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Study on Improving the Properties of Dissolving Pulp by Cellulase and Xylanlase Treatment
  
DOI:10.11980/j.issn.0254-508X.2018.05.001
Key Words:dissolving pulp  cellulase  xylanase  Fock reactivity  α-cellulose content
Author NameAffiliation
TIAN Chao1,2,* 1.Shandong SUN Paper Co.,Ltd. Yanzhou Shandong Province 272100
2. China National Pulp and Paper Research Institute Co., Ltd. Beijing 100102 
SHI Yu2 2. China National Pulp and Paper Research Institute Co., Ltd. Beijing 100102 
ZHAI Bing-yan1 1.Shandong SUN Paper Co.,Ltd. Yanzhou Shandong Province 272100 
QIAO Jun1 1.Shandong SUN Paper Co.,Ltd. Yanzhou Shandong Province 272100 
YING Guang-dong1 1.Shandong SUN Paper Co.,Ltd. Yanzhou Shandong Province 272100 
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Abstract:In this study, the effect of cellulase and xylanase treatment of hardwood dissolving pulp on its α-cellulose content、 degree of polymerization(DP) and reaction property were studied. In addition, the influence of the treatment of dissolving pulp from modified softwood pulp by cellulase using various cellulase dosages, treatment time and pulp consistency on its reactivity, α-cellulose content and DP were investigated. The results showed that cellulase treatment could improve the reactivity of hardwood dissolving pulp from 40.57% to 48.20% at the dosage of 2 HCU/g and it did not significantly affect the α-cellulose content and polymerization degree of the pulp. The α-cellulose content of hardwood dissolving pulp could be improved from 93.08% to 95.14% with xylanase treatment at the dosage of 200 XU/g. The reactivity of dissolving pulp from modified softwood pulp was improved from 13.50% to 49.75% with cellulase treatment at dosage of 50 HCU/g. It was found that increasing the cellulase dosage and extending the treatment time could improve the reactivity effectively. However, there was no obvious difference with varying the pulp consistency during cellulase treatment.
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