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Method for regenerating wool keratin by L-cysteine

A technology of wool keratin and cysteine, which is applied in the field of wool fiber regeneration and utilization, can solve problems such as waste and environmental impact, and achieve the effects of saving resources, protecting the environment and having high molecular weight.

Inactive Publication Date: 2015-08-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of wool fiber is α-keratin. Keratin molecules form a highly cross-linked three-dimensional stable structure through disulfide bonds, hydrogen bonds, salt bonds and other bonds. Dissolution, the traditional method of dissolving wool protein is to break the disulfide bond or peptide bond of the protein molecule into short peptides by strong alkali, strong acid, reducing agent or oxidizing agent and other reagents. These methods generally have a large amount of inorganic acid, alkali, reducing agent or oxidizing agent The waste of environmentally unfriendly solvents has a serious impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Put the wool fiber in H 2 o 2 Wash in alkaline solution in which 30% H 2 o 2 The concentration of soda ash is 6mL / L, the concentration of soda ash is 10g / L, the temperature is 50°C, and the bath ratio is 40:1. Degrease with ethanol-acetone mixed solvent for 12 hours, dry at 70°C, and then shred the dried wool. Wherein, the degreasing agent used in the degreasing process only needs to immerse the wool fiber, and the volume ratio of ethanol and acetone in the ethanol-acetone mixed solvent is 2:1.

[0032] (2) Add the shredded wool fiber to the L-cysteine-urea composite liquid, wherein the bath ratio is 20:1, the amount of L-cysteine ​​is 20g / L, and the amount of urea is 8mol / L . Adjust the pH value to about 10 with 200g / L NaOH, cover with a stopper, heat up to 75°C, shake mechanically for 5 hours, and obtain a mixed solution of wool and keratin.

[0033] (3) Filtrating the wool and keratin mixed solution with heat, and taking the filtrate to obtain a wool kerati...

Embodiment 2

[0036] (1) Put the wool fiber in H 2 o 2 Wash in alkaline solution in which 30% H 2 o 2 The concentration of soda ash is 6mL / L, the concentration of soda ash is 10g / L, the temperature is 50°C, and the bath ratio is 40:1. Then degrease with ethanol-acetone mixed solvent for 12 hours, and then shred the dried wool. Wherein, the degreasing agent used in the degreasing process only needs to immerse the wool fiber, and the volume ratio of ethanol and acetone in the ethanol-acetone mixed solvent is 2:1.

[0037] (2) Add the shredded wool fiber to the L-cysteine-urea composite liquid, wherein the bath ratio is 20:1, the amount of L-cysteine ​​is 10g / L, and the amount of urea is 8mol / L . Adjust the pH value to about 10 with 200g / L NaOH, cover with a stopper, heat up to 75°C, shake mechanically for 5 hours, and obtain a mixed solution of wool and keratin.

[0038] (3) Filtrating the wool and keratin mixed solution with heat, and taking the filtrate to obtain a wool keratin soluti...

Embodiment 3

[0045] (1) Put the wool fiber in H 2 o 2 Wash in alkaline solution in which 30% H 2 o 2The concentration of soda ash is 6mL / L, the concentration of soda ash is 10g / L, the temperature is 50°C, and the bath ratio is 40:1. Then degrease with ethanol-acetone mixed solvent for 12 hours, and then shred the dried wool. Wherein, the degreasing agent used in the degreasing process only needs to immerse the wool fiber, and the volume ratio of ethanol and acetone in the ethanol-acetone mixed solvent is 2:1.

[0046] (2) Add the shredded wool fiber to the L-cysteine-urea composite liquid, wherein the bath ratio is 20:1, the amount of L-cysteine ​​is 25g / L, and the amount of urea is 6mol / L . Adjust the pH value to about 10 with 200g / L NaOH, cover with a stopper, heat up to 75°C, shake mechanically for 8 hours, and obtain a mixed solution of wool and keratin.

[0047] (3) Filtrating the wool and keratin mixed solution with heat, and taking the filtrate to obtain a wool keratin solutio...

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Abstract

The invention relates to a method for regenerating wool keratin by L-cysteine. The method comprises the following steps: cleaning wool fiber, degreasing by ethanol-acetone mixed solvent, and shearing into pieces; adding the sheared wool fiber into L-cysteine composite fluid and sealing; oscillating at 65-85 DEG C for 3-8 hours, and obtaining wool keratin solution. Subsequently, performing thermal filtering, and taking filter fluid to dialyze; after dialyzing, adjusting pH value to 4.0-4.5, completely separating out keratin, centrifuging, freezing and drying solid component, and obtaining the wool keratin powder. The method for regenerating wool keratin by L-cysteine is simple and practicable; wool keratin powder with high molecular weight and high extraction ratio is prepared by adopting the dissolution of L-cysteine with low cost and precipitation of acetic acid. The prepared keratin powder is stable and can be stored for a long time; the powder can be applied to trauma medicine science; besides, the keratin powder can be dissolved by proper solvent and the keratin powder performs the composite spinning with the other polymers. The method for regenerating wool keratin is applied to the organization engineering, etc.

Description

technical field [0001] The invention belongs to the technical field of regeneration and utilization of wool fibers, in particular to a method for regenerating wool keratin by using L-cysteine. Background technique [0002] Wool keratin fiber is one of the earliest natural fiber materials used by human beings. Due to the limitation of wool quality and textile technology, a large number of short fibers and thick fibers are discarded every year, making the research on the regeneration and utilization of this kind of fibers and methods continue. for people's attention. The main component of wool fiber is α-keratin. Keratin molecules form a highly cross-linked three-dimensional stable structure through disulfide bonds, hydrogen bonds, salt bonds and other bonds. Dissolution, the traditional method of dissolving wool protein is to break the disulfide bond or peptide bond of the protein molecule into short peptides by strong alkali, strong acid, reducing agent or oxidizing agent a...

Claims

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Application Information

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IPC IPC(8): C08L89/04D06M15/15D01F4/00D01F8/02
Inventor 李戎王魁马吉宏菅应凯
Owner DONGHUA UNIV
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