Method for dissolving fiber of natural silk

A technology of natural silk and fiber, applied in the field of natural organic polymers, can solve the problems of serious degradation and complicated process, and achieve the effects of easy regeneration and processing, good processing performance, and simple and efficient dissolution process.

Inactive Publication Date: 2017-04-26
宁波芸生纺织品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from the results of existing technologies, the current silk dissolvi

Method used

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  • Method for dissolving fiber of natural silk
  • Method for dissolving fiber of natural silk
  • Method for dissolving fiber of natural silk

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The natural mulberry silk was boiled with 0.5wt% sodium bicarbonate solution for 60 minutes, washed with deionized water and dried to obtain degummed mulberry silk. At 20°C, the degummed mulberry silk was placed in 50wt% trifluoroacetic acid aqueous solution, the silk mass fraction was 10%, and the regenerated silk fibroin protein solution was obtained after magnetic stirring for 10 min. figure 1 It is a scanning electron microscope image of the regenerated silk fibroin solution; it can be seen that the silk fibroin in the solution is fibrous, with a fiber length of 5-15 µm and a diameter of 0.5-3 µm. Under this dissolution condition, the dissolution effect is good, showing that the silk protein in the solution is mainly in the shape of nanofibers, and the fiber size is relatively uniform.

[0029] The regenerated silk fibroin protein solution was injected into a polyethylene dish, and the regenerated mulberry silk fibroin protein film was obtained after natural drying....

Embodiment 2

[0031] The natural mulberry silk was boiled with 0.05wt% sodium bicarbonate solution for 30 minutes, repeated three times, then fully washed with deionized water and dried to obtain degummed mulberry silk. Under the condition of 15°C, the degummed mulberry silk was placed in pure trifluoroacetic acid solvent, the silk mass fraction was 10%, and the regenerated silk fibroin protein solution was obtained after magnetic stirring for 20 min. Silk fibroin in the solution is fibrous, with a fiber length of 0.5-5µm and a diameter of 0.1-0.5µm, such as image 3 shown. Under this dissolution condition, silk is dissolved into a smaller-sized fibrous structure with uniform fiber size.

Embodiment 3

[0033] The natural tussah silk was boiled with 0.5wt% sodium carbonate solution for 30 minutes, repeated three times, fully washed with deionized water and dried to obtain degummed tussah silk. Under the condition of 37℃, the degummed tussah silk was placed in trifluoroacetic acid / formic acid (volume ratio 9 / 1), the mass fraction of tussah silk was 8%, and the regenerated tussah silk fibroin protein solution was obtained after magnetic stirring for 10 min. The solution was electrospun to obtain tussah silk fibroin nanofibers, the average fiber diameter was about 560nm, and the protein structure was an amorphous structure, which was transformed into a β-sheet crystal structure after ethanol treatment, such as Figure 4 shown.

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Abstract

The invention discloses a method for dissolving a fiber of natural silk. The method comprises the following steps of obtaining a sericin-removed pure silk fibroin fiber from the silk through a degumming process; afterwards, putting the degummed silk in a solution of which trifluoroacetic acid is used as a solvent main body, and agitating an obtained mixture in a normal-temperature condition to obtain a regenerated silk fibroin solution, wherein the mass percent of silk fibroin in the solution is 0.1 to 50.0 percent. Not only does the method provided by the invention have direct and high-efficiency dissolving capacity and have quite good dissolving effects on mulberry silk, tussur silk, ricinus silk, yamamai silk and the like at the same time, but also a dissolving solution of the silk has wide processibility and can be made into a thin film, a porous material, a nano fiber, a filament and aquogel; therefore, the process is one practical method for Regeneration processing and modifying the silk.

Description

technical field [0001] The invention belongs to the field of natural organic polymers, and in particular relates to a method for dissolving natural silk fibers. Background technique [0002] With the development and progress of society, when fossil resources such as oil, coal and natural gas are becoming increasingly scarce, the development and application of natural renewable resources is extremely important. Silk, as a natural organic polymer material, has been used in the field of textile and clothing by humans for thousands of years. Today, with the rapid development of science and technology, due to its good mechanical properties, biocompatibility and good physical stability, its application range has been expanded to new fields such as food, medicine, regenerative medicine, and beauty, and it has been widely displayed. Wide application prospects and high application value. [0003] In order to realize the application of silk protein in new fields, dissolving and repr...

Claims

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Application Information

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IPC IPC(8): C07K14/435C08J3/11C08L89/00
CPCC07K14/43586C08J3/11C08J2389/00
Inventor 张锋张定
Owner 宁波芸生纺织品科技有限公司
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