改良木聚糖酶辅助漂白芦苇浆的工艺研究  

Technological research on biobleaching effect of reed pulp boosted by modified xylanase

作　　者：欧阳嘉[1] 连之娜[1] 林惊雷[1] 李鑫[1] 宋向阳[1] 

机构地区：[1]南京林业大学化学工程学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2012年第2期25-28,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金项目(31070513);国家重点基础研究发展计划(2007CB707801);江苏省高校自然科学研究重大项目(10KJA22019)

摘　　要：采用分子改良后的木聚糖酶对芦苇浆进行生物预处理,考察了改良木聚糖酶辅助漂白的效果。结果表明,酶预处理可以降低CEH三段漂白中氯化C段的氯气用量60%。改良木聚糖酶预处理辅助漂白芦苇纸浆最佳条件为:pH为7.0,温度60℃,浆浓(质量分数)5%,酶用量12μmol/(min.g),预处理时间60 min。在此条件下C段氯用量降至对照的40%时,酶处理漂后样品白度可达到84.0%(ISO),高出对照样的白度3.7%(ISO)。改良木聚糖酶预处理还能够改善纸浆漂后样的物理性能。Reed pulp was pretreated with modified xylanase,and the potential application of modified xylanase in reed pulp biobleaching was evaluated.The results indicated that modified xylanase could reduce chlorine dosage in C-stage up to 60 %.The optimum pretreatment conditions of reed pulp with modified xylanase were as follows： pH 7.0,temperature 60 ℃,pulp consistency 5 %,enzyme dosage 12 μmol/（min·g） and time 60 min.When chlorine consumption in stage C was reduced by 40 % during bleaching,the brightness of bleached pulps from the xylanase pretreated reed pulp reached to 84.0 %（ISO）,which increased 3.7 %（ISO） than that of the control.The enzymatic pretreatment with modified xylanase also improved properties of bleached pulp.

关 键 词：芦苇浆 改良木聚糖酶 预处理 生物漂白 

分 类 号：TQ352[化学工程] TS745[轻工技术与工程—制浆造纸工程]