文献类型：期刊文献

英文题名：Effects of cold plasma treatment on the surface and properties of poly(lactic acid) fibers

作者：Xu, Yiqing[1];Liu, Haiyan[1];Ying, Shuni[2];Lin, Qunfang[3];Ma, Huihuang[1];Zhou, Xiaodong[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Weixing New Bldg Mat Co LTD, Shanghai 201400, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：18

期号：11

起止页码：1164

外文期刊名：EXPRESS POLYMER LETTERS

收录：;EI(收录号：20243917098119);WOS:【SCI-EXPANDED(收录号:WOS:001310586800008)】；

基金：This research was supported by 'Fundamental Research Funds for the Central Universities'.

语种：英文

外文关键词：PLA fiber; cold plasma treatment; tensile strength; surface morphology

摘要：This study examines the interface of biodegradable polylactic acid (PLA) fiber-reinforced thermoplastic starch composites to address market demand for their mechanical properties. We first used a combination of solution treatment (acid/alkali) and plasma modification to modify fibers. This method improves surface roughness and increases oxygen-containing groups of the fibers, which enhances the mechanical interlocking at the interface and promotes stronger hydrogen bonds between fibers and starch, respectively. Their synergy effect significantly strengthens interfacial adhesion and interfacial shear strength (IFSS). In contrast, cold plasma modification alone results in a smaller increase in IFSS because of its lower roughness and fewer oxygen-containing groups. Alkaline treatment and increased cold plasma power level are more conducive to higher IFSS through stronger synergistic effects. Although IFSS improved from 2.41 to 4.40 MPa after alkali and plasma treatments of 200 W, the tensile strength decreased from 811.46 to 351.55 MPa. To optimize the mechanical properties of composite materials, it is crucial to choose a kind of modification method that balances IFSS enhancement and tensile strength reduction.