文献类型：期刊文献

英文题名：Influence of polyamide acid coating reaction on the properties of aramid fibre

作者：Li, Yang Luo, Zhu Yang, Le Luo, Yongmei Li, Qing Zhang, Luyao Xiang, Kun

第一作者：李杨;Li, Yang

通信作者：Luo, Z[1]

机构：[1]Guizhou Univ, Dept Polymer Mat & Engn, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Sch Mat Sci & Met Engn, Guiyang 550003, Guizhou, Peoples R China;[3]Guizhou Educ Univ, Sch Phys & Elect Sci, Guiyang 550018, Guizhou, Peoples R China

第一机构：Guizhou Univ, Dept Polymer Mat & Engn, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Dept Polymer Mat & Engn, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China.

年份：2019

卷号：178

外文期刊名：POLYMER

收录：;EI(收录号：20193007240265);Scopus(收录号：2-s2.0-85069673106);WOS:【SCI-EXPANDED(收录号:WOS:000483922700032)】；

基金：This work was financially supported by the Natural Science Foundation of Guizhou Province (Grant No. Qian ke he ji chu [2019] 1134, the National Science Foundation of China (Grant No. 51763004), Guizhou Provincial Department of Education Youth Talent Growth Project (Qian jiao he KY [2016] 225 and Qian jiao he KY [2017] 208) and Grant No. Qian ke he LH [2016] 7100).

语种：英文

外文关键词：Aramid fibre; Polyamide acid; Oxidation; Graft reaction; Interfacial shear strength

摘要：The interfacial properties of aramid fibres (AFs) affect their mechanical behaviours. In this work, polyamide acid (PAA) was grafted onto the surface of aramid fibres (AF@PAA) to reinforce epoxy resin (EP E44) by improving the interfacial properties. The AF@PAA contained many active groups and improved the roughness of aramid fibres on the surface, which improved the interfacial performance and mechanical properties of AF-reinforced E44 composites. FTIR and XPS showed the introduction of C-O and -COO-, which confirmed the existence of chemical reactions among groups between the aramid fibres and polyamide acid. A micro-droplet test proved that the benzene ring of the AF could be oxidized under high temperature, and the oxygen-containing groups generated during the oxidation process were important for the grafting process of polyamide acid. The interfacial shear strength (IFSS) increased by 40.7% after treatment with 5 wt% polyamide acid. This study provides a feasible method for interfacial modification in AF-reinforced epoxy resin composites and may be applicable to rubber composite systems.