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Degradable film with antibacterial function, and preparation method thereof

A technology for degrading films and functions, applied to flexible coverings, packaging, wrapping paper, etc., can solve the problems of inability to completely inhibit the growth of psychrophilic microorganisms, sticky, moldy and discolored surfaces, and affect commercial value, and achieve the purpose of inhibiting harmful microorganisms, Improved barrier properties and poor water resistance

Active Publication Date: 2020-06-12
BEIJING UNIV OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the packaging of cold fresh meat in my country is simple, and it will be directly or indirectly affected by environmental factors such as oxygen and light during storage and transportation, and the refrigerated environment cannot completely inhibit the growth of psychrophilic microorganisms, and it is very easy to lose juice and surface. Corruption and deterioration such as stickiness, mildew and discoloration not only affect its commercial value, but also cause waste of resources

Method used

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  • Degradable film with antibacterial function, and preparation method thereof
  • Degradable film with antibacterial function, and preparation method thereof
  • Degradable film with antibacterial function, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example is used to illustrate the preparation method of the degradable film with antibacterial function according to the present invention.

[0051] Specific steps are as follows:

[0052] 1. Preparation of GML / HP-β-CD inclusion complex

[0053] S1: Dissolve 300mg of HP-β-CD in 30mL of distilled water and stir on a magnetic stirrer at 60°C and 400r / min until completely dissolved. Dissolve 57.75mg of GML in 8mL of ethanol, wait until it is completely dissolved, add it into HP-β-CD, then add 1mL of ethanol, the reaction temperature is 60°C, the stirring speed is 400r / min, and the inclusion time is 1h, until it becomes Completely transparent.

[0054] S2: Place the transparent sample liquid obtained in S1 on a rotary evaporator, depressurize, and evaporate the ethanol completely at 70-80°C. No foam will appear during the process, then raise the temperature to 80-90°C, and evaporate the sample completely. Dry and vacuum-dry to obtain the GML / / HP-β-CD inclusion compoun...

Embodiment 2

[0063] The difference between this example and Example 1 is that in the step of preparing the GML / HP-β-CD / CS / PVA film, the addition amount of the GML / HP-β-CD clathrate was changed to 0.15%.

Embodiment 3

[0065] The difference between this example and Example 1 is that in the step of preparing the GML / HP-β-CD / CS / PVA film, the addition amount of the GML / HP-β-CD clathrate was changed to 0.20%.

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Abstract

The invention discloses a degradable film with an antibacterial function, and a preparation method thereof. The preparation method comprises the following steps: carrying out inclusion on glycerol monolaurate (GML) by utilizing hydroxypropyl-beta-cyclodextrin (HP-beta-CD), adding a glycerol monolaurate inclusion compound (GML / HP-beta-CD) with an antibacterial property into a chitosan / polyvinyl alcohol (CS / PVA) thin film system, and blending to obtain the polyvinyl alcohol-chitosan bio-based film compounded with the antibacterial functional factor lauric acid monoglyceride. The degradable filmcan be used for storing, transporting and selling chilled fresh meat and fresh aquatic products, harmful microorganisms are inhibited, and the original quality and commodity value of fresh foods are kept to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping film materials, in particular to a degradable film with antibacterial function and a preparation method thereof. Background technique [0002] Chilled fresh meat and fresh aquatic products stored under refrigerated conditions are prone to spoilage because the moisture is not frozen. However, the packaging of cold fresh meat in my country is simple, and it will be directly or indirectly affected by environmental factors such as oxygen and light during storage and transportation, and the refrigerated environment cannot completely inhibit the growth of psychrophilic microorganisms, and it is very prone to juice loss and surface growth. Corruption and deterioration such as stickiness, mildew and discoloration not only affect its commercial value, but also cause waste of resources. [0003] With the improvement of people's living standards, consumers have higher and higher requirements for the qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L5/08C08L5/16C08K9/10C08K5/103C08J5/18B65D65/46
CPCC08J5/18B65D65/466C08J2329/04C08J2405/08C08J2405/16C08K9/10C08K5/103
Inventor 杜斌冯思雨智秀娟
Owner BEIJING UNIV OF AGRI
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