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    Tween 80 enhancing cellulasic activation of hardwood kraft-based dissolving pulp

    Year: 2019

    Journal: Ind. Crop. Prod., Volume 137, OCT 1, page 144–148

    Authors: Liu, Shanshan; He, Huili; Fu, Xin; Wang, Yingchao; Wang, Qiang; Yang, Guihua; Chen, Jiachuan; Ni, Yonghao

    Organizations: National Key R&D Program of China [2017YFB0307900]; National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670584]; Excellent Young Scientist Fund of Shandong Province [ZR2018JL015]; Taishan scholar project special funds; State Key Laboratory of Pulp and Paper Engineering; Chinese Scholarship Council (CSC)China Scholarship Council; Canada Research Chairs programCanada Research Chairs

    Keywords: Dissolving pulp; Cellulase; Tween 80; Viscosity; Reactivity

    Cellulase treatment is a promising approach to activate dissolving pulp in terms of viscosity and reactivity. However, the enzyme cost is still too high, which hinders the scale up application. In this study, Tween 80 was introduced into the enzymatic system for improving the cellulase efficiency by improving the enzyme accessibility and its stability. Results show that the cellulose chain scission rate was more than 2 times higher with the addition of Tween 80 (0.1 g/L) in comparison to the control, which is mainly attributed to decreased surface tension (by 28.0% with the addition of 0.1 g/L Tween) and increased relative cellulase activity (by 9% at 48 h and 55 degrees C). As a result, Tween 80 assisted cellulase activation gave a higher cellulasic efficiency in terms of viscosity decrease and Fock reactivity increase. Other pulp properties (alkali solubility, molecular weight distribution) and pulp yield were all favorable, supporting the conclusion that the Tween 80- assisted cellulase treatment process has a great potential to improve the cellulase treatment performance of dissolving pulp.
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