Preparation method for chitosan nanometer preservation coating film material

A technology of chitosan nano and chitosan, which is applied in the field of preparation of chitosan nano fresh-keeping coating materials, can solve the problems of uneven dispersion of nanoparticles, loss of nutrients, poor antibacterial effect, etc., and achieve simple process, Reduce the respiratory intensity and reduce the evaporation of water

Inactive Publication Date: 2015-12-23
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of chitosan nano-preservation coating material, to solve the relatively complex components of the existing nano-particle chitosan preservation c

Method used

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  • Preparation method for chitosan nanometer preservation coating film material
  • Preparation method for chitosan nanometer preservation coating film material
  • Preparation method for chitosan nanometer preservation coating film material

Examples

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Effect test

Embodiment 1

[0026] Dissolve 100mg carboxymethyl oleoyl chitosan in 100ml deionized water, stir for 30min, add 200mg chitosan quaternary ammonium salt (MW45KDa, DS85%) after dissolving, stir magnetically for 30min to fully dissolve, then add 2000mg chitosan Sugar quaternary ammonium salt (MW45KDa, DS85%), stirred evenly to obtain edible chitosan fresh-keeping coating solution.

Embodiment 2

[0028] Dissolve 100mg carboxymethyl oleoyl chitosan in 100ml deionized water, stir for 30min, add 200mg chitosan quaternary ammonium salt (MW45KDa, DS93%) after dissolving, stir magnetically for 30min to fully dissolve, then add 1000mg chitosan Sugar quaternary ammonium salt (MW45KDa, DS93%), stirred evenly to obtain edible chitosan fresh-keeping coating solution.

Embodiment 3

[0030] Dissolve 100mg carboxymethyl oleoyl chitosan in 100ml deionized water, stir for 30min, add 200mg chitosan quaternary ammonium salt (MW520KDa, DS93%) after dissolving, stir magnetically for 30min to fully dissolve, then add 1000mg chitosan Sugar quaternary ammonium salt (MW45KDa, DS85%), stirred evenly to obtain edible chitosan fresh-keeping coating solution.

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Abstract

The invention discloses a preparation method for a chitosan nanometer preservation coating film material. The preparation method comprises the following steps that 1, an amphiphilic chitosan derivative is dissolved in water, stirring is performed, a hydrophilic chitosan derivative is added, stirring is performed, and a nano-particle blending solution is obtained; 2, the hydrophilic chitosan derivative is added in the nano-particle blending solution again to enable the total mass percentage of the hydrophilic chitosan derivative in the solution to be 1-3%, the solution is stirred evenly, and then the chitosan nanometer preservation coating film material is obtained. The preparation method is simple and easy to operate, and the prepared material is compact and uniform in formed film structure, higher in watertightness and antibacterial activity and good in mechanical strength, has the effects of inhibiting air exchanging of fruits and vegetables and reducing the breathing intensity, water evaporation and direct infection of pathogenic bacteria on the fruits and vegetables and the like in fruit and vegetable preservation and can reduce nutrient ingredient loss and improve the preservation effect.

Description

technical field [0001] The invention relates to the technical field of food fresh-keeping coating materials, in particular to a preparation method of a chitosan nano-preservation coating material. Background technique [0002] Coating fresh-keeping refers to coating the surface of fruits and vegetables with a film-forming substance with a very thin film by spraying, dipping, brushing, etc., so as to inhibit the gas exchange of fruits and vegetables, reduce the breathing intensity, and reduce the water content. Evaporation reduces the direct infection of pathogenic bacteria to fruits and vegetables, better maintains the freshness and hardness of fruits and vegetables, achieves the fresh-keeping technology that delays the spoilage of fruits and vegetables, and keeps fruits and vegetables fresh. Because of its simplicity, convenience, low cost, good effect, and easy promotion, it has become a relatively active research field at home and abroad. [0003] Nanomaterials are widel...

Claims

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Application Information

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IPC IPC(8): A23L3/3508
CPCA23L3/3508
Inventor 李彦艳柳峰松张玉明
Owner HEBEI UNIVERSITY
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