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  • Title: Effect of autohydrolysis on the wettability, absorbility and further alkali impregnation of poplar wood chips.
    Author: Xu N, Liu W, Hou Q, Wang P, Yao Z.
    Journal: Bioresour Technol; 2016 Sep; 216():317-22. PubMed ID: 27259186.
    Abstract:
    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.
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