聚木糖酶在溶解浆制备中的应用研究

本文通过对毛竹预水解浆与非预水解浆的对比研究发现：预水解处理后浆料的灰分含量、铁离子含量高，锰酸钾值高，白度较低，不利于后续蒸煮和漂白。非预水解浆性能优于预水解浆，但聚戊糖含量偏高。实验在此前提下探索非预水解浆生物处理降低聚戊糖的可行性及其浆料性质，结果表明：细菌性聚木糖酶和真菌性木聚糖酶能降低聚戊糖含量18．8％左右，二者差异不显著（P〉0．05），但EDTA和Tween80的加入可以进一步降低聚木糖酶处理后浆料中聚戊糖含量、铁离子含量和灰分含量，同时可以提高溶解浆白度。

The Application of Xylanase in Dissolving Pulp Preparation

The studies on the pulp from two stage oxygen alkali process with and without prehydrolysis showed that the pulp with prehydrolysis had higher ash content,iron ion content and permanganate number and lower brightness.The properties of pulp without prehydrolysis were superior to that with prehydrolysis,but the former had relatively high pantosan content.Therefore,the feasibility of bio-reduction for pantosan as well as the properties of the pulp without prehydrolysis were investigated in this paper.The results showed that the pantosan content in the pulp could be reduced by 18.8% after treating with the bacteroidal and fungal xylanase.There was no significant difference between the two kinds of xylanase(P>0.05).But there existed interaction effect between xylanases.EDTA and Tween 80 could decrease the pantosan,iron ion and ash content and increase the brightness of dissolving pulp.