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Preparation method of composite film added with arginine acidified chitosan and zinc oxide nanoparticles

A technology of argininated chitosan and zinc oxide nano-technology, which is applied in the field of food packaging materials, can solve the problems of limited application, and achieve the effects of increased water contact angle, great application potential and prospects, and decreased water vapor transmission rate

Pending Publication Date: 2022-04-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan can only be dissolved in acidic solution, which greatly limits its application.

Method used

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  • Preparation method of composite film added with arginine acidified chitosan and zinc oxide nanoparticles
  • Preparation method of composite film added with arginine acidified chitosan and zinc oxide nanoparticles
  • Preparation method of composite film added with arginine acidified chitosan and zinc oxide nanoparticles

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for a composite antibacterial packaging film prepared by adding arginated chitosan and zinc oxide nanoparticles, the specific steps are as follows:

[0032] (1) Weigh 1 g of chitosan and dissolve it in 100 mL of MES buffer (25 mM, PH=5), stir on a magnetic stirrer for 1 h until it is completely dissolved, and the solution is transparent;

[0033] (2) Weigh 2.06 g of arginine and dissolve it in 50 mL of MES buffer, and stir on a magnetic stirrer for 5 min until it is completely dissolved.

[0034] (3) Weigh 3.4 g of 1-ethyl-(3-dimethylaminopropyl) carbodiimide (EDC) and 2.04 g of N-hydroxysuccinimide (NHS) into the arginine solution. , stir and activate on a magnetic stirrer for 2h;

[0035] (4) Drop the activated arginine solution into the chitosan solution, and heat it up to 45°C in a magnetic stirrer for 12 hours.

[0036] (5) Weigh 0.5g of arginated chitosan and dissolve it in 50mL of deionized water, heat it up to 70°C in a magnetic stirrer and stir for 1...

Embodiment 2

[0043] A method for a composite antibacterial packaging film prepared by adding arginated chitosan and zinc oxide nanoparticles, the specific steps are as follows:

[0044] (1) Weigh 1 g of chitosan and dissolve it in 100 mL of MES buffer (25 mM, PH=5), stir on a magnetic stirrer for 1 h until it is completely dissolved, and the solution is transparent;

[0045] (2) Weigh 2.06 g of arginine and dissolve it in 50 mL of MES buffer, and stir on a magnetic stirrer for 5 min until it is completely dissolved.

[0046] (3) Weigh 3.4 g of 1-ethyl-(3-dimethylaminopropyl) carbodiimide (EDC) and 2.04 g of N-hydroxysuccinimide (NHS) into the arginine solution. , stir and activate on a magnetic stirrer for 2h;

[0047] (4) Drop the activated arginine solution into the chitosan solution, and heat it up to 45°C in a magnetic stirrer for 12 hours.

[0048] (5) Weigh 0.5g of arginated chitosan and dissolve it in 50mL of deionized water, heat it up to 70°C in a magnetic stirrer and stir for 1...

Embodiment 3

[0055] A method for a composite antibacterial packaging film prepared by adding arginated chitosan and zinc oxide nanoparticles, the specific steps are as follows:

[0056] (1) Weigh 1 g of chitosan and dissolve it in 100 mL of MES buffer (25 mM, PH=5), stir on a magnetic stirrer for 1 h until it is completely dissolved, and the solution is transparent;

[0057] (2) Weigh 2.06 g of arginine and dissolve it in 50 mL of MES buffer, and stir on a magnetic stirrer for 5 min until it is completely dissolved.

[0058] (3) Weigh 3.4 g of 1-ethyl-(3-dimethylaminopropyl) carbodiimide (EDC) and 2.04 g of N-hydroxysuccinimide (NHS) into the arginine solution. , stir and activate on a magnetic stirrer for 2h;

[0059] (4) Drop the activated arginine solution into the chitosan solution, and heat it up to 45°C in a magnetic stirrer for 12 hours.

[0060] (5) Weigh 0.5g of arginated chitosan and dissolve it in 50mL of deionized water, heat it up to 70°C in a magnetic stirrer and stir for 1...

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Abstract

The invention discloses a preparation method of a composite film added with arginated chitosan and zinc oxide nanoparticles, and relates to the field of food packaging. The preparation method comprises the following steps: by taking polyvinyl alcohol (PVA) as a matrix, modifying chitosan by using arginine through amidation reaction to obtain arginine acidified chitosan (ACS), and preparing ACS-ZnO by taking the ACS and zinc nitrate hexahydrate (ZnNO36H2O) as raw materials through a coprecipitation method; finally, ACS and ACS-ZnO are blended and added into a PVA matrix, and the composite film with the synergistic antibacterial effect is prepared. The composite film prepared by the method has the advantages of good mechanical property, ultraviolet barrier property, lower water vapor permeability, excellent antibacterial property and the like, and can be used as an antibacterial environment-friendly packaging material.

Description

technical field [0001] The invention relates to a preparation method of a composite film added with arginated chitosan and zinc oxide nanoparticles. The invention belongs to the field of food packaging materials. Background technique [0002] With the development of science and technology and the improvement of human production level, the quantity and types of food on people's table are becoming more and more abundant, and along with it, people's requirements for food packaging are getting higher and higher. However, most of the food packaging on the market is non-degradable petroleum-based plastic packaging, which causes serious harm to the global environment. Polyvinyl alcohol (PVA) is a water-soluble vinyl polymer with good mechanical properties, non-toxic and degradable, and is expected to become a food packaging material accepted by the public. [0003] As a biodegradable natural polymer material, chitosan has good film-forming properties, biocompatibility and antibac...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L29/04C08L5/08C08K3/22
CPCC08J5/18C08J2329/04C08J2405/08C08K2003/2296C08K2201/011
Inventor 牛宝龙李文凤任力旋王慧芳高向华
Owner TAIYUAN UNIV OF TECH