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Preparation method of gelatin/poli vinyl alcohol (PVA) composite films improved by inorganic imvite

A technology of inorganic montmorillonite and composite membrane, which is applied in the field of preparation of gelatin/PVA composite membrane, can solve the problems of limited mechanical properties, limited application surface of composite membrane, etc., and achieves increased mechanical properties, good degradability, and good compatibility. Effect

Inactive Publication Date: 2012-07-18
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] Gelatin is a protein composed of various amino acids and derived from animal bodies. It is a natural polymer material. Because of its good biocompatibility, degradability, and film-forming properties, it is often combined with other Or a variety of different synthetic polymer materials to prepare degradable composite materials, among many synthetic polymer materials, polyvinyl alcohol (PVA) is a commonly used polymer material, PVA is a non-toxic, non-toxic An irritating hydrophilic polymer with good bio-affinity, film-forming properties and good mechanical properties. The ordinary gelatin / PVA composite film prepared with these two materials can also be used in a certain ratio. It has the advantages of both materials, but in general its mechanical properties are relatively limited, which limits the application of this composite membrane.

Method used

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preparation example Construction

[0012] A kind of preparation method of the gelatin / PVA composite membrane that improves with inorganic montmorillonite, its process comprises the following steps:

[0013] (1) Preparation of polyvinyl alcohol solution: Weigh 4-11 parts by weight of polyvinyl alcohol into a three-necked flask, then weigh 80-105 parts by weight of distilled water into the three-necked flask, and place the flask at 80-90°C Stir in a constant temperature water bath until the polyvinyl alcohol is completely dissolved to obtain an aqueous solution of polyvinyl alcohol, i.e. solution A;

[0014] (2) Preparation of gelatin solution: Weigh 5-10 parts by weight of gelatin into a beaker, then add 80-100 parts by weight of distilled water into the beaker, swell at room temperature for 30 minutes, and stir in a constant temperature water bath at 50°C Until the gelatin is completely dissolved, filter to remove impurities to obtain a gelatin solution, i.e. B solution;

[0015] (3) Preparation of gelatin / PVA...

Embodiment 1

[0022] Weigh 10g of polyvinyl alcohol into a three-necked flask, add 90g of distilled water, mechanically stir in a constant temperature water bath at 90°C until it is completely dissolved, and then filter to remove impurities to obtain an aqueous solution of polyvinyl alcohol with a solution concentration of 10%;

[0023] Weigh 10g of gelatin and place it in a beaker, add 90g of distilled water, first swell at room temperature for 30min, then stir in a constant temperature water bath at 50°C until it is completely dissolved, then filter to remove impurities, and obtain a gelatin solution with a solution concentration of 10%;

[0024] Add the above polyvinyl alcohol solution and gelatin solution into a 250ml three-neck flask at a weight ratio of 4:1, then add 0.6% of the total weight of the two solutions of plasticizer ethylene glycol, and then store them at 0°C for 5 hours, then Add 0.05% sodium-based montmorillonite to the total weight of the two solutions, then mechanically ...

Embodiment 2

[0027] Weigh 10g of polyvinyl alcohol into a three-necked flask, add 90g of distilled water, mechanically stir in a constant temperature water bath at 90°C until it is completely dissolved, and then filter to remove impurities to obtain an aqueous solution of polyvinyl alcohol with a solution concentration of 10%;

[0028] Weigh 10g of gelatin and place it in a beaker, add 90g of distilled water, first swell at room temperature for 30min, then stir in a constant temperature water bath at 50°C until it is completely dissolved, then filter to remove impurities, and obtain a gelatin solution with a solution concentration of 10%;

[0029] Add the above polyvinyl alcohol solution and gelatin solution into a 250ml three-necked flask at a weight ratio of 4:1, then add 0.6% plasticizer glycerin to the total weight of the two solutions, store at 5°C for 2 hours, and then add two The total weight of the solution is 0.08% sodium-based montmorillonite, and then mechanically stirred and rea...

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Abstract

The invention provides a preparation method of gelatin / poli vinyl alcohol (PVA) composite films improved by inorganic imvite and relates to the preparation method of the gelatin / PVA films. PVA water solution and gelatin water solution are firstly prepared, then, two kinds of solution are mixed according to a certain proportion, plasticizers are added, then, the mixed solution is stored for a period of time at low temperature being 0 to 10 DEG C, a certain mount of inoganic imvite is added, then the mixed solution is stirred in thermostatic waterbath under 30-70 DEG C to be uniformly mixed, the uniformly mixed solution is poured into a mold for natural curtain coating, next, the materials are dried at the room temperature, and the gelatin / PVA composite films improved by the inorganic imvite are obtained. Compared with the ordinary films, the gelatin / PVA composite films prepared by the preparation method have the advantages that good compatibility and degradability are realized, meanwhile, the mechanical property is much better than that of ordinary films, and the tensile strength and the fracture elongation of the films are improved to different degrees.

Description

technical field [0001] The invention relates to a preparation method of a gelatin / PVA composite film, in particular to a preparation method of a gelatin / PVA composite film improved with inorganic montmorillonite. Background technique [0002] Gelatin is a protein composed of various amino acids and derived from animal bodies. It is a natural polymer material. Because of its good biocompatibility, degradability, and film-forming properties, it is often combined with other Or a variety of different synthetic polymer materials to prepare degradable composite materials, among many synthetic polymer materials, polyvinyl alcohol (PVA) is a commonly used polymer material, PVA is a non-toxic, non-toxic An irritating hydrophilic polymer with good bio-affinity, film-forming properties and good mechanical properties. The ordinary gelatin / PVA composite film prepared with these two materials can also be used in a certain ratio. It has the advantages of both materials, but in general its...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L29/04C08L89/00C08K13/02C08K3/34C08K5/053
Inventor 高喜平姚大虎赫玉欣陆昶张玉清李纪伟刘如意徐冉
Owner HENAN UNIV OF SCI & TECH
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