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A kind of fast and controllable preparation method of cocoon silk fibroin short fiber

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

Active Publication Date: 2020-08-18
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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  • A kind of fast and controllable preparation method of cocoon silk fibroin short fiber
  • A kind of fast and controllable preparation method of cocoon silk fibroin short fiber
  • A kind of fast and controllable preparation method of cocoon silk fibroin short fiber

Examples

Experimental program
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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 rapid and controllable preparation method of cocoon silk fibroin short fibers. Silkworm cocoons are placed in a mixed solution containing sodium hydroxide, lithium hydroxide and urea, and are left standing by adding alcohol at room temperature or heating without adding alcohol. Cocoon silk fibroin short fiber solution with a length of about 1 μm ~ 3mm and uniform distribution, then placed in a dialysis bag for dialysis treatment, and then filtered to remove insoluble particles in the cocoon silk fibroin short fiber solution, and finally dried or After drying, cocoon silk fibroin short fibers can be obtained. The present invention has the following advantages: (1) simple process, low cost, and easy batch processing; (2) no need to use poisonous and environmentally polluting reagents in the production process, and has the characteristics of safety and environmental protection; (3) can During the preparation process, the length of cocoon silk fibroin fibers is controlled by adjusting the dissolution temperature and time, and the production rate of cocoon silk fibroin short fibers 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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Patent Type & Authority Patents(China)
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
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