木聚糖酶预处理漂白阔叶木硫酸盐浆  

Xylanase Pretreatment of Bleached Hardwood Kraft Pulp

作　　者：韩卿[1] 文小莉[1] 张茹[1] 邓军军[1] 侯广强[1] 林一涛[1] 

机构地区：[1]陕西科技大学,陕西西安710021

出　　处：《纸和造纸》2013年第2期60-64,共5页Paper and Paper Making

基　　金：陕西科技大学研究生创新基金资助~~

摘　　要：对漂白阔叶木硫酸盐浆进行木聚糖酶预处理试验,探讨酶用量、pH值、浆浓和时间对浆料聚戊糖、α-纤维素、白度、灰分、聚合度和得率的影响。结果表明,木聚糖酶预处理漂白阔叶木硫酸盐浆的适宜工艺条件为:酶用量9U·g-1,pH8.0,浆浓7.0%,反应时间60min;浆料性能:α-纤维素90.06%,聚合度732,聚戊糖7.01%,白度85.45%ISO,灰分0.31%,得率88.61%。为了满足溶解浆的质量要求,在木聚糖酶预处理漂白阔叶木硫酸盐浆的同时进行了碱处理,结果表明,随着碱质量分数的增加,浆料α-纤维素增加,聚戊糖、聚合度和灰分下降,经过木聚糖酶协同碱处理浆料后,漂白阔叶木硫酸盐浆能够满足短纤溶解浆粕的要求。In this paper, we used the method of orthogonal experiments and single factor experiments, the effects of enzyme dosage, pH value, the pulp concentration and the time on pentosan content, α-cellulose content, whiteness, ash, the average degree of polymerization and the yield were mainly investigated after xylanase treatment of bleached kraft hardwood pulp, qqae experimental results showed that the optimum parameters of enzyme treatment process were as followed： enzyme dosage 9 U-g-1. pH 8.0, the pulp concentration of 7.0%, the reaction time of 60 min. The pulp properties under these optimum conditions were as followed ： α-cellulose content of 90.06%, the degree of polymerization of 732, pentosan content of 7.01%, 85.45% ISO of whiteness, the ash content of 0.31%, the yield of 88.61%,6. In order to meet the standard required for dissolving pulp viscose fiber requirements, alkali treatment was used to treat the bleached kraft hardwood pulp under optimum conditions ofxylanase pretreatment. With the increasing of alkali amount, α-cellulose content increased as well as the pentosan content, polymerization degree and ash content decreased, the pulp was able to meet the requirements of the staple dissolving pulp after xylanase treatment and alkali treatment processing.

关 键 词：漂白阔叶木硫酸盐浆 木聚糖酶 NaOH处理 纸浆性能 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]