林产化学与工业2017，Vol.37Issue(3)：38-44,7.DOI:10.3969/j.issn.0253-2417.2017.03.005
亚氯酸盐预处理杉木细胞壁木质素溶解机理研究
Dissolution Mechanism of Lignin in Chinese-fir Cell Walls During Chlorite Pretreatment
摘要
Abstract
Chlorite pretreatment can selectively remove lignin of cell walls and release cellulose and hemicellulose,which can provide the potential for converting to energy resource,chemical products and biomaterials.In order to study the mechanism of delignification,the dynamic changes of lignin distribution and content in Cunninghamia lanceolata (Lamb.) Hook (Chinese fir)cell walls during chlorite pretreatment were investigated by confocal Raman microscopy (CRM) and ultraviolet spectroscopy.The results showed that the lignin dissolution during the chlorite pretreatment could be clearly divided into four stages:slight removal of lignin (Ⅰ),slow penetration of liquid (Ⅱ),rapid dissolution of lignin (Ⅲ),and the equilibrium phase of delignification (Ⅳ).Although the lignin distributed distinctly in morphological regions,i.e.,cell comer (CC),compound middle lamella (CML),and secondary wall(SW),the distributions were inhomogeneous.Therefore,the removal rates in these areas were different and followed the decreasing order of cell corner ＞ compound middle lamella ＞ secondary wall.关键词
杉木/亚氯酸盐预处理/共聚焦拉曼显微光谱/木质素/溶解Key words
Chinese fir/chlorite pretreatment/confocal Raman microscopy/lignin/dissolution分类
化学化工引用本文复制引用
吴博士,张逊,杨俊,许凤..亚氯酸盐预处理杉木细胞壁木质素溶解机理研究[J].林产化学与工业,2017,37(3):38-44,7.基金项目
教育部科技计划重点项目(113014A) （113014A）
