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Preparation method of sericin / polyvinyl alcohol compound membrane

A technology of sericin and polyvinyl alcohol, which is applied in the field of biomedical composite materials, can solve the problems of insoluble and other problems, and achieve the effects of short production cycle, excellent mechanical properties and mild preparation conditions

Inactive Publication Date: 2016-10-12
JIAXING VOCATIONAL TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the problem of sericin by mixing sericin and polyvinyl alcohol in a certain ratio, drying the mixed solution to obtain a mixed protein film, and then treating the mixed protein film with a certain concentration of ethanol solution to induce its structure to change. Protein and polyvinyl alcohol are easily soluble in water, resulting in a water-insoluble sericin / polyvinyl alcohol mixed film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Heat the purchased ss (sericin) powder and PVA (polyvinyl alcohol) powder in deionized water as a solvent (mass ratio 1:1) in a water bath at about 85°C for 5 hours while stirring continuously , to obtain a sericin / polyvinyl alcohol mixed solution with a concentration of 5%, and let it stand for later use.

[0019] (2) Pour the mixed solution prepared in step (1) into a flat-bottomed container, let it dry naturally, and set aside.

[0020] (3) Treat the SS / PVA film in absolute ethanol for 30 minutes, then in 75% ethanol for 30 minutes, and let it dry naturally. In this way, a sericin / polyvinyl alcohol blend film was produced.

Embodiment 2

[0022] (1) Heat the purchased ss (sericin) powder and PVA (polyvinyl alcohol) powder in deionized water (mass ratio 1:3) in a water bath at about 85°C for 5 hours while stirring continuously , to obtain a sericin / polyvinyl alcohol mixed solution with a concentration of 5%, and let it stand for later use.

[0023] (2) Pour the mixed solution prepared in step (1) into a flat-bottomed container, let it dry naturally, and set aside.

[0024] (3) Treat the SS / PVA film in absolute ethanol for 30 minutes, then in 75% ethanol for 30 minutes, and let it dry naturally. In this way, a sericin / polyvinyl alcohol blend film was produced.

Embodiment 3

[0026] (1) Heat the purchased ss (sericin) powder and PVA (polyvinyl alcohol) powder in a water bath at about 85°C for 5 hours with deionized water as the solvent (mass ratio 3:1), while stirring continuously , to obtain a sericin / polyvinyl alcohol mixed solution with a concentration of 5%, and let it stand for later use.

[0027] (2) Pour the mixed solution prepared in step (1) into a flat-bottomed container, let it dry naturally, and set aside.

[0028] (3) Treat the SS / PVA film in absolute ethanol for 30 minutes, then in 75% ethanol for 30 minutes, and let it dry naturally. In this way, a sericin / polyvinyl alcohol blend film was produced.

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PUM

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Abstract

The invention discloses a preparation method of a sericin / polyvinyl alcohol compound membrane. The preparation method is characterized by comprising the steps: using deionized water as a solvent, dissolving sericin and polyvinyl alcohol in a heating water bath to obtain a mixed solution of a certain concentration; drying the mixed solution to obtain a mixed protein membrane; treating the mixed protein membrane with an ethanol solution of certain concentration to induce change in structure, so as to obtain the sericin protein / polyvinyl alcohol compound membrane, which is non-soluble in water. The invention has mild preparation condition, short production cycle, and green and environment-friendly production process.

Description

technical field [0001] The invention belongs to the field of biomedical composite materials, and relates to a processing method of a sericin film, in particular to a preparation method of a sericin / polyvinyl alcohol mixed film. Background technique [0002] Sericin has good biological properties and can be used in the fields of biology and medicine, such as enzyme immobilization membrane materials, tissue repair membrane materials, etc., and has a very broad application prospect. But under normal preparation conditions, the dried sericin is brittle and hard. It is difficult to form a complete film, and it is easily soluble in water, so it is difficult to have practical value. The film-forming properties can be improved by blending with polyvinyl alcohol, but sericin in the film is obviously soluble in water due to the lack of necessary interaction between the protein macromolecules in the film. [0003] In the Chinese patent application number 200710037786.4, a preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J5/18C08L89/00C08L29/04
CPCC08J5/18C08J7/12C08J2329/04C08J2389/00C08J2429/04C08J2489/00
Inventor 张显华
Owner JIAXING VOCATIONAL TECHN COLLEGE
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