西北林学院学报2017，Vol.32Issue(5)：208-212,288,6.DOI:10.3969/j.issn.1001-7461.2017.05.35
纤维素酶提高竹溶解浆反应性能的研究
Enhancement of Bamboo Kraft-based Dissolving Pulp Reactivity by Cellulase Treatment
摘要
Abstract
Cellulose reactivity plays an important role in the production of viscose rayon.The cellulase treatment was adopted to improve the reactivity of bamboo dissolving pulp.The effects of cellulase dosage,reaction time and pulp consistency on the degree of polymerization,Fock reactivity,α-cellulose and pulp yield were studied in order to reveal the mechanism of the reactivity improvement.The results showed that cellulase dosage 0.10 U/g,enzymatic treating time 60 min,pulp consistency 5％ were chosen as the optimal conditions based on the conditions of pH 4.6 and temperature 55℃.As a consequence,promising results were obtained after the cellulase treatment.The Fock reactivity increased from 69.5％ to 88.2％ and only a modest cellulose degradation was obtained,while the degree of polymerization decreased only from 643 to 593.The results of other properties including α-cellulose,yield and molecular weight distribution also supported these conclusions.These results were mainly due to the effects of etching or peeling of fibers primary wall during the cellulase treatment,thus opening up cellulose structure and increasing the accessibility of fibers.The enhancement of accessibility of enzymatic treated pulp was supported by the test results from BET specific surface area,scanning electron microscope and gel permeation chromatography methods.关键词
竹溶解浆/纤维素酶/反应性能/聚合度/可及度Key words
bamboo dissolving pulp/cellulase treatment/reactivity/degree of polymerization/accessibility分类
化学化工引用本文复制引用
陈秋艳,苗庆显,马晓娟,黄六莲..纤维素酶提高竹溶解浆反应性能的研究[J].西北林学院学报,2017,32(5):208-212,288,6.基金项目
国家自然科学基金(31500488) （31500488）
福建省自然科学基金面上项目(2015J01074) （2015J01074）
中央财政林业科技推广示范项目([2014]YC12) （[2014]YC12）
福建省产业技术联合创新专项([2014]514). （[2014]514）
