Method for Improving Strength and Dyeing of Wool Fibers

Abstract

The disclosure provides a method for improving the strength and dyeing of wool fibers, and belongs to the technical field of modification of textile materials. By using the feature that protein fiber macromolecules contain a large number of active groups such as hydroxyl groups, amino groups and carboxyl groups, which easily react with polyphenolic pigments formed by a phenolic compound catalyzed by an enzyme to form covalent bonding, the disclosure realizes low temperature dyeing of wool fibers while improving the fiber strength. The disclosure has mild operating conditions easy to control, and in view of increasingly emphasis on environmental protection nowadays, the use of the biological enzyme for dyeing wool fibers is safe, environmentally friendly and efficient, and has a long-term development prospect.

What is claimed is: 
     
         1 . A method for improving the strength of wool fibers, comprising: adding laccase and a phenolic compound to a buffer solution to form a mixed system; and then, putting wool fibers in the obtained mixed system to react at a constant temperature of 30-80° C.; wherein the laccase concentration in the mixed system is 25-125 U/mL; and the concentration of the phenolic compound is 0.04-0.20 mol/L. 
     
     
         2 . The method according to  claim 1 , wherein the phenolic compound is one or more of catechol, hydroquinone, gallic acid, vanillin and guaiacol. 
     
     
         3 . The method according to  claim 1 , wherein the buffer solution is an acetic acid-sodium acetate buffer. 
     
     
         4 . The method according to  claim 3 , wherein the acetic acid-sodium acetate buffer solution has a concentration of 0.1-0.3 mol/L, and a pH of 4.0-6.0. 
     
     
         5 . The method according to  claim 1 , wherein at a bath ratio of 1:20 to 1:50, the wool fibers are added to the mixed system. 
     
     
         6 . The method according to  claim 1 , wherein the reaction is carried out at a constant temperature of 30-80° C. for 2-10 h. 
     
     
         7 . Wool fibers, having the fiber strength improved by the method according to  claim 1 . 
     
     
         8 . Yarn, thread or fabric containing the wool fibers according to  claim 7 .