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Production method of water soluble sericin

A technology of sericin and a manufacturing method, applied in the field of water-soluble sericin, can solve the problems of low recovery efficiency, high recovery cost, complicated preparation process, etc., and achieve the effects of improving efficiency, reducing production cost and high-efficiency recovery

Inactive Publication Date: 2004-02-25
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of water-soluble sericin protein, especially sericin with a small molecular weight (generally below 5 kilodaltons), is mainly obtained by enzymatic or acid hydrolysis, which is difficult to control the degradation of sericin To a certain extent, it is impossible to obtain water-soluble sericin with various uses and different molecular weight ranges
Therefore, most of the above methods have complicated preparation process, high recovery cost, and low recovery efficiency, and are not suitable for the recovery of industrial sericin or the preparation of water-soluble sericin protein.

Method used

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  • Production method of water soluble sericin
  • Production method of water soluble sericin

Examples

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Embodiment 1

[0021] Weigh raw materials such as cocoon shells, cocoon clothes, waste silk, etc., first rinse in warm water or in weakly alkaline aqueous solution to remove impurities and dust, then add 20 times the amount (V / W) of pure water or use NaOH to adjust the pH to 7~ 8 Immerse in an aqueous solution to make the cocoon or cocoon shell fully swell, then place it in a high-temperature and high-pressure container, and treat it at a temperature of 120°C (0.1MPa pressure) for 1 hour, take out the degummed silk after cooling, and rinse it repeatedly with water. The washing liquid and the degumming liquid are combined to obtain an insoluble sericin solution.

[0022] Adjust the above-mentioned insoluble sericin solution with NaOH, and the pH values ​​are pH=10.0, pH=11.0 and pH=12.0 respectively; or directly spray and dry the above-mentioned degummed sericin solution to make insoluble sericin powder, and make the sericin The powder was first dissolved in hot water, and then adjusted to pH...

Embodiment 2

[0027] Weigh 1Kg of raw materials such as cocoon shells, cocoon clothing, waste silk, etc., first rinse in warm water or in weakly alkaline aqueous solution to remove impurities and dust, and then add 20 times the amount (V / W) of pure water for immersion to make the cocoon clothing Or after the cocoon shell is fully swollen, put it in a high-temperature and high-pressure container, and treat it at a temperature of 120°C (0.1MPa pressure) for 1 hour. After cooling, take out the degummed silk, rinse it repeatedly with water, and combine the washing liquid with the degumming liquid. An insoluble sericin solution was prepared.

[0028] Adjust the obtained insoluble sericin solution to pH 11.0 with NaOH; or directly spray dry the obtained insoluble sericin solution to make insoluble sericin powder, and dissolve the sericin powder with hot water first, Also adjusted to pH 11.0 with NaOH. Next, the insoluble sericin solution after adjusting the pH value above was divided into two gr...

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Abstract

The method for preparing water soluble sericin with different molecular weights by using cocoon as raw material includes the following steps: soaking cleaned cocoon crust and waste silk in water or alkalescency solution, regulating pH value of said solution to 8-12 and making high-temp. high-pressure degrading treatment, regulating temp. or pressure, treatment time and pH value of boiling solution and controlling requirement molecular weight of water soluble sericin so as to prepare water soluble sericin solution or powder. The product can be extensively used in the fields of biological material, textile finishing agent.

Description

technical field [0001] The invention relates to a method for producing various water-soluble sericin proteins with different molecular weight ranges by using silkworm cocoons (including cocoon shells, cocoon clothing, waste silk, etc.) as raw materials. Background technique [0002] The main components of silk are sericin and silk fibroin, which are a kind of natural polymer protein produced by silkworms. Sericin accounts for about 20-30% of the total silk protein. When silkworms spin cocoons, sericin is coated on the outside of the silk fiber to protect and glue the silk fiber. Different degrees of degumming are required in the processing and production of silk reeling and silk dyeing. In the processing of silk cotton and silk spinning or in the research and development of silk fibroin new functional materials, sericin must be completely or partially removed before subsequent processing and treatment. At present, in the above-mentioned silk productio...

Claims

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Application Information

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IPC IPC(8): C08H1/00
Inventor 张雨青沈卫德陶美林周文林马燕丁悦
Owner SUZHOU UNIV
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