Ecological dyeing antibacterial cotton fabric preparation method

Abstract

The invention discloses an ecological dyeing antibacterial cotton fabric preparation method. An antibacterial cotton fabric is obtained by carrying out a hemiacetal reaction on aldehyde groups at C6 positions in oxidized chitosan molecules and hydroxyl groups in cotton fabric, and then carrying out salt-free dyeing with reactive dyes. The oxidized chitosan modified cotton fabric prepared by the invention has durable and efficient antibacterial activity and good salt-free dyeing performance, has good affinity with human bodies, is green and environmentally friendly, overcomes the problem of environmental pollution caused by using a large amount of inorganic salts and electrolytes in conventional dyeing of cotton fabrics, and has practical application potential.

Description

technical field [0001] The invention relates to a method for preparing an ecologically dyed antibacterial cotton fabric, belonging to the technical field of cellulose fabric dyeing and finishing. Background technique [0002] Cotton fiber is favored by people because of its good human affinity, comfortable wearing, moisture absorption and breathability, wide range of sources, renewable and easy biodegradation. However, cotton fiber has a large specific surface area and strong hygroscopicity, which creates suitable conditions for the reproduction and spread of microorganisms, resulting in damage to fiber mechanics, mold, and odor, and also causes harm to human health. With the increasing awareness of people's hygiene and health, the development of safe, environmentally friendly and durable antibacterial functional textiles has become an urgent problem to be solved. Cotton fibers dyed with reactive dyes have problems of low exhaustion rate and low color fixation rate, so it i...

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have synthesized chitosan polyether compound PEG-CS by modifying chitosan, which has good water solubility, and there are a large number of amino groups on its macromolecular chain. The adsorption capacity of dyes realizes the salt-free dyeing of reactive dyes, but the synthesis of chitosan polyether segments requires 24 hours of reaction at room temperature and 48 hours of dialysis. - The baking process pre-treats cotton fabrics, and high-temperature baking at 110°C has effects on the mechanical properties and handle of cotton fabrics [Sang-Hoon L, Samuel M H. Application of a fiber-reactive chitosan derivativeto cotton fabric as a zero -salt dyeing auxiliary. Coloration Technology,2004, 120: 108-113; Liao Bo, Zhang Bin, Yu Panfen, Du Xiaoming, Yu Xiaohan, Liu Rongzhan. Chitosan polyether derivatives in cotton active salt-free Application in dyeing. Printing and Dyeing, 2017, 6: 6-9]

Invention patent CN106521950A discloses the cotton fabric modified by trimethoxybenzoyl chitosan, which uses organic polycarboxylic acid and amino silicone oil emulsion as crosslinking agent to improve the chemical crosslinking of chitosan and cotton fabric and improve the antibacterial properties of cotton fabric , anti-ultraviolet and dyeing properties, but the finishing liquid has many components and the finishing process is complicated, and the cotton fabric needs to be padded, pre-baked and high-temperature baked, and the process equipment requires high requirements.

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