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ABSTRACT
The mulberry fiber is extracted from the mulberry bast by biochemical degumming method. Based on the single factor experiment, the orthogonal experiment is further designed. The optimal process parameters for biochemical combined degumming are as follows: pretreatment stage, sulfuric acid solution concentration 2.5g/L, time 1h, temperature 60°C, bath ratio 1:20; alkaline pectinase treatment stage, alkaline pectinase solution concentration 46g/L, time 8h, temperature 50°C, bath ratio 1:20, solution pH = 9; alkali boiling stage, sodium hydroxide solution concentration 10g/L, alkali boiling time 3h, sodium silicate 30g/L, temperature 100°C, bath ratio 1:20; xylanase treatment stage, the concentration of xylanase solution 9g/L, the time 4h, the temperature 50°C, the bath ratio 1:20, and the solution pH = 4.8. By comparing the properties of mulberry fiber obtained by biochemical degumming and chemical degumming, it is found that the biochemical degumming process has less damage to fibers and more effective removal of lignin and hemicellulose.
抽象
摘要桑皮纤维通过生化脱胶法从桑树中萃取. 在单因素实验的基础上，进一步设计了正交实验. 生化联合脱胶的最佳工艺参数如下：预处理阶段，硫酸溶液浓度2.5g/L，时间1小时，温度60°C，浴比1：20;碱性果胶酶处理阶段，碱性果胶酶溶液浓度46g/L，时间8h，温度50°C，浴比1：20，溶液pH=9;碱煮阶段，氢氧化钠溶液浓度10g/L，碱煮时间3h，硅酸钠30g/L，温度100°C，浴比1：20;木聚糖酶处理阶段，木聚糖酶溶液浓度9g/L，时间4h，温度50°C，浴比1：20，溶液pH=4.8. 通过比较通过生化脱胶和化学脱胶获得的桑皮纤维的特性，发现生化脱胶过程对纤维的损害较小，对木质素和半纤维素的去除效果也更为有效.
Acknowledgment
This work was supported by China Textile Industry Federation Science and Technology Guiding Program under Grant No.2018046 and Jiangsu Province Industry-University-Research Cooperation Project under Grant No. BY2018267.