文献类型：期刊文献

英文题名：Study on Surface Properties of Aramid Fiber Modified in Supercritical Carbon Dioxide by Glycidyl-POSS

作者：Li, Yang Luo, Zhu Yang, Le Li, Xiaolong Xiang, Kun

第一作者：Li, Yang;李杨

通信作者：Luo, Z[1]

机构：[1]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, 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, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Guizhou, Peoples R China

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

年份：2019

卷号：11

期号：4

外文期刊名：POLYMERS

收录：;EI(收录号：20192106964973);Scopus(收录号：2-s2.0-85065928590);WOS:【SCI-EXPANDED(收录号:WOS:000467312900129)】；

基金：This work was financially supported by Science Foundation of Guizhou Province (Qian Ke He Ji Chu [2019] 1134), Guizhou Provincial Department of Education Youth Talent Growth Project (Qian Jiao He KY [2016] 225), the National Natural Science Foundation of China (Grant No. 51763004), and Guizhou Provincial Department of Education Youth Talent Growth Project (Qianjiaohe KY [2017] 208).

语种：英文

外文关键词：aramid fiber; glycidyl-POSS; supercritical CO2 processing; graft reaction; interfacial strength

摘要：The outstanding diffusivity and permeability of supercritical carbon dioxide (scCO(2)) are extremely beneficial for grafting reaction. In this work, aramid fibers (AF) are modified in scCO(2) by glycidyl-polyhedral oliomeric silsesquioxane (POSS) with 2-ethyl-4-methylimidazole (2E4MZ) on the basis of cleaning with acetone. The surface morphology and chemical structure of the modified AF were measured and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Scanning electron microscope (SEM), Thermogravimetric (TG), and Atomic force microscope (AFM). The interfacial shear strength (IFSS) was measured by a micro-bond pull-out test, then the modified AF/EP composites were prepared and the interlaminar shear strength (ILSS) was characterized. Research has shown that some of the glycidyl-POSS molecular chains permeated into the surface of the fiber and grafted onto the surface of the AF after modification, and the other glycidyl-POSS self-assembled on the surface of the fiber. XPS indicated the introduction of C-O and -COO-, which confirmed the existence of chemical reactions between AF and glycidyl-POSS. AFM and SEM images revealed that 2E4MZ, not only promoted the grafting reaction of glycidyl-POSS, but also intensified the self-assembly of glycidyl-POSS, both of which increased the roughness of the fiber. A monofilament tensile test and micro-bond pull-out test showed that there was a negative effect on the tensile strength after scCO(2) processing. The tensile strength of modified AF, with glycidyl-POSS, increased the highest strength of 25.7 cN dtex(-1), which was 8% higher than that of pristine AF. The improvement of ILS roughness and the polar chemical groups produced in grafting reaction. These results indicated that AF, treated in scCO(2), with glycidyl-POSS, which is a suitable way of fiber modification, can significantly improve the surface adhesion of AF reinforced composites.