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Method for preparing chitosan/multilayer hybrid nanoparticle antibacterial preservative film

A technology of hybrid nanoparticle and chitosan, which is applied in the field of food packaging to achieve excellent antibacterial and mechanical properties

Inactive Publication Date: 2018-04-06
CHANGDE JINDE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Combining chitosan, nano-cerium dioxide and phosphotungstic acid to prepare antibacterial plastic wrap has not been reported in the literature

Method used

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  • Method for preparing chitosan/multilayer hybrid nanoparticle antibacterial preservative film
  • Method for preparing chitosan/multilayer hybrid nanoparticle antibacterial preservative film
  • Method for preparing chitosan/multilayer hybrid nanoparticle antibacterial preservative film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of organic-inorganic hybrid nanomaterials:

[0024] 1) Disperse 3.0g of nanometer cerium oxide and 1.3g of phosphotungstic acid in 100ml of tetrahydrofuran (the volume ratio of tetrahydrofuran to water is 1:2), and ultrasonically disperse for 30 minutes to obtain a dispersion;

[0025] 2) Heat the dispersion to 55°C, then add phosphoric acid dropwise to adjust the pH to 3.6, then add 2.4g of 2,2'-biimidazole, conduct a hydrothermal reaction at 60°C for 24 hours, then desolvate under reduced pressure at 45°C to obtain a gray-yellow powder , the gray-yellow powder was placed in n-heptane at 50° C. for 2 h, then filtered, aged at 80° C. for 6 h, and pulverized to obtain organic-inorganic hybrid nanomaterials.

[0026] Prepare chitosan / multilayer hybrid nanoparticle antibacterial preservative film, comprising the following steps:

[0027] 1) Preparation of chitosan solution: Disperse chitosan in an aqueous solution of acetic acid, then add polydiallyldimethylam...

Embodiment 2

[0032] The preparation method of the organic-inorganic hybrid nanomaterial is the same as that in Example 1.

[0033] Prepare chitosan / multilayer hybrid nanoparticle antibacterial preservative film, comprising the following steps:

[0034] 1) Preparation of chitosan solution: Disperse chitosan in an aqueous solution of acetic acid, then add polydiallyldimethylammonium chloride, heat and stir to dissolve to obtain chitosan solution;

[0035] 2) Add organic-inorganic hybrid nanomaterials to the chitosan solution, and disperse evenly (the organic-inorganic hybrid nanomaterials can be evenly dispersed at a speed of 200-300rpm, and there is no accumulation of nanoparticle materials after the stirring is stopped. ) after defoaming, then place the dispersion in a glass tank, cast and dry the film-forming precursor;

[0036] 3) Ultrasonicate the membrane precursor at low temperature for 3-5 minutes in a phosphate buffer solution with weakly acidic pH (pH=6.5-6.8), wash the membrane s...

Embodiment 3

[0039] The preparation method of the organic-inorganic hybrid nanomaterial is the same as that in Example 1.

[0040] Prepare chitosan / multilayer hybrid nanoparticle antibacterial preservative film, comprising the following steps:

[0041] 1) Preparation of chitosan solution: Disperse chitosan in an aqueous solution of acetic acid, then add polydiallyldimethylammonium chloride, heat and stir to dissolve to obtain chitosan solution;

[0042] 2) Add organic-inorganic hybrid nanomaterials to the chitosan solution, disperse evenly and defoam, then place the dispersion in a glass tank, cast and dry the film-forming precursor;

[0043] 3) Ultrasonicate the membrane precursor at low temperature for 3-5 minutes in a phosphate buffer solution with weakly acidic pH (pH=6.5-6.8), wash the membrane surface with phosphate buffer salt with purified water, then dry it and demold it to obtain chitosan Sugar / hybrid nanoparticle antibacterial cling film;

[0044] The concentration of chitosan...

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PUM

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Abstract

The invention belongs to the technical field of food package, and particularly relates to a method for preparing chitosan / multilayer hybrid nanoparticle antibacterial preservative film. The method comprises the steps of: adopting ceric oxide and phosphotungstic acid as raw materials, and performing hybridization between the raw materials and 2,2'-biimidazole to obtain nitrogen hybridized organic inorganic nanoparticles, and distributing the nanoparticles in a chitosan solution evenly so as to prepare the chitosan / multilayer hybrid nanoparticle antibacterial preservative film. According to themethod for preparing the chitosan / multilayer hybrid nanoparticle antibacterial preservative film, chitosan, phosphotungstic acid and ceric oxide are adopted as the antibacterial raw materials, a certain synergistic effect can be achieved through the three antibacterial raw materials, and the prepared film has the advantages of excellent antibacterial and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of food packaging, and in particular relates to a preparation method of a chitosan / multilayer hybrid nanoparticle antibacterial fresh-keeping film. Background technique [0002] Plastic wrap is a kind of plastic packaging product, usually made of ethylene as the masterbatch through polymerization reaction, mainly used in microwave oven food heating, refrigerator food preservation, fresh and cooked food packaging and other occasions, in family life, supermarkets, hotels and restaurants It is widely used in the field of industrial food packaging. According to the different materials used and the addition of plasticizers, plastic wrap is divided into various types, which can be applied to different occasions. Preservative film has been favored by people for its convenience, economy and attractive appearance. However, due to the general addition of plasticizers in the production process, the impact of plastic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L39/00C08K9/04C08K3/22C08K3/32C08J5/18
Inventor 余赞田璐钟文罗臻张勇军杜建军
Owner CHANGDE JINDE NEW MATERIAL TECH CO LTD
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