纤维素科学与技术2012，Vol.20Issue(2)：32-39,8.
漆酶和木聚糖酶预处理对麦草浆漂白性能的影响
Effect of Laccase and Xylanase Pretreatment on Bleachability of Wheat Straw Pulp
摘要
Abstract
The purpose of biobleaching is to reduce bleaching agent dosage in following bleaching process, to decrease environment pollution and to improve pulp properties by means of pulp enzymatic pretreatment. The effects of wheat straw pulp pretreatment with laccase/xylanase system （LXS） and recombinant xylanase （X） respectively on bleachability ofptLlp were compared in this paper. The results indicated as follows. The kappa number of pulps after pretreatment with laccase/xylanase system or recombinant xylanase decreased, but the kappa number of pulp pretreated with LXS decreased obviously. It decreased by 32.64% and 6.47% respectively compared with original pulp and X pretreated pulp. More reducing sugar content was determined in the solution pretreated with X. The chlorine dosage could be decreased by 50% after LXS or X pretreatment following bleaching process compared with control pulp at close brightness and the physical strength of pulps was improved. While effect of two enzymes on pulp laleachabilities was compared, the brightness of pulp pretreated with X was better, but the strength and yield of pulp were lower. The crystal structure of cellulose did not change after LXS and X pretreatment, at the same time the crystallinity of cellulose increased slightly. The scanning electron microscope （SEM） images and X-ray photoelectron spectroscopy （XPS） analysis of two enzym, es treatment pulps further explained theoretically the delignification difference between LXS and X pretreatment.关键词
漆酶/木聚糖酶体系/重组木聚糖酶/脱木素/漂白性能Key words
laccase/xylanase system/recombinant xylanase/delignification/bleachability分类
生物科学引用本文复制引用
连海兰,连之娜,王玉秀,欧阳嘉,尤纪雪..漆酶和木聚糖酶预处理对麦草浆漂白性能的影响[J].纤维素科学与技术,2012,20(2):32-39,8.基金项目
国家自然科学基金资助项目 （）
国家863计划资助项目（2007AA02Z213）的部分研究内容 （）
江苏高校优势学科建设工程资助项目 （）
