Preparation method of antibacterial and mildew-proof cashmere/cellulosic fiber blended knitted fabric

Abstract

The invention discloses a preparation method of an antibacterial and mildew-proof cashmere / cellulosic fiber blended knitted fabric. The blended knitted fabric is catalyzed through a laccase / TEMPO system to respectively generate aldehyde groups on cellulose fiber glucosyl ring C6 site and serine in cashmere, so as to realize in-situ grafting of nano carboxyl chitosan on the blended knitted fabric, and improve the loading capacity and the binding strength of the natural mildewproof agent on the blended knitted fabric. The method comprises the following steps: (1) catalytic oxidation of the blended knitted fabric by the laccase / TEMPO system; (2) in-situ grafting reaction of nano carboxyl chitosan; (3) finishing by a natural mildew preventive; and (4) post-treatment of the modified blended knitted fabric. Compared with a traditional chemical crosslinking method for antibacterial and mildew-proof finishing of the cashmere blended fabric, the antibacterial and mildew-proof finishing method has the advantages that enzyme catalysis reaction is mild, the grafting efficiency of the nano carboxyl chitosan is high, the technological process is green and environment-friendly, the antibacterial and mildew-proof function of the blended fabric is lasting, the blended fabric is comfortable to wear and high in additional value, and the market prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of fiber material modification, and in particular relates to a method for preparing an antibacterial and mildew-resistant cashmere / cellulose fiber blended knitted fabric. Background technique [0002] With the improvement of people's living standards and the strengthening of health and environmental protection awareness, while emphasizing the beauty and comfort of textile and clothing, higher demands are placed on its green environmental protection and health care functions. As an organic antibacterial agent commonly used in textiles, chitosan is widely used in the field of textiles and clothing due to its wide source, renewable, biocompatible, non-toxic and non-irritating, efficient and durable antibacterial ability, wide antibacterial spectrum, safety and hygiene. , the strong hydrogen bonds between chitosan molecules and molecules make it difficult to dissolve in water, and can only be dissolved in acidic...

AI Technical Summary

Problems solved by technology

As an organic antibacterial agent commonly used in textiles, chitosan is widely used in the field of textiles and clothing due to its wide source, renewable, biocompatible, non-toxic and non-irritating, efficient and durable antibacterial ability, wide antibacterial spectrum, safety and hygiene. , the strong hydrogen bonds between chitosan molecules and molecules make it difficult to dissolve in water, and can only be dissolved in acidic solutions, while acidic solutions are volatile, corrosive, and pollute the environment, which greatly limits the ability of chitosan Therefore, it is necessary to solve the limitation that ordinary chitosan can only have antibacterial properties under acidic conditions, and improve the utilization rate and application range of chitosan;

[0003] Simultaneously, protein fiber and cellulose fiber are the most widely used natural high molecular polymers, have renewability, and are also commonly used raw materials for textiles; lack of effective chemical bonds between chitosan and protein fiber, cellulose fiber, so prior art Periodate oxidation reaction is commonly used to introduce functional groups such as aldehyde group, carboxyl group, ketone group, etc., which can provide conditions for further modification of fibers, but periodate oxidation reaction is easy to cause halogen environmental pollution, high energy consumption, and the strength of fabric fibers is affected. Therefore, a system that can catalyze the oxidation of protein fibers and cellulose fibers is needed, so that the fibers and chitosan can undergo in-situ grafting reactions, and the grafting amount of chitosan on the fibers can be increased and the Binding fastness, increase the load and binding fastness of natural antifungal agents on fiber fabrics, and enhance the antifungal properties of fiber fabrics

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