Method for improving dyeing performance of wool fiber product through enzymatic modification

Abstract

The invention discloses a method for improving the dyeing performance of a wool fiber product through enzymatic modification, and belongs to the technical field of textile biology. Wool pretreatment is performed through hydrogen peroxide; protein kinase A is combined for catalyzing serine and threonine residues phosphorylation in the wool, so that more electronegative groups are generated on the fiber surface; the dyeing of cationic dye on the wool fiber is realized; the dyeing performance of the wool fiber product is improved. The method comprises the following concrete steps of (1) wool hydrogen peroxide pretreatment; (2) wool phosphorylation catalyzed by protein kinase A; (3) cationic dye dyeing; (4) water washing and drying aftertreatment. Compared with a method that the electronegative groups are introduced onto the wool through a chemical method, and realizing the cationic dye wool dyeing, the method disclosed by the invention has the advantages that the enzymic catalytic reaction efficiency is high; the wool phosphorylation reaction conditions are mild; the dyeing performance of the wool fiber product is obviously improved.

Description

technical field [0001] The invention relates to a method for improving the dyeing performance of wool fiber products through enzymatic modification, which is characterized in that the wool fiber is pretreated with hydrogen peroxide, and protein kinase A is used to catalyze the hydroxyl phosphorylation of serine and threonine residues in the fiber. The invention relates to increasing the color yield of cationic dyes on wool and improving the dyeing performance of wool fiber products, belonging to the field of textile biotechnology. Background technique [0002] Wool fiber includes scale layer, cortex layer and medulla layer. The macromolecular structure of wool fiber is composed of 18 kinds of amino acids, and the polar amino acid residues include acidic amino acids, basic amino acids and amino acids containing hydroxyl groups. Under acidic conditions where the pH is lower than the isoelectric point of the fiber, the surface of the wool fiber is positively charged; under nea...

AI Technical Summary

Problems solved by technology

Compared with acid dyes, the dyeing depth and fastness of the two have increased, but the dyed color is not bright enough, and the metal salts in the acid mordant dyeing are easy to remain in the fiber products, which not only affects the safety of textiles, but also easily produces environmental pollution. Pollution, increasing the burden of printing and dyeing wastewater treatment

In addition, reactive dyes for wool can improve the wet fastness of dyeing by forming covalent bonds with wool fibers, but there are also low dye utilization rates and certain color fastnesses (such as sweat light fastness, wet rubbing fastness) in dyeing. Defects that cannot meet the requirements