Cationization composite modification method of pure cotton fabric

Abstract

The invention discloses a cationization composite modification method of a pure cotton fabric and belongs to the field of textile printing and dyeing preprocessing. The cationization composite modification method of the pure cotton fabric is characterized in that first chitosan modification processing is performed to the pure cotton fabric, and then quaternary ammonium salt modification processing is performed to the pure cotton fabric; or first the quaternary ammonium salt modification processing is performed to the pure cotton fabric, and then the chitosan modification processing is performed to the pure cotton fabric. By adopting composite cationization modifier processing to the cotton fabric, the cotton fabric can achieve dyeing effects better than a traditional dyeing process without using dyeing accelerating salt or under conditions of salt dyeing acceleration with low concentration, salt content of dyeing waste water is reduced, and the cationization composite modification method is a cotton fabric processing process which is good for the environment.

Description

Technical field: [0001] The invention relates to a cationic composite modification method for pure cotton fabric, which belongs to the field of pretreatment of textile printing and dyeing. Background technique: [0002] During the dyeing process of pure cotton fabric with reactive dyes, the dyes mainly rely on the affinity of the fibers to adsorb to the surface of the fibers, and then diffuse to the inside of the fibers until most of the dyes in the dye bath are transferred to the fibers. However, due to the existence of anionic groups in the molecular structure of reactive dyes, they are electronegative after being dissolved in water, and have a repulsive effect with cotton fibers that are also electronegative in water, so that the exhaustion rate and color fixation rate of reactive dyes are generally biased. Low. [0003] At present, the main way to solve the above problems is to add salt (or sodium salt) in the dyeing bath to solve it. Since the extra sodium ions are a...

AI Technical Summary

Problems solved by technology

Such as adopting quaternary ammonium salt compounds containing chlorohydrin groups or quaternary ammonium salt compounds containing s-triazine groups to carry out cationic modification treatment on cotton fibers, however, although the above-mentioned prior art has realized the salt-free or low Salt dyeing, but low reactive dye uptake (K / S value)