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Fast and controllable silk fibroin short fiber preparation method

A technology of short fiber and cocoon silk, which is applied in the field of preparation of cocoon silk fibroin short fiber, can solve the problems of difficult control of hydrolysis degree, severe reaction conditions, and great harm to human body, and achieves easy batch processing, simple process, and high rate effect

Active Publication Date: 2018-11-30
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, some researchers used some inorganic strong acids to dissolve silk fibroin. The research found that silk fibroin can be completely dissolved, but the reaction conditions are severe, and the degree of hydrolysis is difficult to control, which is extremely harmful to the human body and limits its application.

Method used

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  • Fast and controllable silk fibroin short fiber preparation method
  • Fast and controllable silk fibroin short fiber preparation method
  • Fast and controllable silk fibroin short fiber preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 5g of silkworm cocoons in a mixed solution consisting of 7g of lithium hydroxide, 10g of sodium hydroxide, 70g of urea and 120g of water, and add alcohol solution drop by drop to the mixed solution of silkworm cocoons (ethanol is used for alcohol), Control the dropping rate at 1mL / min to obtain a mixed solution with an alcohol mass concentration of 2%. The obtained mixed solution was incubated at room temperature for 3 to 3.5 hours, and intermittently supplemented with slight stirring and dispersion at room temperature to obtain a length mainly Cocoon silk fibroin short fiber solution with a uniform distribution of 1mm to 3mm; place the prepared cocoon silk fibroin short fiber solution in a dialysis bag for dialysis treatment, and change the ultrapure water every 3 hours. Dialysis for 2 days. Afterwards, the insoluble particles in the cocoon silk fibroin short fiber solution are removed with a suction filter (washed 4 times with deionized water) and qualitative...

Embodiment 2

[0037] Dissolve 10g silkworm cocoons in a mixed solution consisting of 12g lithium hydroxide, 20g sodium hydroxide, 120g urea and 240g water, add alcohol solution dropwise to the mixed solution (propanol is used for alcohol), and control the dropping rate as 1mL / min to obtain a mixed solution with a mass concentration of alcohols of 7%. The obtained mixed solution was incubated at room temperature for 5.5-6.5 hours, and intermittently supplemented with slight stirring and dispersion at room temperature to obtain a length of 700μm-1.2 mm and uniformly distributed cocoon fibroin short fiber solution; the prepared cocoon silk fibroin short fiber solution is placed in a dialysis bag for dialysis treatment, and the ultrapure water is changed every 3 hours, and the ultrapure water is dialyzed for 3 sky. Afterwards, the insoluble particles in the cocoon silk fibroin short fiber solution are removed with a suction filter (washed 5 times with deionized water) and qualitative filter pap...

Embodiment 3

[0039] Dissolve 20g silkworm cocoons in a mixed solution consisting of 32g lithium hydroxide, 40g sodium hydroxide, 320g urea and 480g water, add alcohol solution (isopropanol) drop by drop to the mixed solution, and control the dropping speed 1mL / min to obtain a mixed solution with an alcohol mass concentration of 8%. The obtained mixed solution was incubated at room temperature for 7.5 to 8 hours, supplemented by light stirring and dispersion treatment at room temperature intermittently to obtain a length of mainly 400 μm to 1mm and Uniformly distributed cocoon fibroin short fiber solution; put the prepared cocoon silk fibroin short fiber solution in a dialysis bag for dialysis treatment, change the ultrapure water every 3 hours, and dialyze in the ultrapure water for 3 days. Afterwards, the insoluble particles in the cocoon silk fibroin short fiber solution are removed with a suction filter (washed 5 times with deionized water) and qualitative filter paper. After all the abo...

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Abstract

The invention relates to a fast and controllable silk fibroin short fiber preparation method. According to the method, silkworm cocoons are put into a mixed solution of sodium hydroxide, lithium hydrate and urea; through normal temperature alcohol addition still standing or no-alcohol-addition heating still standing, a silk fibroin short fiber solution with the length being about 1mum to 3mm in uniform distribution is obtained; then, the solution is put into a dialysis bag for dialysis treatment; then, insoluble micro particles in the silk fibroin short fiber solution are removed through filtering; finally, through baking or drying, the silk fibroin short fiber can be obtained. The preparation method has the following advantages that the (1) the process is simple; the cost is low; the batch processing is easy; (2) in the production process, the use of toxic agents causing serious pollution on the environment does not need to be used; the characteristics of safety and environment protection are realized; (3) in the preparation process, the dissolution temperature and the dissolution time can be regulated and controlled; the length of the silk fibroin short fiber is controlled; in addition, the yield of the silk fibroin short fiber is high.

Description

technical field [0001] The invention belongs to the technical field of silk fibroin protein fibers, and in particular relates to a method for preparing fast and controllable cocoon silk fibroin short fibers with a certain length. Background technique [0002] As the birthplace of the world's silkworm cocoon industry, China began to raise silkworms for silk as early as 5,500 years ago. For thousands of years, silkworm cocoon production and processing have interpreted the profound history of agricultural development, and even set up the "Silk Road" for business and cultural exchanges between the East and the West. As the country with the richest silkworm cocoon resources in the world, China has unique resource advantages. Now it is mainly distributed in Liaoning, Jilin, Heilongjiang, Shandong, Inner Mongolia, Henan, Guizhou, Shanxi, Hubei and other provinces. Silkworms are divided into silkworms (also known as silkworms) and wild silkworms. In the past, silkworms used mulber...

Claims

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Application Information

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IPC IPC(8): D01F4/02
CPCD01F4/02
Inventor 林海涛魏子凯赵树强宁晚娥张昊
Owner GUANGXI UNIVERSITY OF TECHNOLOGY