高纯耐热耐碱木聚糖酶预处理对杨木KP浆漂白特性的影响  

The Effect of Thermostable and Alkaline Tolerant Xylanase Pretreatment on the Bleaching Properties of Poplar Kraft Pulp

作　　者：刘婧怡[1] 翟华敏[1] 王楚[1] 戴铠[1] 孙立新[1] 

机构地区：[1]南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京210037

出　　处：《纤维素科学与技术》2012年第2期19-25,共7页Journal of Cellulose Science and Technology

基　　金：国家自然科学基金项目(31070524);江苏省科技创新与成果转化专项(BE2010689);教育部博士学科点专项基金资助项目(20060298007)

摘　　要：研究了耐热耐碱木聚糖酶X对杨木硫酸盐浆预处理的选择性及其对无元素氯(ECF)漂白特性的影响。结果表明:该木聚糖酶预处理具有高的助漂选择性,预处理对纸浆的得率及黏度影响不大;该木聚糖酶对温度及pH的适应范围较广,在温度为75～80℃、pH 8.0～9.5范围内都可以发挥有效的助漂作用,尤其在温度80℃、pH 8.0、酶用量2 IU/g的条件下更能发挥酶效;耐热耐碱木聚糖酶X预处理可减少漂白ClO2用量,当达到对照浆相同白度(90%ISO)时可减少D0段26%～27%的ClO2用量(相当于总用氯量的16%)。The selectivity and its effect of the pretreatment on the elemental clhlorine free （ECF） bleaching properties by a thermostable and alkaline tolerant xylanase X were sLudied. The results show that the pretreatment has high selectivity, without causing an obvious decrease of the pulp viscosity, the effective pretreatment conditions can be varied among 75~80~C and pH 8.0~9.5, and the better pretreatment conditions were 80~C, pH 8.0 and enzymes dosage 2 IU/g. The final brightness of the bleached pulps with the pretreatment by the xylanase X was ] %ISO higher than that unpretreatment bleached pulps （90%ISO brightness）, or the C102 dosage in the Do stage could be saved by 26%-27% to achieve the same brightness （90%ISO） of the unprereatment bleached pulp.

关 键 词：木聚糖酶 无元素氯(ECF)漂白 杨木KP浆 

分 类 号：Q814.9[生物学—生物工程] TS745[轻工技术与工程—制浆造纸工程]