Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An Antibacterial Finishing Method of Silk Based on Enzymatic Conversion and Grafting

An antibacterial finishing, silk technology, applied in the direction of enzyme/microorganism biochemical treatment, biochemical fiber treatment, fiber treatment, etc., can solve the problems such as the discharge of finishing waste liquid to pollute the environment, the weak bonding of silk fibers, and the release and migration to the surface of the body and skin. , to achieve the effect of mild treatment conditions, good antibacterial performance and high antibacterial performance

Active Publication Date: 2021-03-19
JIANGNAN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these finishing agents endow the silk with a certain antibacterial effect, some of them are not firmly bonded to the silk fiber, are easily released from the surface of the fiber and migrate to the surface of the skin, or the strength of the silk is damaged during baking, and the fiber turns yellow. 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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Gram weight is 70g / m after removing sericin with the method mentioned in the present invention 2 Antibacterial finishing of silk fabrics;

[0025] (1) Enzymatic conversion of amino acids in silk: silk is treated with serine hydroxymethyltransferase;

[0026] 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 2 hours; after the treatment, the silk fabric is washed;

[0027] (2) Laccase-TEMPO catalyzed oxidation of silk grafted with polylysine: the silk treated in step (1) was catalyzed and oxidized by a laccase-TEMPO system, and grafted with polylysine; treatment process prescription and conditions: laccase 5U / mL, TEMPO 2g / L, ε-polylysine (molecular weight 3500) 2.5g / L, pH 4.5, temperature 30°C, time 3 hours; after the treatment, the silk was washed and dried.

[0028] Sample 1: without step (1), (2) treatment...

Embodiment 2

[0033] Carry out the antibacterial finishing of the mulberry silk fiber after removing sericin with the method mentioned in the present invention;

[0034] (1) Enzymatic conversion of amino acids in silk: silk is impregnated with serine hydroxymethyltransferase;

[0035] Treatment process prescription and conditions: Serine hydroxymethyltransferase 10U / mL, pyridoxal 5-phosphate 1mmol / L, tetrahydrofolate 10mmol / L, formaldehyde 12.5mmol / L, pH 8.5, temperature 37°C, treatment time 8 hours ;Wash the silk fabric after the treatment;

[0036] (2) Laccase-TEMPO catalyzed oxidation of silk grafted with polylysine: the silk treated in step (1) was catalyzed and oxidized with laccase-TEMPO system, and grafted with polylysine; treatment process prescription and conditions: laccase 50U / mL, TEMPO15g / L, ε-polylysine (molecular weight 4800)9g / L, pH 5.5, temperature 40°C, time 12 hours; after the treatment, the silk was washed and dried.

[0037] Sample 4: without step (1), (2) treatment; ...

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a silk antibacterial finishing method based on enzyme-catalyzed conversion and grafting. Glycine in protein fiber macromolecules is catalyzed by utilizing serine hydroxymethyltransferase to be converted into serine, the number of serine in silk fibers can be increased, then the serine in the silk fibers is catalytically oxidized by utilizing laccase and a 2,2,6,6-tetramethyl pyridine-nitrogen-oxide (TEMPO) system to generate an aldehyde group, the aldehyde group is cross-linked with polylysine to perform the silk antibacterial finishing treatment. The silk antibacterial finishing method comprises the following steps: (1) enzymatically converting amino acid in silk; and (2) catalytically oxidizing silk grafted polylysine by virtue of laccase-TEMPO. Compared with thetraditional chemical cross-linking method antibacterial finishing treatment, the silk treated in the method of the invention has good antibacterial performance, mild enzyme treatment condition, and higher physical and mechanical properties compared with an un-treated sample.

Description

technical field [0001] The invention relates to an antibacterial finishing method of real silk based on enzymatic transformation and grafting, and belongs 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. Silk fiber is a protein-based fiber product. Under appropriate temperature and humidity conditions, it is easy to become a nutrient for bacteria, molds and other microorganisms, which will cause mildew in the fabric and may even become a carrier for disease transmission. Therefore, in order to improve the performance of real silk as a high-grade fiber product, it is necessary to carry out antibacterial finishing processing to real silk fiber or real silk fabric. [0003] At present, the co...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D06M16/00D06M15/59D06M101/10
CPCD06M15/59D06M16/00D06M16/003D06M2101/10
Inventor 王平王琳袁久刚余圆圆邓超
Owner JIANGNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com