Effect of autohydrolysis on the wettability, absorbility and further alkali impregnation of poplar wood chips.
Effect of autohydrolysis on the wettability, absorbility and further alkali impregnation of poplar wood chips.
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DOI：
10.1016/j.biortech.2016.05.096
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发表时间：
2016-09
影响因子：
11.4
通讯作者：
N. Xu;W. Liu;Q. Hou;Peiyun Wang;Zhirong Yao
中科院分区：
文献类型：
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作者：
N. Xu;W. Liu;Q. Hou;Peiyun Wang;Zhirong Yao
在制浆前对杨木片进行不同程度的自水解，然后研究杨木片的润湿性、吸收性以及随后的 NaOH 溶液浸渍性。结果表明，经过自水解预处理后，杨木片的孔隙率、收缩率和纤维饱和点（FSP）均增加，而表面接触角随着严重度因子的增加而减小。自水解木片在浸渍过程中吸收了更多的NaOH，导致本体浸渍液（即木片外部的浸渍液）中的NaOH浓度较低，而截留液（即木片内部的浸渍液）中的NaOH浓度增加。自水解显着提高了碱浸渍的效果。
Autohydrolysis with different severity factors was performed on poplar wood chips prior to pulping, and the wettability, absorbility and the following impregnation of NaOH solution for the poplar wood chips were then investigated. The results showed that after autohydrolysis pretreatment the porosity, shrinkage and fiber saturation point (FSP) of the poplar wood chips were increased, while the surface contact angle decreased as the severity factor was increased. The autohydrolyzed chips absorbed more NaOH in impregnation that resulted in a low NaOH concentration in the bulk impregnation liquor (i.e., the impregnation liquor outside wood chips), while the concentration in the entrapped liquor (i.e., the impregnation liquor inside wood chips) was increased. Autohydrolysis substantially improved the effectiveness of alkali impregnation.