木聚糖酶处理尾巨桉KP-AQ浆工艺条件的研究  

An optimum process of biobleaching pretreating KP-AQ pulp of Eucalyptus urophylla×E.grandis using xylanase.

作　　者：姚春丽[1] 谈滔[1] 张莹[1] 

机构地区：[1]北京林业大学材料科学与技术学院,林业生物质材料与能源教育部工程研究中心

出　　处：《北京林业大学学报》2009年第S1期156-160,共5页Journal of Beijing Forestry University

基　　金："948"国家林业局引进项目(2006-4-96)

摘　　要：该文首次将Thermomyces lanuginosus产商业用木聚糖酶用于漂白阔叶木尾巨桉硫酸盐浆,摸索出其较佳的漂白工艺条件:酶用量10 U/g,反应时间90 min,处理温度60℃,pH值6.0,浆浓度10%。在该条件下,生物预处理纸浆的白度为55.2%,比氧处理后的浆上升了3.7%,卡伯值下降为8.38;纸浆黏度为990 mL/g,比氧处理后的浆有所提高。与未经处理的对照浆相比,纸浆经过木聚糖酶预处理再接不同后续漂白,纸浆卡伯值下降,白度有所上升。Xylanase from Thermomyces lanuginosus was used to bleach KP-AQ pulp of Eucalyptus urophylla×E.grandis for the first time.The optimum conditions to pretreat E.urophylla×E.grandis were: xylanase 10?U?g,reaction time 90?min,temperature 60℃,pH 6.0 and pulp density 10%.Under these conditions,the pulp brightness was 55.2% ISO;compared to the control pulp,the brightness of it increased by 3.7% and its Kappa value decreased to 8.38;and the viscosity was 990?mL?g,slightly higher than that of oxygen delignification lignin.Compared to the no-pretreated pulp,the biobleaching by xylanse can impove the pulp bleaching ability to some degree;Kappa value of pulp decreased and the brightness increased.

关 键 词：尾巨桉 木聚糖酶 白度 卡伯值 黏度 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]