Study on biochemical degumming process of mulberry fiber,part 1:single factor analysis

ABSTRACT

Mulberry fiber is a new natural fiber. More and more attentions are paid to mulberry because of its good properties. The traditional chemical degumming method is liable to cause environmental pollution. This subject adopts the method of biochemical degumming technology to obtain mulberry fibers with certain spinnable properties. The degumming process of mulberry bark is studied on the basis of knowing the chemical composition and percentage content of the material composition of the raw material of mulberry bark, and the influence of different process conditions and parameters on the degumming effect is analyzed. Through single factor experiment and analysis of results, the optimized process parameters of biochemical combined degumming are as follows: the temperature and concentration of pickling acid pretreatment are 60°C and 2.5 g/L, respectively. The concentration, duration of action, and bath ratio of alkaline pectinase are 47 g/L, 8 h, and 1:20, respectively. The concentration and action time of sodium hydroxide in alkali boiling are: 10 g/L, 3 h. The concentration, duration of action, and bath ratio of xylanase are 10 g/L, 4 h, 1:20, respectively. The optimization process parameters obtained above lay the foundation for further orthogonal experiments to obtain the optimal degumming process.

摘要

桑皮纤维是一种新型天然纤维. 桑树因其优良的特性越来越受到人们的重视. 传统的化学脱胶方法易造成环境污染. 本课题采用生化脱胶技术，获得具有一定可纺性的桑皮纤维. 在了解桑皮原料的化学成分和物质成分百分含量的基础上，对桑皮脱胶工艺进行了研究，分析了不同工艺条件和参数对脱胶效果的影响. 通过单因素试验和结果分析，确定了生物化学复合脱胶的最佳工艺参数为：浸酸预处理温度为60℃，浓度为2.5g/L。碱性果胶酶的浓度为47g/L，作用时间为8h，浴比为1:20. 碱煮过程中氢氧化钠的浓度和作用时间为10g/L，3h，木聚糖酶的浓度、作用时间和浴比分别为10 g/L、4 h、1:20. 优化后的工艺参数为进一步的正交实验获得最佳脱胶工艺奠定了基础.

KEYWORDS:

• Mulberry fiber
• single factor
• biochemical degumming method
• alkaline pectinase
• xylanase
• residual gum rate

关键词:

• 桑皮纤维
• 单一因素
• 生化脱胶法
• 碱性果胶酶
• 木聚糖酶
• 残胶率

Additional information

Funding

This work was supported by the Jiangsu Province Industry-University-Research Cooperation Project [BY2018267];China Textile Industry Federation Science and Technology Guiding Program [2018046].