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Keratin solid and preparation method thereof

A protein and protein solution technology, applied in the direction of peptide sources, animal/human peptides, etc., can solve the problems of complex processing process and high cost, and achieve the effect of low cost, simple and practical method, and good development and utilization prospects

Inactive Publication Date: 2012-11-14
SHANGHAI QUANYU BIO TECH SUIPING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To dissolve hair keratin, it is necessary to first destroy the disulfide bonds and hydrogen bonds between keratin molecules. Generally, strong alkali dissolution, oxidation dissolution, reduction dissolution, etc. can be used. The treatment process is complicated and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The keratin protein of the present embodiment is 1000kg of wet pig hair after removing impurities, cleaning and dehydrating as an example.

[0023] The keratin extraction method is as follows:

[0024] 1) Alkali preparation: Add 4000 liters of water (6.15 times the dry weight of pig hair) to a 10,000-liter lye preparation tank, then add 120kg of sodium hydroxide to make about 2.9% lye, and heat up to 95°C;

[0025] 2) Hair dissolving: Add 1000kg of impurity-removed and cleaned wet pig hair to the hair dissolving tank, and then add all the above-mentioned sodium hydroxide solution. After the lye is added, the temperature is kept at about 80°C. After 10 minutes, the hair begins to dissolve, and the stirring is started. Stir the device, dissolve for 30 minutes, take a sample and observe until the pig hair is basically completely dissolved (more than 90% dissolved);

[0026] 3) Neutralization: Use dilute hydrochloric acid with a concentration of 20%, slowly add it to the a...

Embodiment 2

[0032] The keratin solid of the present embodiment is prepared by the following method:

[0033] Take 1000kg wet human hair after impurity removal, cleaning and dehydration as an example, the average moisture content is about 31-32%, and the pure human hair content is about 67%, which is 670kg.

[0034] The keratin extraction method is as follows:

[0035] 1) Alkali preparation: add 4000 liters of water (5.97 times the dry weight of human hair) to a 10000-liter lye preparation tank, then add 120kg of sodium hydroxide to make about 2.9% lye, and heat up to 90°C;

[0036] 2) Hair dissolving: add 1000kg of impurity-removed and cleaned wet human hair into the hair dissolving tank, and then add all the above-mentioned sodium hydroxide solution. After the lye is added, the temperature is kept at about 78°C. After 10 minutes, the hair begins to dissolve, and the stirring is started. Stir the device, and start sampling and observation after 30 minutes of dissolution until the human h...

Embodiment 3

[0039] The keratin solid of the present embodiment is prepared by the following method:

[0040] Taking 1250kg of wet poultry feathers after cleaning, cleaning and dehydration as an example, the average moisture content is about 42-45%, and the pure feather content is about 52%, which is 650kg.

[0041] The keratin extraction method is as follows:

[0042] 1) Preparation of lye: Add 3600 liters of water (5.54 times the dry weight of feathers) to a 10,000-liter lye preparation tank, then add 120kg of sodium hydroxide to prepare 3.3% lye, and heat up to 98°C;

[0043] 2) Hair dissolving: Add 1250kg of impurity-removed and cleaned wet feathers into the hair dissolving tank, and then add all the above-mentioned sodium hydroxide solution. After the lye is added, the temperature is kept at 78°C. After 10 minutes, the hair begins to dissolve, and the stirring device is turned on. Stir and dissolve for 30 minutes and start sampling observation until the feathers are basically complet...

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Abstract

The invention relates to keratin solid and a preparation method thereof. The preparation method of the keratin solid comprises first washing hair and removing impurities; placing the purified hair in alkaline liquid to dissolve to obtain hair protein solution; slowly adding diluted hydrochloric acid with the concentration of 15-20% into the well dissolved hair protein solution with stirring, and performing neutralization to enable the pH to be 8 to 10; removing solid impurities which are over 5 mu m by centrifugal separation, obtaining the pure hair protein solution, and cooling; slowing adding diluted hydrochloric acid with the concentration of 7-10% with stirring after filtrate is cooled to be below 35 DEG C, adjusting the pH to be 4.0 to 4.5, and enabling the hair protein to be full precipitated until light yellow clear liquid occurs on the upper portion of the solution; and separating the protein, and obtaining the hair keratin solid. The preparation method of the keratin solid is simple and practical, the low-cost method for preparing the keratin solid by alkali dissolving and acid deposition separation is adopted, the prepared keratin solid can be directly used for spinning keratin composite fiber without drying, or keratin solid powder is obtained by drying and smashing to be used for other industrial purposes.

Description

Technical field [0001] The invention relates to a keratin protein solid and a preparation method of the keratin protein solid, which belongs to a regenerative protein utilization technology in the field of comprehensive utilization of low-grade hair raw materials. Background technique [0002] Because the molecular structure of keratin in hair is very tight, and the protein molecular segments are laterally cross-linked through chemical bonds such as disulfide bonds, giving it a network space structure, it cannot be dissolved in ordinary solvents and is not easy to dissolve or melt. . To dissolve hair keratin, you must first destroy the disulfide bonds, hydrogen bonds, etc. between keratin molecules. Generally, strong alkali dissolution, oxidation dissolution, reduction dissolution, etc. can be used. The treatment process is complicated and the cost is high. Contents of the invention [0003] The object of the present invention is to provide a keratin solid extracted from ...

Claims

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Application Information

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IPC IPC(8): C07K14/47C07K1/30
Inventor 刘三民陈福库祖志东
Owner SHANGHAI QUANYU BIO TECH SUIPING
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