Protein fiber reactive dye low-salt dyeing modification method

Abstract

The invention discloses a protein fiber reactive dye low-salt dyeing modification method and belongs to the technical field of modification of textile materials. The protein fiber reactive dye low-salt dyeing modification method comprises the following steps: immersing protein fiber into a buffer solution containing chitosan oligosaccharide, reacting at 80 to 90 DEG C for 45 to 60 minutes, takingout the protein fiber, washing the protein fiber with water, drying to obtain aminated protein fiber, and performing reactive dye low-salt dyeing on the aminated protein fiber. The invention providesa method for improving the dyeing property of the protein fiber on the reactive dye under the condition of low-salt concentration by performing cationic modification on the protein fiber by the chitosan oligosaccharide; compared with the unmodified wool, the dyeing percentage of the modified wool on the reactive dye and the K / S value are increased by 32 percent and 135 percent correspondingly. Compared with the traditional method, the method has the advantages that the chitosan oligosaccharide serves as a modifier and the modification condition is mild, non-toxic and easy to control; furthermore, the problems of chemical residues and environmental pollution caused by use of chemical reagents are avoided; and high practicability is achieved.

Description

technical field [0001] The invention relates to a method for low-salt dyeing modification of protein fiber reactive dyes, belonging to the technical field of textile material modification. Background technique [0002] Wool, silk and their fabrics are usually dyed with acid dyes. Although the color is bright, the color fastness is poor, which affects its wearing performance. Theoretically, reactive dyes can chemically react with amino groups and hydroxyl groups on protein fibers to dye them, so they have good soaping fastness. When dyeing with reactive dyes, it is necessary to add a large amount of electrolytes to promote dyeing, which increases the pollution of dyeing wastewater. [0003] At present, low-salt dyeing of reactive dyes is usually achieved by changing the structure of the dye, modifying the fiber, optimizing the dyeing and finishing process conditions, and adding dyeing auxiliaries. Changes in the structure of dyes will increase the price of dyes, and due to ...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the grafted cationic compounds need to add cross-linking agents, resulting in chemical residues, and the residues and emissions of chemical reagents will also cause environmental pollution and other problems.

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