文献类型：期刊文献

英文题名：New strategy for grafting hydrophobization of lignocellulosic fiber materials with octadecylamine using a laccase/TEMPO system

作者：Dong, Aixue[1];Teklu, Kidanu Masho[1];Wang, Weiming[1];Fan, Xuerong[2];Wang, Qiang[2];Ardanuy, Monica[3];Dong, Zhen[4]

机构：[1]Shaoxing Univ, Key Lab Cleaning Dyeing & Finishing Technol Zheji, Shaoxing 312000, Zhejiang, Peoples R China;[2]Jiangnan Univ, Key Lab Ecotext, Minist Educ, Wuxi 214122, Jiangsu, Peoples R China;[3]Univ Politecn Cataluna, Dept Mat Sci & Engn, Text Engn Sect, Barcelona, Spain;[4]Nantong Univ, Sch Text & Clothing, Nantong 226019, Jiangsu, Peoples R China

年份：2020

卷号：160

起止页码：192

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：SCI-EXPANDED(收录号：WOS:000566787400002)、、Scopus(收录号：2-s2.0-85085607812)、WOS

基金：The work was funded by Zhejiang Provincial Natural Science Foundation of China (LGG18E030005), Fundamental Research Funds for the Central Universities (JUSRP51717A), China Postdoctoral Science Foundation (2019M652273), Jiangxi Excellent Young Talents Program (20192BCB23030), Jiangsu Key Research & Development Plan (BE2018349) and Open Project Program of Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University (KLET1703).

语种：英文

外文关键词：Lignocellulose; Laccase/TEMPO; Grafting functionalization

外文摘要：The enzymatic functionalization of lignocellulosic fibers using oxidoreductases was successfully achieved by targeting lignin moieties as grafting sites on the surface. In this study, a novel strategy for hydrophobization of lignocelluloses was investigated, which involved the laccase/TEMPO-mediated grafting of octadecylamine (OA) onto both lignin and cellulose components of jute fabrics. The results showed that OA monomers were successfully grafted onto jute fabric surface using the laccase/TEMPO system with the grafting percentage and efficiency values of 0.712% and 10.571%, respectively. The primary hydroxyl groups of cellulose were oxidized by laccase/TEMPO to carbonyl groups, which were then coupled with amino-contained OA monomers via Schiff base reaction. The phenolic hydroxyl groups of lignin were transformed by laccase to radicals, on which OA molecules were grafted via Michael addition reaction. Consequently, grafted jute fabrics showed a considerable increase in the surface hydrophobicity with a contact angle of 125.9 degrees and a wetting time of at least 2 h. Furthermore, there was an acceptable decrease in the breaking strength of jute fabrics by 13.60%, and the color of fabrics turned yellowish and reddish. This eco-friendly enzymatic process provides a new strategy for grafting hydrophobization and even functionalization of lignocellulosic fiber materials using amino compounds. (C) 2020 Published by Elsevier B.V.