Hemicelluloses removal in autohydrolysis pretreatment enhances the subsequent alkali impregnation effectiveness of poplar sapwood
Hemicelluloses removal in autohydrolysis pretreatment enhances the subsequent alkali impregnation effectiveness of poplar sapwood
复制标题
自水解预处理中半纤维素的去除增强了杨边材随后的碱浸渍效果
DOI：
10.1016/j.biortech.2016.10.017
复制
发表时间：
2016-12-01
影响因子：
11.4
通讯作者：
Qin, Qiong
中科院分区：
文献类型：
--
作者：
Jiang, Xiaoya;Hou, Qingxi;Qin, Qiong
研究了白杨边材自水解液中半纤维素含量的变化对碱法化学机械制浆的影响。以不同半纤维素含量的白杨边材自水解液为原料，进行碱浸渍处理。结果表明，随着半纤维素的去除，白杨边材的碱耗量和膨胀度均增加，碱浸效果增强。半纤维素的去除还可以缩短自水解白杨边材的碱浸渍时间，达到与未自水解白杨边材相似的浸渍效果。所有这些都可以归因于半纤维素去除将导致纤维素上更多的游离羟基暴露和纤维细胞壁的孔隙率增加的事实。(C)2016爱思唯尔有限公司版权所有
This work is aimed at investigating the influence of changes in the content of hemicelluloses of the autohydrolyzed poplar sapwood on the subsequent alkali impregnation for chemi-mechanical pulping (CMP). An alkali impregnation process was conducted using the autohydrolyzed poplar sapwood with different content of hemicelluloses as raw materials. The results showed that both the amount of NaOH consumption and swelling degree of poplar sapwood increased with the removal of hemicelluloses, thus enhancing the alkali impregnation effectiveness. The hemicelluloses removal can also shorten the alkali impregnation time for the autohydrolyzed poplar sapwood to achieve the similar impregnation effectiveness of unautohydrolyzed poplar sapwood. All of these can be attributed to the fact that the hemicelluloses removal would result in the exposure of more free hydroxyl groups on the cellulose and an increase in the porosity of the fiber cell walls. (C) 2016 Elsevier Ltd. All rights reserved.