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Degradable antibacterial film and preparation method thereof

A technology of antibacterial film and film-forming solution, which is applied in the field of film materials, can solve problems such as poor compatibility, and achieve the effects of no drug resistance, significant antibacterial performance, and excellent antibacterial effect

Active Publication Date: 2021-11-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention improves the problem of poor compatibility between porphyrin metal-organic framework materials and polycaprolactone by selecting N,N-dimethylformamide as the film-forming medium

Method used

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  • Degradable antibacterial film and preparation method thereof
  • Degradable antibacterial film and preparation method thereof
  • Degradable antibacterial film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of preparation method of degradable antibacterial film [recorded as: polycaprolactone / MOF-545 (3%)], comprises the following steps:

[0057] 1) Preparation of porphyrin metal-organic framework (MOF-545):

[0058] Weigh 12.5 mg of zirconium oxychloride octahydrate, add 10 mL of N,N-dimethylformamide, and sonicate for 30 min to dissolve it. Add 2.5 mg of tetra-carboxyphenylporphyrin, sonicate for 10 minutes, and finally add 0.6 mL of glacial acetic acid to mix well, transfer the mixed solution to a polytetrafluoroethylene autoclave, put it in an oven, and slowly raise the temperature to 65 ° C, react for 3 days, and react Slowly cool down to room temperature. The product was collected by centrifugation (12000rpm, 20min), and the obtained product was successively washed three times with N,N-dimethylformamide (12000rpm, 20min), washed three times with acetone (12000rpm, 20min), and finally dried in a vacuum oven at 60°C for 24h ;

[0059] 2) Preparation of degrada...

Embodiment 2

[0065] A kind of preparation method of degradable antimicrobial film [denoted as: polycaprolactone / MOF-545 (5%)], comprises the following steps:

[0066] 1) with embodiment 1;

[0067] 2) Preparation of degradable antibacterial film:

[0068] Solution A: Weigh 220mg of polycaprolactone and add 2.2mL of N,N-dimethylformamide, sonicate for 30min to dissolve completely, and obtain a mass concentration of 100mg mL -1 Polycaprolactone solution;

[0069] Dispersion B: Weigh 30mg MOF-545, add 3mL N,N-dimethylformamide and sonicate for 30min to obtain a mass concentration of 10mg mL -1 MOF-545 dispersion;

[0070] Take 655 μL of solution A and 345 μL of dispersion B, mix it, cast it on a glass mold and spread it evenly, place it in a constant temperature hot blast oven at 37°C, and slowly evaporate N,N-dimethylformamide. After about 3 hours, the solvent was completely evaporated, and a small amount of methanol was added to wet the mixed film and slowly peeled off, and dried in vac...

Embodiment 3

[0072] A kind of preparation method of degradable antimicrobial film [denoted as: polycaprolactone / MOF-545 (10%)], comprises the following steps:

[0073] 1) with embodiment 1;

[0074] 2) Preparation of degradable antibacterial film:

[0075] Solution A: Weigh 220mg of polycaprolactone and add 2.2mL of N,N-dimethylformamide, sonicate for 30min to dissolve completely, and obtain a mass concentration of 100mg mL -1 Polycaprolactone solution;

[0076] Dispersion B: Weigh 30mg MOF-545, add 3mL N,N-dimethylformamide and sonicate for 30min to obtain a mass concentration of 10mg mL -1 MOF-545 dispersion;

[0077] Take 621 μL of solution A and 690 μL of dispersion B, mix it, cast it on a glass mold and spread it evenly, place it in a constant temperature hot blast oven at 37°C, and slowly evaporate N,N-dimethylformamide. After about 3 hours, the solvent was completely evaporated, and a small amount of methanol was added to wet the mixed film and slowly peeled off, and dried in va...

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Abstract

The invention relates to a degradable antibacterial film and a preparation method thereof, and belongs to the technical field of film materials. The method comprises: synthesizing a porphyrin metal organic framework material from an acidity regulator, a zircon salt and tetra-carboxyl phenyl porphyrin through a solvothermal reaction; and dissolving the porphyrin metal organic framework material in N, N-dimethylformamide, and mixing with polycaprolactone dissolved in N, N-dimethylformamide to prepare the degradable food antibacterial packaging film which is used for resisting bacteria of fresh-cut apples. The degradable antibacterial film prepared by the invention can realize efficient sterilization of the surfaces of fresh-cut apples, can avoid water loss of the apples and prevent browning of apple pulp to a certain extent, can be repeatedly used, has the advantage of biodegradability, and cannot cause adverse effects on the environment, so that the antibacterial film has a huge application prospect in the field of food antibacterial packaging.

Description

technical field [0001] The invention relates to a degradable antibacterial film and a preparation method thereof, belonging to the technical field of film materials. Background technique [0002] Microbial safety in food has been a food safety issue that everyone has been paying attention to for a long time. Microbial contamination in food will not only cause waste of food resources, but also cause economic losses and even cause foodborne diseases, threatening human life and health. Therefore, the control of harmful microorganisms in food is a crucial issue in food safety. Most of the traditional sterilization methods have the problem of residual toxic substances and destroying the nutritional content of food. Therefore, it is necessary to develop a safe and efficient cold sterilization method in the food industry. [0003] The principle of photodynamic sterilization is that the photosensitizer converts oxygen into active oxygen (mainly singlet oxygen) under the irradiation...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L67/04C08L87/00C08G83/00
CPCC08J5/18C08G83/008C08J2367/04C08J2487/00Y02W90/10
Inventor 陈丽建严秀平刘瑶瑶王江悦龚嘉华
Owner JIANGNAN UNIV
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