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Antibacterial fibroin protein fiber and preparation method thereof

A protein fiber and antibacterial silk technology, applied in fiber treatment, animal fiber, biochemical fiber treatment, etc., can solve the problems of poor bonding fastness, low adhesion, and limited application and promotion, and achieve permanent antibacterial properties and low biological toxicity. Effect

Active Publication Date: 2017-06-13
杭州季盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common problem of these two methods is that nano-silver only adheres to the surface of silk material, its adhesion is low, and the bonding fastness is poor. The bigger problem is that there is a biological risk when organisms are exposed to nano-silver (direct contact with nano-silver) , its toxicity has been widely concerned, and the existence of these problems makes the current nano-silver technology unable to meet the requirements of practical applications, so further application and promotion are greatly limited

Method used

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  • Antibacterial fibroin protein fiber and preparation method thereof
  • Antibacterial fibroin protein fiber and preparation method thereof
  • Antibacterial fibroin protein fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare an aqueous solution of formic acid with a mass fraction of 90%, and then add silver nitrate to the formic acid solution, with a mass fraction of silver nitrate of 0.001%, and dissolve it under magnetic stirring in the dark for 5 minutes; immerse the undegummed natural mulberry silk raw silk in the formic acid solution, and keep it in the dark for 1 hour. 4°C; the obtained raw silk is fully washed with water, and after natural drying, the silk fiber containing nano-silver is obtained; the silver nitrate aqueous solution is used as a control treatment, and the silk fiber containing nano-silver is also obtained;

[0037]Degumming silk fibers containing nano-silver with 0.05% sodium carbonate aqueous solution, the bath ratio of silk and sodium carbonate solution is 1:50, repeat degumming three times, wash with deionized water, and dry naturally to obtain antibacterial silk fibroin fibers; The tensile strength of the raw silk before treatment is 410MPa, and after trea...

Embodiment 2

[0041] Configure an aqueous solution of formic acid with a mass fraction of 98%, and then add silver nitrate to the formic acid solution, with a mass fraction of silver nitrate of 0.01%, and dissolve with magnetic stirring in the dark for 15 minutes; immerse the undegummed natural mulberry cocoon silk in the formic acid solution, and keep it in the dark for 5 hours. 20°C; then fully washed with water, and after natural drying to obtain antibacterial silkworm cocoons; degumming the antibacterial silk with 0.25% sodium bicarbonate aqueous solution, the bath ratio of silk and sodium bicarbonate solution is 1:40, and repeat the degumming three times , washed with deionized water, and dried naturally to obtain antibacterial silk fibroin fibers.

[0042] like image 3 Shown are scanning electron microscope pictures of silver-containing silk before and after degumming. It can be seen from the figure that before degumming, the surface of silk fiber contains many impurities and many na...

Embodiment 3

[0048] Prepare a formic acid ethanol solution with a mass fraction of 85%, then add silver fluoride to the formic acid solution, the silver fluoride mass fraction is 0.1%, and stir for 30 minutes in the dark to dissolve; immerse the undegummed natural tussah silk in the formic acid solution, and keep it in the dark for 2 hours , temperature 14°C; the obtained natural tussah silk was fully washed, and after natural drying, the tussah silk fiber containing nano-silver was obtained; finally, the tussah silk was degummed with 0.5% sodium carbonate aqueous solution, and the bath ratio of silk and sodium carbonate solution was 1 : 50, repeated degumming three times, washed with deionized water, and dried naturally to obtain antibacterial tussah silk fibroin protein fibers; the inhibition rate of E. After sub-standard washing, the antibacterial silk still retains more than 85% of the antibacterial effect, indicating that the antibacterial fastness is high.

[0049] like Figure 4 Sh...

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Abstract

The invention provides antibacterial fibroin protein fiber and a preparation method thereof. The preparation method comprises the following steps: preparing a formic acid solution, adding silver salt into the formic acid solution, and stirring and dissolving; soaking a silk fiber which is not degummed or is partially degummed into the formic acid solution containing the silver salt, and performing lucifugal reaction for a period of time; completely washing the silk fiber product after the reaction, and drying to obtain a silver-containing silk fiber product; and performing degumming treatment on the silver-containing silk fiber product to obtain the antibacterial fibroin protein fiber. The preparation method provided by the invention is simple and easy in batched production; and in the prepared antibacterial fibroin protein fiber, the antibacterial agent nano-silver is mainly distributed in the fiber, so that excellent biocompatibility of the fibroin protein can be maintained, the biological toxicity exposed by the nano-silver is avoided, broad-spectrum antibacterial property is given to the fibroin protein fiber product, the antibacterial property is durable, and the antibacterial fibroin protein fiber is very suitable for people sensitive to the antibacterial agent and can serve as biological products such as antibacterial dressing and antibacterial suture lines.

Description

technical field [0001] The invention relates to an antibacterial silk fibroin fiber and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] At present, domestic and foreign textile antibacterial treatment technologies can be roughly divided into two types: Prepare antibacterial fibers first, and then make various antibacterial fabrics; Fabrics are post-treated with various antimicrobial agents to obtain antimicrobial properties. [0003] In comparison, the fabric obtained by the first method has a long-lasting antibacterial effect and good washability, but it has high technical content, great difficulty, and a wide range of fields. The production process of antibacterial fibers is relatively complicated, and the requirements for antibacterial agents are high. And the processing process of the second method is relatively simple, but there are many three wastes in production, and its washability and antibacteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M13/188D01C3/02D06M101/10
CPCD01C3/02D06M11/83D06M13/188D06M16/00D06M2101/10
Inventor 张锋张定
Owner 杭州季盛新材料有限公司
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