文献类型：期刊文献

英文题名：Enhancement of Interface between Lignocellulosic Fibers and Polypropylene Matrix via the Structure Alteration of Lignin at Elevated Temperatures

作者：Dong, Zhen[1];Li, Na[1];Dong, Aixue[2];Ma, Bomou[3];Yu, Chongwen[3];Chu, Teye[4];Liu, Qixia[1]

机构：[1]Nantong Univ, Coll Text & Apparel, Nantong 226019, Peoples R China;[2]Shaoxing Univ, Key Lab Cleaning Dyeing & Finishing Technol Zheji, Shaoxing 312000, Peoples R China;[3]Donghua Univ, Coll Text, Shanghai 201620, Peoples R China;[4]Jiangxi Enda Technol Co Ltd, Res & Dev Ctr, Xinyu 336600, Peoples R China

年份：2020

卷号：13

期号：23

起止页码：1

外文期刊名：MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000597613500001)、、EI(收录号：20204909579472)、Scopus(收录号：2-s2.0-85097033543)、WOS

基金：This research was funded by China Postdoctoral Science Foundation (2019M652273), Jiangxi Excellent Young Talents Program (20192BCB23030), Jiangxi Provincial Postdoctoral Research Project Merit Funding (2019KY50), Jiangsu Key Research & Development Project (BE2018349) and Inner Mongolia Science and Technology Major Project (ZDZX2018060).

语种：英文

外文关键词：lignocellulose fiber; cellulose; interface; lignin; natural fiber

外文摘要：This paper investigated the feasibility of enhancing the interface between lignocellulosic fibers and a polypropylene matrix via structure alteration of lignin at elevated temperatures. Alkali treatment can remove gum substances from lignocellulose fibers effectively at elevated temperatures but easily causes damages to fiber strength. In previous studies on directional delignification of lignocellulosic fibers, loss of fiber strength is avoided but condensation and degradation of lignin are accelerated. So far, few reports have been available on the effect of lignin structures on the interface between fibers and a matrix. In this study, jute fibers with different lignin structures are produced at 100 and 130 degrees C for reinforcing a polypropylene matrix. The interface between the fibers and matrix is analyzed. The result shows that decrease in aliphatic hydroxyl concentration by 9.5% at 130 degrees C from 3 to 5 h contributes to a 14.2% decrease in the surface energy of jute fibers. Meanwhile, the polydispersity index of lignin decreases from 1.21 to 1.15. Centralized distribution of lignin molecule-weight and reduction in fiber surface energy improves the interface between the fibers and matrix, which manifests as a 30.8% increase in the impact strength of the composites. Similar improvement is not observed in the composites reinforced with jute fibers at 100 degrees C, due to the absence of lignin-structure changes. This paper provides a new strategy to improve the interface between lignocellulose fibers and a hydrophobic matrix.