Method for carrying out real silk fabric anti-crease and antibacterial finishing by virtue of laccase-TEMPO process

A silk fabric and antibacterial finishing technology, which is applied in fiber treatment, animal fiber, textiles and papermaking, etc., can solve the problems of finishing waste liquid discharge polluting the environment, silk fibers are not firmly bonded, released and migrated to the surface of the body skin, etc., to achieve improved Combined fastness, ease of enzyme treatment conditions, and high grafting efficiency

Inactive Publication Date: 2016-07-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these finishing agents endow silk fabrics with certain anti-wrinkle and antibacterial effects, some of them are not firmly bonded to the silk fibers, are easily released from the fiber surface and migrate to the body skin surface, or have fiber strength damage during baking, and waste finishing. Disadvantages such as liquid discharge polluting the environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Carrying out grammage with the method mentioned in the present invention is 50g / m 2 Anti-wrinkle and anti-bacterial finishing of silk fabrics;

[0021] (1) Laccase-catalyzed oxidation of tyrosine residues in silk: soak the silk fabric in laccase solution for 1 hour, in which laccase is 7.5U / mL, temperature is 45°C, pH5;

[0022] (2) Chitosan reacts with quinone active groups in real silk: add chitosan (molecular weight: 200,000, degree of deacetylation: 95%) to 4g / L to the system in step (1), and the fabric is at 45°C and pH5 Dipping treatment for 2.5 hours;

[0023] (3) Laccase-TEMPO catalyzed silk-grafted chitosan: TEMPO was added to the system in step (2) to 5 g / L, and the fabric was soaked for 12 hours at 45° C. and pH 5;

[0024] (4) Post-washing treatment: the silk fabric treated in step (3) was washed at 30°C for 0.25 hours, and then the sample was taken out and dried at 45°C.

[0025] Sample 1: untreated silk fabric;

[0026] Sample 2: only process silk fabr...

Embodiment 2

[0030] Carrying out grammage with the method mentioned in the present invention is 46g / m 2 Anti-wrinkle and anti-bacterial finishing of silk fabrics;

[0031] (1) Laccase-catalyzed oxidation of tyrosine residues in silk: immerse the silk fabric in laccase solution for 0.5 hours, in which laccase is 15U / mL, temperature is 50°C, pH5.5;

[0032] (2) Chitosan reacts with quinone active groups in real silk: add chitosan (molecular weight: 200,000, degree of deacetylation: 90%) to 5 g / L in the system of step (1), fabric is at 50 DEG C, pH 5 conditions Dipping treatment for 3 hours;

[0033] (3) Laccase-TEMPO catalyzed silk-grafted chitosan: TEMPO was added to the system in step (2) to 7.5 g / L, and the fabric was dipped for 10 hours at 50° C. and pH 5;

[0034] (4) Post-washing treatment: the silk fabric treated in step (3) was washed at 50°C for 0.5 hour, and then the sample was taken out and dried at 45°C.

[0035] Sample 4: untreated silk fabric;

[0036] Sample 5: only proces...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for carrying out real silk fabric anti-crease and antibacterial finishing by virtue of a laccase-TEMPO process. Quinones active groups are generated through catalyzing tyrosine residual groups in real silks by laccase so that chitosan molecules are grafted on the real silks; then 2,2,6,6-tetramethylpiperidine-nitrogen oxide (TEMPO) is added and is used for catalyzing chitosan and tyrosine in the real silks to generate formyl groups, so that the grafting amount and bonding firmness of the chitosan on the real silks are increased, and the real silk fabric anti-crease and antibacterial finishing is realized. The method comprises the following specific steps of: (1) catalytically oxidizing the tyrosine residual groups in the real silks by the laccase; (2) taking the chitosan and the quinones active groups in the real silks to react; (3) catalyzing the real silks by laccase-TEMPO to graft the chitosan; and (4) washing the real silks with water and then treating. Compared with traditional chemical cross-linking-process vacuum fabric anti-crease and antibacterial finishing, the method has the advantages that the grafting efficiency of the chitosan is high, enzyme treatment conditions are moderate, the real silk fabric anti-crease and antibacterial effect is relatively good and the strength of the fabric is improved.

Description

technical field [0001] The invention relates to a method for anti-wrinkle and antibacterial finishing of silk fabrics by a laccase-TEMPO method, in particular to a method for catalyzing tyrosine residues in real silk to generate quinone active groups by laccase-TEMPO, so as to realize chitosan molecules on silk Grafting, then add 2,2,6,6-tetramethylpiperidine-nitrogen-oxide (TEMPO) to oxidize chitosan and serine in silk to produce aldehyde groups, increase the amount of grafting of chitosan on silk and The invention relates to a method for anti-wrinkle and antibacterial finishing of real silk fabrics in combination with fastness, belonging to the field of textile biotechnology. Background technique [0002] Silk fiber is composed of sericin and silk fibroin. During the degumming process, the sericin component with a spherical protein structure is dissolved by alkaline agent or hydrolyzed by protease, while silk fibroin with high chemical stability is effectively retained. T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M16/00D06M15/03D06M13/352D06M101/10
CPCD06M13/352D06M15/03D06M16/00D06M2101/10
Inventor 王平余圆圆袁久刚王强范雪荣
Owner JIANGNAN UNIV
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