文献类型：期刊文献

英文题名：Lignocellulosic nanofibrils produced using wheat straw and their pulping solid residue: From agricultural waste to cellulose nanomaterials

作者：Bian, Huiyang[1] Gao, Ying[1] Luo, Jing[2] Jiao, Liang[1] Wu, Weibing[1] Fang, Guigan[3] Dai, Hongqi[1]

第一作者：Bian, Huiyang

通信作者：Dai, HQ[1]

机构：[1]Nanjing Forestry Univ, Jiangsu Prov Key Lab Pulp & Paper Sci & Technol, Nanjing 210037, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, China Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2019

卷号：91

起止页码：1-8

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20191706840732);Scopus(收录号：2-s2.0-85064694265);WOS:【SCI-EXPANDED(收录号:WOS:000473378700001)】；

基金：This work was supported by the National Natural Science Foundation of China (Project No. 31470599) and the Doctorate Fellowship Foundation of Nanjing Forestry University. We also would like to acknowledge Jing Yang and Buhong Gao of Advanced Analysis & Testing Center, Nanjing Forestry University for providing valuable guidance on the use of SEM and AFM, respectively, and Jiahui Xu of Nanjing Forestry University for schematic illustration design.

语种：英文

外文关键词：Agricultural residue waste; Wheat straw; Waste wheat straw; Delignification; Mechanical fibrillation; Lignocellulosic nanofibrils

摘要：Each year millions of tons of agricultural wastes are produced, however, not well utilized in China. Considering the economic development and environmental protection, the valorization of these wastes is increasingly necessary and important. Here we used p-toluenesulfonic acid hydrolysis followed by mild disk grinding for on-farm valorization of wheat straw (WS) and their pulping solid residue (waste wheat straw, WWS) to produce lignocellulosic nanofibrils (LCNF). Alkaline peroxide post-treatment was further conducted to obtain purified lignocellulosic nanofibrils (P-LCNF) with lower lignin content and thinner diameters. The raw materials and resulting LCNF and P-LCNF were investigated in each process for their chemical component, crystal structure, morphology, and thermal properties. Interestingly, although WS fiber had higher lignin content than WWS fiber, the WS fiber with lower ash content resulted in LCNF and P-LCNF with smaller height and lower thermal stability, but higher crystallinity and higher specific surface area. Higher ash content in WWS fiber protected cellulose and lignin from depolymerization and degradation, respectively, which endowed LCNF and P-LCNF with entangled network structure. Overall, this study indicated that the low-temperature fractionation process on WS and WWS fibers could yield cellulose' nanomaterials with potential value-added application and achieve the efficient utilization of agricultural wastes. (C) 2019 Elsevier Ltd. All rights reserved.