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Ag-MOF composite chitosan-based film as well as preparation method and application thereof

A chitosan and film technology, applied in the field of AgMOF composite chitosan-based film and its preparation, can solve the problems of non-degradability and lack of functionality, hinder the wide application of plastic films, etc., and achieve good air permeability, sterilization, The effect of good sustained release antibacterial properties and good mechanical properties

Pending Publication Date: 2022-06-17
SUZHOU ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of polymer materials is good, the non-degradability of raw materials and the lack of functionality hinder the wide application of plastic films

Method used

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  • Ag-MOF composite chitosan-based film as well as preparation method and application thereof
  • Ag-MOF composite chitosan-based film as well as preparation method and application thereof
  • Ag-MOF composite chitosan-based film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A preparation method of Ag MOF composite chitosan-based film, specifically comprising the following steps:

[0060] (1) 60 mg of silver acetate AgC 2 H 3 O 2 Dissolved in 20ml of deionized water and mixed to form a silver acetate solution, 20mg of 2-aminoterephthalic acid C 8 H 7 NO 4 Dissolved in 20ml of absolute ethanol and mixed evenly to form a 2-aminoterephthalic acid solution, the two solutions were quickly mixed and left to stand for 48h, and then ultrasonically dispersed for 4h at an ultrasonic frequency of 25kHz, followed by a rotating speed of 10000r / min. After centrifugation for 15 min, the product in the centrifuge tube was washed with absolute ethanol, and the centrifugation washing operation was repeated 3 times. After drying in a vacuum drying oven at a drying temperature of 60 °C for 24 h, the product was taken out as Ag MOF.

[0061] (2) Add 2g of chitosan powder to 100ml of 2% acetic acid solution and stir to form a chitosan solution. The stirrin...

Embodiment 2

[0065] A preparation method of Ag MOF composite chitosan-based film is similar to Embodiment 1, and the difference is that it specifically includes the following steps:

[0066] (1) 60mgAgC 2 H 3 O 2 Dissolved in 20ml of deionized water and mixed to form a silver acetate solution, 20mg C 8 H 7 NO 4 Dissolved in 20ml of absolute ethanol and mixed evenly to form a 2-aminoterephthalic acid solution, the two solutions were quickly mixed and left to stand for 56h, then ultrasonically dispersed for 5h at an ultrasonic frequency of 25kHz, followed by a rotating speed of 8000r / min. After centrifugation for 20 min, the product in the centrifuge tube was washed with absolute ethanol, and the centrifugation washing operation was repeated 3 times. After drying for 36 h at a temperature of 60 °C in a vacuum drying oven, the product was taken out as Ag MOF.

[0067] (2) Add 2g of chitosan powder (degree of deacetylation ≥95%, viscosity 100-200mpa) into 100ml of 2% acetic acid solution...

Embodiment 3

[0071] A preparation method of Ag MOF composite chitosan-based film is similar to Embodiment 1, and the difference is that it specifically includes the following steps:

[0072] (1) 60mgAgC 2 H 3 O 2 Dissolved in 20ml of deionized water and mixed to form a silver acetate solution, 20mg C 8 H 7 NO 4 Dissolved in 20ml of absolute ethanol and mixed uniformly to form a 2-aminoterephthalic acid solution, the two solutions were quickly mixed and left to stand for 72h, and then ultrasonically dispersed for 6h at an ultrasonic frequency of 25kHz, followed by a rotating speed of 10000r / min. After 20 min of centrifugation, the product in the centrifuge tube was washed with absolute ethanol, and the centrifugation and washing operation was repeated 5 times. After drying at 60 °C for 48 h in a vacuum drying oven, the product was taken out as Ag MOF.

[0073] (2) Add 2g of chitosan powder to 100ml of 2% acetic acid solution and stir evenly to form a chitosan solution (stirring speed ...

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Abstract

The invention provides an Ag-MOF composite chitosan-based film as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a product Ag-MOF by taking silver acetate and 2-aminoterephthalic acid as raw materials through a solvothermal method; and 2) adding different amounts of Ag MOF into the chitosan-based film-forming solution, and casting to form the film. The Ag MOF composite chitosan-based thin film prepared by the method is composed of Ag MOF nanoparticles and a thin film substrate, and uniform Ag MOF particles are distributed on the surface of the thin film. The preparation method disclosed by the invention has the characteristics that the preparation process is simple, and the obtained film material has good air permeability, bactericidal property and the like, and can be used as a slow-release antibacterial food packaging material for prolonging the preservation period of food.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials and polymer composite materials, in particular to an Ag MOF composite chitosan-based film and a preparation method and application thereof. Background technique [0002] Polymer materials have good barrier properties to light, oxygen and water vapor and play an important role in modern food packaging. Despite the good performance of polymer materials, the non-degradability of their raw materials and the lack of functionality hinder the widespread application of plastic films. Biodegradable nanocomposites are the addition of antibacterial agents and oxygen scavengers to degradable films, which can not only enhance the functional properties of food packaging materials, but also are expected to replace non-degradable traditional plastic films, making them more environmentally friendly. Nanomaterial-composite polymer materials have achieved remarkable results in modified at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L87/00C08L29/04C08K5/053C08K5/09C08K5/13C08G83/00C08J5/18B65D81/28B65D65/02
CPCC08J5/18C08G83/008B65D65/02B65D81/28C08J2305/08C08J2487/00C08J2429/04C08K5/053C08K5/09C08K5/13
Inventor 全鑫瑶王毓宁马佳佳黄桂丽孙灵湘隋思瑶
Owner SUZHOU ACADEMY OF AGRI SCI
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