文献类型：期刊文献

英文题名：Morphology and supramolecular structure characterization of cellulose isolated from heat-treated moso bamboo

作者：Huang, Yuxiang[1] Meng, Fandan[1] Liu, Ru[1] Yu, Yanglun[1] Yu, Wenji[1]

第一作者：黄宇翔

通信作者：Yu, YL[1];Yu, WJ[1]|[a0005b92a29b9f40edd99]余养伦;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Hunan Collaborat Innovat Ctr Effect Utilizing Woo, Xiangshan Rd, Beijing 100091, Peoples R China

年份：2019

卷号：26

期号：12

起止页码：7067-7078

外文期刊名：CELLULOSE

收录：;EI(收录号：20192907190754);Scopus(收录号：2-s2.0-85068858036);WOS:【SCI-EXPANDED(收录号:WOS:000477863700004)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 31870550, 31470591).

语种：英文

外文关键词：Bamboo; Cellulose; Heat treatment; Supramolecular structure; Morphology

摘要：The change of physical and mechanical properties of bamboo after heat treatment has become a research hotspot recently. However, bamboo was usually used as a whole to investigate the reason why its properties changed. This study focused on cellulose, the skeleton substance of bamboo cell wall. Changes in morphology and supramolecular structure of cellulose isolated from heat-treated moso bamboo were investigated. The results showed bamboo cellulose after heat treatment was more prone to structure changes when treated with alkali solution. Taking the cellulose sample isolated from 200 degrees C heat-treated bamboo as an example, its X-ray crystallinity index of cellulose increased from 70.5% for the untreated sample to 75.6% for the sample heated to 200 degrees C including both cellulose I and II peaks. Based on CP/MAS 13C NMR measurements, the cellulose I-alpha/cellulose I-beta ratio decreased from 28 to 22% and the cellulose I/cellulose II ratio decreased from 162 to 49%. These changes in supramolecular structure caused the morphology to suffer tremendous changes, where the cellulose in fibers became shorter, thinner and twisted and the cellulose in parenchyma cells shrunk.