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Preparation method of water-soluble chitosan/polyvinyl alcohol composite films

A water-soluble chitosan, polyvinyl alcohol technology, applied in the direction of flexible covering, climate sustainability, sustainable manufacturing/processing, etc., to achieve the effects of environmental friendliness, excellent mechanical properties, and high production efficiency

Inactive Publication Date: 2012-06-20
常州绿之源高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiency of the above-mentioned single component preparation packaging material, the object of the present invention is to provide a kind of water-soluble chitosan / polyvinyl alcohol composite film and its preparation method that can be applied to the preparation of biological packaging material conveniently and have the advantages of both components

Method used

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  • Preparation method of water-soluble chitosan/polyvinyl alcohol composite films

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The raw materials and their weight ratios are as follows: the water-soluble chitosan is 1% of N-maleoylated chitosan, the polyvinyl alcohol is 30% of PVA-0588, and the crosslinking agent is 7% of glutaraldehyde.

[0021] Add N-maleoylated chitosan to deionized water, stir and dissolve at room temperature; add PVA-0588 to deionized water, heat up to 80-95°C while stirring to dissolve; add chitosan solution to polyvinyl alcohol solution After stirring at 80-95°C to make it evenly dispersed, it is poured onto flat glass and cast to form a film. The solvent is evaporated at room temperature, immersed in glutaraldehyde solution for cross-linking for 40-60 minutes, peeled off, and dried naturally or dried to obtain a water-soluble chitosan / polyvinyl alcohol composite film.

Embodiment 2

[0023] The raw materials and their weight ratios are as follows: water-soluble chitosan is 2% of carboxymethyl chitosan, polyvinyl alcohol PVA-1788 is 10%, crosslinking agent is 3% of glutaraldehyde, and borax is 2%.

[0024] Add carboxymethyl chitosan to deionized water, stir and dissolve at room temperature; add PVA-1788 to deionized water, heat up to 80-95°C while stirring to dissolve; add chitosan solution to polyvinyl alcohol solution, 80 After stirring at -95°C to disperse evenly, pour it onto flat glass and cast it into a film. The solvent is evaporated at room temperature, immersed in a mixed solution of glutaraldehyde and borax to crosslink for 40-60 minutes, peeled off, and dried naturally or oven-dried to obtain a water-soluble chitosan / polyvinyl alcohol composite film.

Embodiment 3

[0026] Raw materials and their weight ratios are: water-soluble chitosan is hydroxypropyltrimethylammonium chloride chitosan 4%, polyvinyl alcohol is PVA-1792 40%, crosslinking agent is glutaraldehyde 3%, trimer Sodium Phosphate 2%, Epichlorohydrin 3%.

[0027] Add hydroxypropyltrimethylammonium chloride chitosan into deionized water, stir and dissolve at room temperature; add PVA-1792 into deionized water, heat up to 80-95°C while stirring to dissolve; add chitosan solution to poly In the vinyl alcohol solution, stir at 80-95°C to disperse evenly, pour it on a petri dish and cast it into a film. Volatilize the solvent at room temperature, immerse in the mixed solution of glutaraldehyde, sodium tripolyphosphate and epichlorohydrin for crosslinking for 40-60min, peel off, dry naturally or dry to obtain a water-soluble chitosan / polyvinyl alcohol composite film.

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Abstract

The invention discloses a preparation method of water-soluble chitosan / polyvinyl alcohol composite films capable of being used as biological package materials. Water-soluble chitosan and polyvinyl alcohol are respectively dissolved in deionized water, the solution is subjected to mixing casting for forming films, then, the films are soaked into one kind of solution or several kinds of mixed solution from glutaraldehyde solution, borax solution, epichlorohydrin, glyoxal and sodium tripolyphosphate to be subjected to crosslinking for 40 to 60 minutes, peeling and natural drying or baking are carried out, and the water-soluble chitosan / polyvinyl alcohol composite films are obtained. The composite films have good antibacterial activity, biocompatibility and biodegradability, in addition, special gas blocking performance and excellent mechanical performance are realized, and the composite films have the advantages of chitosan and the polyvinyl alcohol. In addition, the production cost is low, the preparation process is simple, the production efficiency is high, and the environment is friendly.

Description

technical field [0001] The invention relates to a biological packaging material, in particular to a preparation method of a water-soluble chitosan / polyvinyl alcohol composite film. Background technique [0002] Chitosan (chitosan, (1,4)-2-amino-2-deoxy-β-D-glucan) is the deacetylation product of chitin, because of its good biocompatibility, biodegradability , antibacterial, film-forming and non-toxic, so it is widely used in environmental protection, medicine, chemical industry, food and other fields. However, chitosan is only soluble in some dilute acid solutions, insoluble in water and common organic solvents, which greatly limits its application. There are reactive groups such as hydroxyl and amino groups on chitosan molecules, and methods such as degradation and chemical modification can be used to improve its solubility and increase its water solubility to prepare water-soluble chitosan. Water-soluble chitosan is generally divided into three categories: (1) control th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J3/24C08L29/04C08L5/08B65D65/38
CPCY02W90/10
Inventor 禇鹏飞
Owner 常州绿之源高分子材料有限公司
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