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Production of polyvinyl alcohol/sericin blended gel thin film

A technology of polyvinyl alcohol and polyvinyl alcohol solution, which is applied in the field of biomedical composite materials, can solve problems such as insufficient mechanical indicators such as elongation, and achieve simple preparation conditions and processes, good biological performance, and broad application prospects Effect

Inactive Publication Date: 2007-09-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Xie Ruijuan and others mentioned in the article "Preparation and Physical Properties of Sericin Films" (Journal of Donghua University, Vol. 30, No. 6) that epoxy resin was used as a crosslinking agent to prepare sericin films. And tested its physical properties, it was found that the mechanical indicators such as elongation were insufficient
At present, there is no public report on the technology of preparing PVA / sericin blend gel by repeated freezing-thawing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Cut silkworm cocoons into 1cm 2 The small pieces on the left and right are washed repeatedly with deionized water, and then the cocoon pieces are soaked in acetone for a period of time with a Soxhlet extractor, and then the acetone is extracted to remove wax and pigment components. Then put the cocoon pieces in deionized water and boil for about 1 hour, filter out the cocoon pieces, and the obtained solution is sericin solution, and the concentration of sericin solution is calculated by gravimetric method.

[0018] (2) Heat and dissolve PVA124 powder (DP=2400, degree of alcoholysis 98% to 99%) in deionized water in a water bath at about 85°C for 2 hours while stirring continuously to obtain a PVA solution with a concentration of 10wt%. .

[0019] (3) Pour the sericin solution and PVA solution prepared in step (1) and step (2) into a beaker and mix, so that the concentration ratio of sericin and PVA in the mixed solution is 1:2. Stir for a period of time under the ...

Embodiment 2

[0023] (1) Cut silkworm cocoons into 1cm 2 The small pieces on the left and right are washed repeatedly with deionized water, and then the cocoon pieces are soaked in acetone for a period of time with a Soxhlet extractor, and then the acetone is extracted to remove wax and pigment components. Then put the cocoon pieces in deionized water and boil for about 1 hour, filter out the cocoon pieces, and the obtained solution is sericin solution, and the concentration of sericin solution is calculated by gravimetric method.

[0024] (2) Heat and dissolve PVA124 powder (DP=2400, degree of alcoholysis 98% to 99%) in deionized water in a water bath at about 85°C for 2 hours while stirring continuously to obtain a PVA solution with a concentration of 10wt%. .

[0025] (3) Pour the sericin solution and PVA solution prepared in step (1) and step (2) into a beaker and mix, so that the concentration ratio of sericin and PVA in the mixed solution is 1:1. Stir for a period of time under the ...

Embodiment 3

[0029] (1) Cut silkworm cocoons into 1cm 2 The small pieces on the left and right are washed repeatedly with deionized water, and then the cocoon pieces are soaked in acetone for a period of time with a Soxhlet extractor, and then the acetone is extracted to remove wax and pigment components. Then put the cocoon slices in deionized water and boil for about 1.5 hours, filter the cocoon slices, the obtained solution is sericin solution, and calculate the concentration of sericin solution by gravimetric method.

[0030] (2) Heat and dissolve PVA124 powder (DP=2400, degree of alcoholysis 98% to 99%) in deionized water in a water bath at about 85°C for 2.5 hours while stirring continuously to obtain PVA with a concentration of 10wt%. solution.

[0031] (3) Pour the sericin solution and PVA solution prepared in step (1) and step (2) into a beaker and mix, so that the concentration ratio of sericin and PVA in the mixed solution is 3:2. Stir for a period of time under the heating cond...

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Abstract

A gel film of polyvinyl alcohol and sericin mixture with uniform microstructure, high mechanical performance and high bioactivity is prepared through respectively preparing polyvinyl alcohol solution and sericin solution, proportional mixing, stirring, pouring in a container with flat bottom, sealing, and freezing-thawing several times.

Description

technical field [0001] The invention relates to a preparation method of a polyvinyl alcohol / sericin blended gel film. A polyvinyl alcohol / sericin blended gel film with biological activity is prepared by a repeated freezing-thawing method. The gel Films are a well-performing wound dressing. The invention belongs to the field of biomedical composite materials. Background technique [0002] Polyvinyl alcohol (PVA) hydrogel is a water-swellable body of network structure formed by hydrophilic PVA polymers after cross-linking. The PVA hydrogel formed by a certain process is characterized by its high elasticity, chemical stability, It is easy to form, has no toxic and side effects on organisms, and has good compatibility with human tissues, and has obtained many uses in the field of biomedicine. PVA hydrogel material is closer to living tissue in terms of physical properties than other synthetic materials, it has good permeability to water molecules, and its good flexibility and ...

Claims

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Application Information

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IPC IPC(8): A61L15/22A61L15/24A61L15/32C08J5/18C08L29/04C08K5/16
Inventor 孙康江学良许俊
Owner SHANGHAI JIAO TONG UNIV
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