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Method for separating and extracting fibrillar structure body in natural keratin fiber with reducing solvent

A technology of keratin fibers and structures, applied in the field of natural fiber processing, can solve problems such as refractory degradation and environmental pollution, and achieve the effect of good biocompatibility

Inactive Publication Date: 2009-08-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the stable structure of natural protein fibers, it is difficult to degrade under natural conditions, so their arbitrary discarding will cause great environmental pollution

Method used

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  • Method for separating and extracting fibrillar structure body in natural keratin fiber with reducing solvent
  • Method for separating and extracting fibrillar structure body in natural keratin fiber with reducing solvent
  • Method for separating and extracting fibrillar structure body in natural keratin fiber with reducing solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 5g of wool after loosening and cleaning are washed with acetone, dried and cut into 5mm pieces, which are immersed in 250ml of a solution (pH=6.5) containing sodium metabisulfite and urea, wherein the solution is prepared by adding sodium metabisulfite Add it to 8M urea aqueous solution, the mass concentration of sodium metabisulfite is 7%, stir the mixture at 80°C for 5h, and the stirrer rotates at a speed of 300r / min.

[0028] The mixture obtained after stirring is filtered with an 80-mesh screen to remove unreacted natural keratin fibers, and the filtrate is filtered with a 450-mesh screen to obtain a fibril structure with a diameter of 2-4 μm (80-120 μm in length). Centrifuge at 18°C ​​at 7000rpm for 0.2h to obtain a fibril-like structure with a diameter of 0.2-0.4 μm (20-50 μm in length) and the centrifuged supernatant, wash the obtained fibril-like structure with distilled water, Centrifuge at 7000rpm for 0.2h and then air-dry naturally; dialyze and concentrate th...

Embodiment 2

[0031] Wash 6.25g of yak hair after loosening and removing impurities with absolute ethanol, cut it into 5mm segments after drying, and immerse it in 250ml of a solution (pH=7.2) containing potassium bisulfite and thiourea, wherein the The above solution is obtained by adding potassium bisulfite to 6M thiourea aqueous solution, the mass concentration of potassium bisulfite is 12%, stirring at 60° C. for 8 h, and the speed of the stirrer is 400 r / min.

[0032] The mixture obtained after stirring is filtered with a 120-mesh screen to remove unreacted natural keratin fibers, and the filtrate is filtered with a 350-mesh screen to obtain a fibril structure with a diameter of 2-4 μm (80-120 μm in length). Centrifuge at 22°C at a speed of 3000rpm for 1h to obtain a fibrillar structure with a diameter of 0.2-0.4μm (20-50μm in length) and the centrifuged supernatant, wash the obtained fibril-like structure with distilled water, and store Centrifuge at 3000rpm for 1 hour and then air-dr...

Embodiment 3

[0035] 5g of the discarded horse hair after loosening and removing impurities was cleaned with ether, dried and cut into 5mm segments, which were immersed in 250ml of a solution (pH=6.8) containing sodium sulfite and lithium bromide, wherein the solution was obtained by adding sodium sulfite Add it to 10M lithium bromide aqueous solution, the mass concentration of sodium sulfite is 10%, stir at 70°C for 6h, and the speed of the stirrer is 500r / min.

[0036] The mixture obtained after stirring is filtered with a 100-mesh screen to remove unreacted natural keratin fibers, and the filtrate is filtered with a 400-mesh screen to obtain a fibril structure with a diameter of 2-4 μm (80-120 μm in length). Centrifuge at 15°C at a speed of 5000rpm for 0.4h to obtain a fibrillar structure with a diameter of 0.2-0.4 μm (20-50 μm in length) and a centrifuged supernatant, wash the obtained fibril-like structure with distilled water, and Centrifuge at 5000rpm for 0.4h and then air-dry natura...

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Abstract

The invention provides a method for taking reducing solvent to separate and extract fibrillar structural body and keratin solution in natural keratin fiber, and is characterized by comprising the concrete steps: the natural keratin fiber is sequentially processed by opening and scotching, decontaminating, washing and drying, cut into fiber sections having the length of 3-6mm, dipped into protein denaturation solution which contains the reducing solvent and can break hydrogen bond of protein and then stirred at the temperature of 50-90 DEG C; after the mixture is filtered by a screen mesh, the fibrillar structural body with the diameter of 2-4mum and filtrate can be obtained; the filtrate is separated to obtain the fibrillar structural body with the diameter of 0.2-0.4mum and centrifugal supernatant fluid, and then the obtained fibrillar structural body is washed and dried; after the centrifugal supernatant fluid is dialyzed and concentrated, the keratin aqueous solution can be prepared. The invention can be used for preparing anisotropic fibrillar structural body and keratin solution, and has the advantages of simple method, high productive rate, low energy consumption and seldom environmental pollution.

Description

technical field [0001] The invention relates to a method for separating and extracting fibrillar structures and keratin solution in natural keratin fibers with a reducing solvent, and belongs to the technical field of natural fiber processing. Background technique [0002] Wool is a precious natural fiber material, but due to the differences in the quality of natural fibers, the textile processing industry produces a large amount of non-spinnable waste wool every year in the opening and carding processes. Due to the stable structure of natural protein fibers, it is difficult to degrade under natural conditions, so their arbitrary discarding will cause great environmental pollution. Wool is a natural keratin material with a protein content of more than 90%. It is a good renewable material. If it is recycled, it will not only help environmental protection, but also develop high value-added products, which has wide application prospects. . [0003] At present, there are repor...

Claims

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Application Information

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IPC IPC(8): C08L89/04C08H1/06
Inventor 于伟东范杰刘洋
Owner DONGHUA UNIV
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