文献类型：期刊文献

英文题名：Improving cellulose nanofibrillation of waste wheat straw using the combined methods of prewashing, p-toluenesulfonic acid hydrolysis, disk grinding, and endoglucanase post-treatment

作者：Bian, Huiyang[1] Gao, Ying[1] Yang, Yiqin[1] Fang, Guigan[2] Dai, Hongqi[1]

第一作者：Bian, Huiyang

通信作者：Dai, HQ[1]

机构：[1]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, China Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2018

卷号：256

起止页码：321-327

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000428043000041)】；

基金：This work was financially supported from the National Natural Science Foundation of China (Project No. 31470599) and the Doctorate Fellowship Foundation of Nanjing Forestry University. The authors also thank Jing Yang and Buhong Gao of Nanjing Forestry University for SEM and AFM analyses, respectively.

语种：英文

外文关键词：Waste wheat straw; Prewashing; p-Toluenesulfonic acid hydrolysis; Delignification; Endoglucanase post-treatment; Cellulose nanofibrillation

摘要：Here we established a new approach for improving the cellulose nanofibrillation of high ash content waste wheat straw (WWS). The results were comprehensively elucidated from the ash removal, delignification, mechanical fibrillation and endoglucanase post-treatment. When water dosage was increased from 50 to 500 times of the WWS weight, the ash content gradually decreased during prewashing process, which facilitated lignin solubilization in subsequent p-toluenesulfonic acid (p-TsOH) hydrolysis. Approximately 80% of lignin in prewashed WWS could be dissolved during acid hydrolysis to result in a relatively higher crystallinity of 59.1%. Compared with the lignocellulosic nanofibrils (LCNF) directly obtained using acid hydrolysis and disk grinding, prewashing-assisted acid hydrolyzed WWS was fibrillated into LCNF with smaller height of 57.0 nm. Mild endoglucanase post-treatment could further produce less entangled LCNF with thinner diameters. In short, this study presented a promising and green pathway to achieve an efficient utilization of agricultural residue wastes to cellulose nanomaterials.