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Chitosan/nano montmorillonite/akebia trifoliata peel extract antibacterial film as well as preparation method and application thereof

A technology of nano-montmorillonite and fruit peel extract, which is applied in the field of food preservation materials and can solve the problem of high cost

Active Publication Date: 2021-04-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method is more costly

Method used

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  • Chitosan/nano montmorillonite/akebia trifoliata peel extract antibacterial film as well as preparation method and application thereof
  • Chitosan/nano montmorillonite/akebia trifoliata peel extract antibacterial film as well as preparation method and application thereof
  • Chitosan/nano montmorillonite/akebia trifoliata peel extract antibacterial film as well as preparation method and application thereof

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preparation example Construction

[0036] The present invention provides the preparation method of chitosan / nanometer montmorillonite / Akebia trifoliate peel extract antibacterial film described in the above technical scheme, comprising the following steps:

[0037] (1) Chitosan is mixed with acetic acid, water, glycerin and Tween 80 to obtain a chitosan solution;

[0038] (2) the chitosan solution that described step (1) obtains is mixed with nanometer montmorillonite and Akebia trifoliate peel extract, obtains composite film liquid;

[0039] (3) The composite film solution obtained in the step (2) is formed into a film to obtain an antibacterial film of chitosan / nano-montmorillonite / Akebia trifoliate peel extract.

[0040] The invention mixes chitosan with acetic acid, water, glycerin and Tween 80 to obtain chitosan solution.

[0041] The present invention has no special limitation on the operation of mixing chitosan with acetic acid, water, glycerin and Tween 80, and the technical scheme of mixing materials ...

Embodiment 1

[0053] Chitosan / nano-montmorillonite / Akebia peel extract antibacterial film is prepared from the following raw materials: chitosan 1.5% (number average molecular weight 4.4KDa, degree of deacetylation 88.1%), acetic acid 1%, glycerin 0.5%, Tween 800.1%, nano-montmorillonite 0.2% (particle size 150nm), Akebia trifoliate peel extract 0.2% (particle size 0.2mm) and sterile deionized water 96.5%.

[0054] The preparation method of chitosan / nanometer montmorillonite / Akebia peel extract antibacterial film is:

[0055] (1) Dissolve 1 g of acetic acid in 96.5 g of sterile deionized water to obtain an acetic acid solution, add 1.5 g of chitosan, 0.5 g of glycerin, and 0.1 g of Tween 80, stir at 25° C. and 250 r / min for 30 min to obtain a chitosan solution ;

[0056] (2) Add 0.2g nano-montmorillonite and 0.2g Akebia trifoliate peel extract to the chitosan solution, and stir at 250r / min for 30min to obtain a composite film liquid;

[0057] (3) Place the composite membrane liquid in an ...

Embodiment 2

[0061] The chitosan / nano-montmorillonite / Akebia peel extract antibacterial film is prepared from the following raw materials: 1.5% chitosan (number-average molecular weight 4.4KDa, deacetylation degree 88.1%), 1.5% acetic acid, glycerol 0.5%, Tween 800.1%, nano-montmorillonite 0.2% (particle size 150nm), Akebia trifoliate peel extract 0.1% (particle size 0.2mm) and sterile deionized water 96.1%.

[0062] The preparation method of chitosan / nanometer montmorillonite / Akebia peel extract antibacterial film is:

[0063] (1) Dissolve 1.5g acetic acid in 96.1g sterile deionized water to obtain an acetic acid solution, add 1.5g chitosan, 0.5g glycerin, 0.1g Tween 80, stir at 25°C and 250r / min for 30min to obtain chitosan solution;

[0064] (2) Add 0.2g nano-montmorillonite and 0.1g Akebia trifoliate peel extract to the chitosan solution, and stir at 250r / min for 30min to obtain a composite film liquid;

[0065] (3) Place the composite membrane liquid in an ultrasonic instrument, deg...

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Abstract

The invention provides a chitosan / nano montmorillonite / akebia trifoliate peel extract antibacterial film as well as a preparation method and application thereof, and belongs to the field of food fresh-keeping materials. The chitosan / nano montmorillonite / akebia trifoliata peel extract antibacterial film provided by the invention is prepared from the following raw materials: 1.5%-2.5% of chitosan, 1.0%-1.5% of acetic acid, 0.25%-0.75% of glycerol, 0.1%-0.2% of Tween 80, 0.05%-0.4% of nano montmorillonite, 0.05%-0.4% of akebia trifoliata peel extract and the balance of water. The nano montmorillonite is utilized to enhance the mechanical properties of the antibacterial film; and bioactive components in the akebia trifoliata peel extract improve the antibacterial property and antioxidant activity of the membrane. Experimental results show that the tensile strength of the antibacterial film provided by the invention is 13.28 MPa, the DPPH free radical scavenging rate is 19.56%, and the antibacterial film has an excellent antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of food preservation materials, in particular to a chitosan / nano-montmorillonite / Akebia peel extract antibacterial film and a preparation method and application thereof. Background technique [0002] Most of the fresh-keeping films for traditional packaged foods are plastic packaging products processed from polyethylene, polyvinyl chloride, etc., but they are difficult to decompose, which will bring serious plastic waste pollution problems, and will decompose after heating. Harmful substances, while limited oil resources also limit the development of the plastics industry. Therefore, the use of natural polymer materials such as polysaccharides, starch, and cellulose to prepare biodegradable materials has attracted widespread attention. Among many natural substances, chitosan is a natural polymer obtained after deacetylation of chitin. It is rich in content and has good safety, degradability and film-forming...

Claims

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Application Information

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IPC IPC(8): C08L5/08C08L5/06C08K5/09C08K5/13C08K3/34C08J5/18
CPCC08J5/18C08J2305/08C08J2405/06C08K5/09C08K5/13C08K3/346C08K2201/011
Inventor 邓云江永利尹浩周学府钟宇王丹凤
Owner SHANGHAI JIAO TONG UNIV
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