Preparation of Dissolving Pulp Made from Poplar Residual Slabs and Effect of Xylanase Post-treatment on Its Reactivity

BioResources

Ronggang Li¹  Lijuan Bing¹  Shufang Zhou²  Chaojun Wu²  Dongmei Yu² 

[1] China;Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Ji’nan, China;

关键词: Pre-hydrolysis;    Kraft cooking;    TCF bleaching;    Poplar residual slab;    Dissolving pulp;    Xylanase;   

DOI  :  10.15376/biores.10.1.423-431

来源: DOAJ

【 摘 要 】

The production of dissolving pulp from poplar wood residual slabs was investigated. The residual slab chips were initially prehydrolyzed and subsequently pulped by the kraft process; the resulting brownstock was bleached using a totally chlorine-free (TCF) sequence to full brightness. The pulp contained low pentosans and high α-cellulose content, and the pulp had high reactivity. Its hemicellulose content, reactivity, and degree of polymerization were within acceptable levels for a rayon-grade dissolving pulp. Thus, the residual slabs from poplar can be regarded as a viable raw material for dissolving pulp production. The reactivity of this dissolving pulp was drastically decreased after the xylanase post-treatment, which can slightly lower the pentosans levels. Simultaneously, the crystallinity index of the resulting pulp obviously decreased after xylanase post-treatment.

【 授权许可】

Unknown