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A kind of chitosan composite film and preparation method thereof

A technology of chitosan and composite film, which is applied in the field of packaging film, can solve problems such as fragility, shortage, and limited use range, and achieve the effects of excellent oxygen barrier performance, good air permeability, and good mechanical properties

Active Publication Date: 2016-05-04
WUJIANG YINGLIDA PLASTIC PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength of glutinous rice paper is low and easy to break, so its application range is limited.
At present, there is still a lack of non-toxic and decomposable food packaging containers in our country. How to use natural biological materials to make such appliances remains to be developed.

Method used

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  • A kind of chitosan composite film and preparation method thereof
  • A kind of chitosan composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The used raw material formula of the chitosan composite membrane prepared by embodiment 1 to 4

[0011]

[0012] Dissolve acetic acid in water to form an acetic acid solution with a volume ratio of 1%, then dissolve chitosan in the acetic acid solution to form an aqueous acetic acid solution of chitosan; dissolve cornstarch and cross-linked hydroxypropyl starch in water, Gelatinize at 90°C-100°C for 20min-30min, set aside; mix chitosan acetic acid aqueous solution and starch solution, then add gelatin, methylcellulose, glycerin, stearic acid, palmitic acid and the remaining amount of water , stirring and mixing at 80°C to 100°C for 20min to 50min, then defoaming the mixed solution, leaving it to stand, and casting to form a film.

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Abstract

The invention provides a chitosan composite film which comprises the following components in parts by weight: 20-30 parts of chitosan, 5-8 parts of corn starch, 4-7 parts of crosslinked hydroxypropyl starch, 3-6 parts of gelatin, 1-3 parts of methyl cellulose, 3-9 parts of glycerol, 2-5 parts of stearic acid, 1-4 parts of palmic acid, 0.5-2 parts of acetic acid and 50-100 parts of water. The chitosan composite film provided by the invention is degradable and edible, and has the advantages of favorable mechanical properties, favorable air permeability and the like.

Description

technical field [0001] The invention belongs to the technical field of packaging films, and in particular relates to a chitosan composite film and a preparation method thereof. Background technique [0002] At present, the most widely used packaging material for food packaging is plastic, which is easy to form and can be processed into various packaging bags or containers. The packaging or containers for instant noodles and disposable tableware that are popular in the market are all made of nylon or foam plastics. to make. Plastic packaging containers are mainly made of polyethylene and polyvinyl chloride. After they are packaged, they are prone to produce harmful gases and odors, and have certain toxic effects on the human body. They are not easy to recycle after being discarded, and are not easy to decompose by themselves. They persist for a long time and cause environmental pollution. In recent years, in some developed countries in the West, plastic food packaging conta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08C08L3/02C08L3/08C08L89/00C08L1/28C08K5/053C08K5/09C08J5/18
Inventor 倪迪
Owner WUJIANG YINGLIDA PLASTIC PACKAGING