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Method for extracting keratin

A technology for keratin and hair, which is applied in the field of keratin extraction to achieve the effects of high thermal stability, broad application prospects and low corrosiveness

Pending Publication Date: 2021-06-04
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the current research on keratin extraction mainly focuses on animal hair, and there are few reports on the extraction of keratin from human hair.

Method used

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  • Method for extracting keratin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1-allyl-3-methylimidazolium chloride salt ionic liquid dissolves hair to extract keratin:

[0034](1) To a 100 mL round bottom flask, add 0.4 g shredded and defatted hair and 10 g 1-allyl-3-methylimidazolium chloride successively, stir and dissolve at 120 ℃ for 2 h, and obtain deep Brown ionic liquid hair mixed solution; until no fibrous hair is observed under a polarizing microscope, the ionic liquid dissolves hair in a maximum amount of about 10% of the ionic liquid mass;

[0035] (2) Lower the solution temperature to 25 °C, add 1 mol / L HCl solution to the ionic liquid hair mixed solution system according to the volume ratio of ionic liquid hair mixed solution and hydrochloric acid 1:3, so that the undissolved melanin Precipitate, and then remove the precipitate by filtration to obtain the filtrate, which is distilled under reduced pressure at 75 °C for 4 h to remove excess water to obtain the ionic liquid hair keratin solution;

[0036] (3) Cool the ionic liquid hai...

Embodiment 2

[0040] 1-ethyl-3-methylimidazolium chloride salt ionic liquid dissolves hair to extract keratin:

[0041] (1) Into a 100 mL round bottom flask, add 0.2 g shredded and defatted hair and 10 g 1-ethyl-3-methylimidazolium chloride successively, stir and dissolve at 130 ℃ for 1.5 h, and obtain dark brown The hair ionic liquid mixed solution; until no fibrous hair is observed under the microscope, the maximum amount of the ionic liquid dissolved hair is about 8% of the mass of the ionic liquid;

[0042] (2) Lower the solution temperature to 25 °C, add 0.5 mol / L HCl solution to the ionic liquid hair mixed solution system according to the volume ratio of ionic liquid hair mixed solution and hydrochloric acid solution at a ratio of 1:4, to make the undissolved melanin Precipitate, and then remove the precipitate by filtration to obtain a filtrate, which is distilled under reduced pressure at 65 °C for 5 h to remove excess water, and obtain an ionic liquid hair keratin solution;

[004...

Embodiment 3

[0045] 1-ethyl-3-methylimidazolium acetate ionic liquid dissolves hair to extract keratin:

[0046] (1) Into a 100 mL round bottom flask, add 0.5 g shredded and degreased hair and 10 g 1-ethyl-3-methylimidazole acetate successively, stir and dissolve at 100 ℃ for 2 h, and obtain deep Brown hair ionic liquid mixed solution; until no fibrous hair is observed under a polarizing microscope, the ionic liquid dissolves hair in a maximum amount of about 20% of the mass of the ionic liquid;

[0047] (2) Lower the temperature of the solution to 25 °C, and add 0.2 mol / L HCl solution to the ionic liquid hair mixed solution system according to the volume ratio of ionic liquid hair mixed solution and hydrochloric acid solution at a ratio of 1:6 to make the undissolved melanin Precipitate, and then remove the precipitate by filtration to obtain a filtrate, which is distilled under reduced pressure at 80°C for 5 h to remove excess water to obtain an ionic liquid hair keratin solution;

[00...

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Abstract

The invention provides a method for extracting keratin. The method comprises the following steps: dissolving degreased hair by using imidazole ionic liquid as a solvent, further removing pigment substances in an ionic liquid hair solution, concentrating an ionic liquid hair keratin solution, and precipitating and regenerating keratin in the hair keratin solution by using an ethanol solvent precipitation method. Compared with a traditional solvent for dissolving hair, the method has the following advantages that the process of dissolving hair with the ionic liquid is controllable, the operation is simple, the dissolving efficiency is high, the keratin extraction rate is high, the ionic liquid can be recycled, and efficient dissolving of hair and the high keratin extraction rate are achieved.

Description

technical field [0001] The invention relates to the field of human hair dissolution and resource utilization, in particular to a method for extracting keratin. Background technique [0002] With the development of society, the utilization of renewable resources has become the direction of joint efforts of academia and industry, and the utilization of human hair (hereinafter referred to as hair) has attracted widespread attention of researchers. Hair is a rich keratin resource (the main component of hair is keratin, with a content of 65%-95%), and the growth rate of hair is as high as ~12.7 mm / month, and an adult can produce 80-100 g hair per year. Since 2010, the world's hair production has been increasing at a rate of about 10,000 tons per year. But the effective utilization rate of hair is very low at present, as: a small part is used for wigs, decorative articles and concrete additives, and most hairs are burned or buried, causing serious waste of environmental pollution...

Claims

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Application Information

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IPC IPC(8): C07K14/47C07K1/14C07K1/36C07K1/34C07K1/30
CPCC07K14/4741Y02P20/54
Inventor 聂毅秦从雯高红帅周乐张锁江
Owner 郑州中科新兴产业技术研究院
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