文献类型：期刊文献

英文题名：Influence of aramid fibers modified by glycidyl polyhedral silsesquioxane assisted with supercritical carbon dioxide on the properties of aramid fiber-reinforced styrene butadiene rubber composites

作者：Li, Yang Shi, Caiwen Pan, Xiaoli Yang, Le Zhang, Chun

第一作者：李杨;Li, Yang

通信作者：Zhang, C[1]|[14440f6a6d277849ce3bf]张纯;

机构：[1]Guizhou Inst Technol, Sch Mat Sci & Energy Engn, Guiyang, Peoples R China;[2]Guizhou Coll & Univ Proc Ind New Proc Engn Res Ctr, Guiyang, Peoples R China;[3]Guizhou Inst Technol, Sch Mat Sci & Energy Engn, Doctor Rd, Dangwu, Guizhou, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat Sci & Energy Engn, Doctor Rd, Dangwu, Guizhou, Peoples R China.|贵州理工学院;

年份：2024

外文期刊名：POLYMER INTERNATIONAL

收录：;EI(收录号：20240515481524);Scopus(收录号：2-s2.0-85183642744);WOS:【SCI-EXPANDED(收录号:WOS:001150629800001)】；

基金：The authors gratefully acknowledge the National Natural Science Foundation of China (grant no. 52363009) and Guizhou Colleges and Universities Process Industry New Process Engineering Research Center (Qian Jiao Ji [2022] 034).

语种：英文

外文关键词：aramid fiber; glycidyl POSS; interfacial adhesion; styrene butadiene rubber; supercritical carbon dioxide

摘要：The weak interfacial adhesion of aramid fibers (AFs) in rubber composites can be improved by modifying their surface structure. Herein, modified AFs with a high grafting rate were prepared by modification using glycidyl polyhedral silsesquioxane (POSS) assisted with supercritical carbon dioxide (scCO2). X-ray photoelectron spectroscopy confirmed the chemical bonding between AFs and glycidyl POSS. Thermogravimetric analysis and scanning electron microscopy images showed that POSS was grafted uniformly and the surface roughness enhanced obviously. After grafting the rubber with 5 wt% glycidyl POSS assisted with scCO2, the surface grafting rate reached 12.26% and surface crystal spacing increased. The grafted layer on the modified AF surface was uniform, and the tensile strength of the modified fiber increased by 7.98%. Short AF-reinforced carbon black/styrene butadiene rubber (AF/CB/SBR = 2/50/100 phr) composites were prepared to investigate the adhesion strength between modified AFs and SBR. The reduction in tan delta of the composites confirmed the improvement in the interfacial adhesion strength. The tensile strength and modulus at 100% elongation of the composites increased by 15.13% and 25.77%, respectively, and the relative interface slip increased by 23.26%. Moreover, the cutting resistance of the composites showed a dramatic improvement, particularly for grafting with 5% glycidyl POSS assisted with scCO2. (c) 2024 Society of Industrial Chemistry. Aramid fibers were modified by glycidyl POSS assisted with supercritical carbon dioxide to enhance the interfacial adhesion between aramid fibers and styrene butadiene rubber, thus the mechanical properties being improved. image