Biodegradable composite film and preparation method thereof

A composite film, biological technology, applied in the direction of biological packaging, sustainable manufacturing/processing, flexible covering, etc., can solve the problems such as unreported edible film, achieve excellent mechanical properties and barrier properties, reduce migration, heat Good sealing performance

Inactive Publication Date: 2012-10-10
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, scholars at home and abroad have done a lot of useful research on some of its functional properties, but there is no report on the edible film with egg white protein as the main material of the film.

Method used

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  • Biodegradable composite film and preparation method thereof
  • Biodegradable composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of biodegradable composite film, it is made as follows:

[0026] 1. Raw materials: the plasticizer is glycerin and polyethylene glycol 400 with a volume ratio of 3:1, the crosslinking agent is epichlorohydrin, the reinforcing agent is sodium carboxymethylcellulose, egg white protein and nano-SiOx, among which the plasticizer is The addition amount of the agent in the final whole membrane liquid system is 30.9g / L, the strengthening agent is 5.5g / L, the crosslinking agent is 7.1g / L, the egg white protein is 80g / L, and the nano-SiOx is 1g / L;

[0027] 2. Add nano-SiOx into distilled water, and use an ultrasonic material disperser to disperse nano-SiOx evenly in water to obtain nano-SiOx suspension;

[0028] 3. Add egg white protein and the above-mentioned plasticizer to the uniformly dispersed nano-SiO suspension, stir evenly with a magnetic force, and adjust the pH value of the solution to 7 with 1mol / L NaOH;

[0029] 4. Then add sodium carboxymethyl cellulose and ...

Embodiment 2

[0032] A kind of biodegradable composite film, it is to make as follows:

[0033] 1. Raw materials: the plasticizer is glycerin and polyethylene glycol 400 with a volume ratio of 3:1, the crosslinking agent is epichlorohydrin, the reinforcing agent is sodium carboxymethylcellulose, egg white protein and nano-SiOx, among which the plasticizer is The addition amount of the agent is 30.9g / L, the strengthening agent is 5.5g / L, the crosslinking agent is 7.1g / L, the egg white protein is 80g / L, and the nano-SiOx is 1g / L;

[0034] 2. Add nano-SiOx into distilled water, and use an ultrasonic material disperser to disperse nano-SiOx evenly in water to obtain nano-SiOx suspension;

[0035] 3. Add egg white protein, the above-mentioned plasticizer, sodium carboxymethylcellulose and epichlorohydrin to the above-mentioned homogeneously dispersed nano-SiOx suspension, and magnetically stir to obtain a film liquid; apply the film liquid to a plastic plate and cast it into a Put the plastic p...

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Abstract

The invention provides a biodegradable composite film, which is prepared from a plasticizer, a reinforcing agent, a crosslinking agent, egg white protein and nano SiOx which serve as raw materials, wherein the plasticizer consists of glycerol and polyethylene glycol 400 with volume ratio of 3 to 1; the reinforcing agent is CMC-Na (sodium carboxymethylcellulose); and the crosslinking agent is epichlorohydrin. The biodegradable composite film has excellent mechanical performance and isolation performance, has the use performance of a plastic coating film, and can completely replace a conventional plastic package film.

Description

technical field [0001] The invention relates to a composite membrane and a preparation method thereof, in particular to a biodegradable composite membrane and a preparation method thereof, belonging to the technical field of environmental protection. Background technique [0002] Traditional chemically synthesized plastics are widely used in food packaging and preservation because of their light weight, high strength, good processability, and low price. However, chemically synthesized plastic products are discarded after use and are not degradable or have a low degree of degradation in the natural environment, resulting in serious "white pollution". In addition, non-renewable resources such as oil and natural gas are used less and less. It is reported that the oil reserves in the world can only be used for 41 years. Therefore, the production of petroleum-based plastics is greatly hindered. New degradable packaging materials are developed to replace traditional packaging mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08L1/26C08K13/02C08K5/053C08K5/06C08K5/1515C08K3/34C08J5/18B65D65/46
CPCY02A40/90Y02W90/10
Inventor 汪学荣周玲
Owner SOUTHWEST UNIV
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