone rubbers were synthesized via a reaction between amino-containing poly(dimethylsiloxanes) and iodine-containing polysiloxanes. The equimolar ratio of NH2 groups to the I-containing moiety (1:1) showed the highest cross-linking density. The obtained silicone rubbers exhibited antibacterial activity against Escherichia coli and Staphylococcus aureus, making them suitable for applications in biomedicine and the food industry as antibacterial coatings and materials.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Michael Yin Wong, Ian L. Vishnu, Robert Bui, Yang Chen, Alyssa F. Schneider, Michael A. Brook
Summary: This study reports a simple and feasible strategy to introduce spatially controlled branching in pure, linear silicone polymers through the Piers-Rubinsztajn reaction, resulting in linear polymers rich in T and Q groups.
Article
Polymer Science
Marta Gallo, Renaud G. Rinaldi
Summary: This study demonstrates the control of spatially graded materials' local properties by manipulating key processing parameters, leading to the possibility of designing architected silicone rubber membranes with spatially controlled mechanical property gradients obtained from a unique macromolecular network.
JOURNAL OF APPLIED POLYMER SCIENCE
(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.