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A method based on enzymatic modification to improve the dyeing performance of silk fibers

A technology for dyeing performance and real silk, which is applied in dyeing, textiles and papermaking. It can solve the problems of inability to meet the processing requirements of high color depth fabrics, limited types and quantities, and low dyeing depth, and achieve mild reaction conditions and high dyeing depth. And color fastness, dyeing performance obvious effect

Active Publication Date: 2021-03-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When silk fabrics are dyed with cationic dyes, due to the limited types and quantities of negatively charged groups in silk fibers, the dyeing depth is not high, which cannot meet the processing requirements of high color depth fabrics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Select real silk electric spinning, carry out enzymatic real silk fiber modification and cationic dye dyeing with the method mentioned in the present invention;

[0027] (1) Enzymatic conversion of amino acids in silk: silk fibers are treated with serine hydroxymethyltransferase;

[0028] Treatment process prescription and conditions: Serine hydroxymethyltransferase 2.5U / mL, pyridoxal 5-phosphate 0.25mmol / L, tetrahydrofolate 2mmol / L, formaldehyde 5mmol / L, pH 7.5, temperature 30°C, treatment time 1 hours; after the treatment, the silk fibers are washed;

[0029] (2) protein kinase A catalyzed phosphorylation: the silk fiber treated in step (1) is catalyzed by protein kinase A for phosphorylation;

[0030] Treatment process prescription and conditions: protein kinase A 2.5U / mL, adenosine triphosphate 10mmol / L, cyclic adenosine monophosphate 1mmol / L, pH 6.5, temperature 25°C, treatment time 4 hours; after the treatment, the silk fibers were washed and dried.

[0031] (3)...

Embodiment 2

[0037] Select real silk knitted silk, carry out the cationic dyeing of real silk fiber with the method mentioned in the present invention;

[0038] (1) Enzymatic conversion of amino acids in silk: silk fibers are treated with serine hydroxymethyltransferase;

[0039] Treatment process prescription and conditions: Serine hydroxymethyltransferase 10U / mL, pyridoxal 5-phosphate 1mmol / L, tetrahydrofolate 8mmol / L, formaldehyde 12.5mmol / L, pH 8, temperature 37°C, treatment time 8 hours ;After the treatment, the silk fiber is washed with water;

[0040] (2) protein kinase A catalyzed phosphorylation: the silk fiber treated in step (1) is catalyzed by protein kinase A for phosphorylation;

[0041] Treatment process prescription and conditions: protein kinase A 10U / mL, adenosine triphosphate 50mmol / L, cyclic adenosine monophosphate 8mmol / L, pH 7.5, temperature 40°C, treatment time 10 hours; after the treatment, the silk fibers were washed and dried.

[0042] (3) Dyeing with cationic d...

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PUM

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Abstract

The invention discloses a method for improving dyeing performance of a real silk fabric based on enzymatic modification; serine hydroxymethyltransferase is used for catalyzing glycine in protein fibermacromolecules to be converted into serine, the number of the serine in real silk fiber is increased, phosphorylation of the serine and threonine residues in the real silk fiber is catalyzed by protein kinase A, the cationic dye binding effect is enhanced, and the dyeing performance of the real silk fabric is improved. The method specifically comprises the following steps: carrying out enzymaticconversion of amino acids in real silk; and (2) catalyzing the phosphorylation by the protein kinase A. Compared with the modification and improvement of the electronegativity of the surface of the real silk fiber by applying a chemical method, the method has the advantages of being high in enzyme catalysis efficiency, mild in reaction conditions and obvious in dyeing performance improvement.

Description

technical field [0001] The invention relates to a method for improving the dyeing performance of silk fibers based on enzymatic modification, and belongs to the field of textile biotechnology. Background technique [0002] Silk fabrics include knitted or woven fabrics processed from mulberry silk and pressed silk. The most commonly used dyes in dyeing are anionic dyes, including acid dyes, acid mordant dyes and acid mordant dyes. Acid dyes have bright colors, complete chromatograms, and good level dyeing, and are widely used in silk fiber dyeing; however, due to the small molecular weight of acid dyes, weak hydrogen bonds and van der Waals forces between dyes and fibers, the wet fastness of dyed goods is low . Compared with acid dyes, acid mordant dyes and acid mordant dyes increase the dyeing depth and color fastness of fiber products, but the color brightness is not enough, and acid mordant dyes need to add metal mordants, which not only affects the safety of textiles , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P5/22D06P1/00D06P3/04
CPCD06P1/00D06P3/04D06P5/22
Inventor 王平李新茹王镱霏魏叶范雪荣
Owner JIANGNAN UNIV
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