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Degradable antibacterial preservation material and preparation method thereof

A fresh-keeping material, nano-zinc oxide technology, applied in the field of fresh-keeping materials, can solve the problems of antibacterial and fresh-keeping performance not meeting the fresh-keeping requirements, and achieve the effect of improving anti-bacterial and fresh-keeping functions, reducing moisture permeability, and changing the penetration path

Inactive Publication Date: 2016-07-13
SUZHOU DINGLI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyvinyl alcohol (PVA) is easy to form a film and degrade, and has good hygiene and safety, so it is widely used in food packaging, but its hydrophilic property makes it have higher moisture permeability after film formation, which affects its application effect on food packaging; research PVA and other materials blending and cross-linking composite and functional nano-material modification new technology, the development of new polyvinyl alcohol-based coating film fresh-keeping packaging materials is the direction of technological innovation and development in this field
Invention patent ZL200910027113.X "New material and preparation process of polyvinyl alcohol-based coating film fresh-keeping packaging", using glutaraldehyde as the cross-linking agent for the binary matrix of polyvinyl alcohol and stearic acid, the obtained new polyvinyl alcohol-based coating film packaging Although the material can significantly reduce the water vapor transmission rate after the material is formed into a film, there are still many problems in commercial application; the patent ZL200810155224.4 "Preservation method for traditional poultry and egg products with composite nanomaterial coating film" uses SiO 2 The above-mentioned new polyvinyl alcohol-based coating film packaging materials are further modified, and its moisture permeability and other performance indicators have been further improved, but the antibacterial and fresh-keeping performance still does not meet the long-term circulation quality fresh-keeping requirements of some foods

Method used

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  • Degradable antibacterial preservation material and preparation method thereof

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Embodiment 1

[0017] A degradable antibacterial and fresh-keeping material, comprising the following components in parts by weight: 100 parts of polyvinyl alcohol, 5 parts of nano-zinc oxide, 3 parts of silicon dioxide, 40 parts of polycarbonate, 15 parts of stearic acid, pentadiene 80 parts of aldehyde, 120 parts of ethanol, wherein, the average particle diameter of nanometer zinc oxide is 20±2nm, and the average particle diameter of silicon dioxide is 40±3nm.

[0018] The preparation method of described degradable antibacterial fresh-keeping material, comprises the following steps:

[0019] (1) Weigh each component according to the weight ratio, and set aside;

[0020] (2) Add polyvinyl alcohol, nano-zinc oxide, silicon dioxide, and ethanol into the reaction kettle, stir and mix for 60 minutes, and then ultrasonicate for 20 minutes under 60W;

[0021] (3) Add polycarbonate, stearic acid and glutaraldehyde into the reaction kettle, stir and react for 4 hours at 60°C, and after the reactio...

Embodiment 2

[0023] A degradable antibacterial fresh-keeping material, comprising the following components in parts by weight: 100 parts of polyvinyl alcohol, 0.5 parts of nano-zinc oxide, 0.2 parts of silicon dioxide, 20 parts of polycarbonate, 5 parts of stearic acid, pentadiene 50 parts of aldehyde, 60 parts of ethanol, wherein, the average particle diameter of nano zinc oxide is 20±2nm, and the average particle diameter of silicon dioxide is 40±3nm.

[0024] The preparation method of described degradable antibacterial fresh-keeping material, comprises the following steps:

[0025] (1) Weigh each component according to the weight ratio, and set aside;

[0026] (2) Add polyvinyl alcohol, nano-zinc oxide, silicon dioxide, and ethanol into the reaction kettle, stir and mix for 30 minutes, and then ultrasonicate for 15 minutes at 60W;

[0027] (3) Add polycarbonate, stearic acid and glutaraldehyde into the reaction kettle, stir and react at 100°C for 6 hours, and after the reaction, cool t...

Embodiment 3

[0029] A degradable antibacterial and fresh-keeping material, comprising the following components in parts by weight: 100 parts of polyvinyl alcohol, 1.5 parts of nano-zinc oxide, 0.8 parts of silicon dioxide, 30 parts of polycarbonate, 8 parts of stearic acid, pentadiene 65 parts of aldehyde, 100 parts of ethanol, wherein, the average particle diameter of nano zinc oxide is 20±2nm, and the average particle diameter of silicon dioxide is 40±3nm.

[0030] The preparation method of described degradable antibacterial fresh-keeping material, comprises the following steps:

[0031] (1) Weigh each component according to the weight ratio, and set aside;

[0032] (2) Add polyvinyl alcohol, nano-zinc oxide, silicon dioxide, and ethanol into the reaction kettle, stir and mix for 40 minutes, and then ultrasonicate for 16 minutes under 60W;

[0033] (3) Add polycarbonate, stearic acid and glutaraldehyde into the reaction kettle, stir and react for 4.5 hours at 80°C, and after the reactio...

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Abstract

The invention discloses a degradable antibacterial preservation material and a preparation method thereof. The degradable antibacterial preservation material comprises polyvinyl alcohol, nano-zinc aoxide, silica, polycarbonate, stearic acid, glutaraldehyde and ethanol. The preparation method comprises the steps of firstly uniformly mixing polyvinyl alcohol, nano-zinc aoxide, silica and ethanol by virtue of stirring and ultrasound, then adding polycarbonate, stearic acid and glutaraldehyde, heating, and carrying out reaction under stirring, so as to obtain the degradable antibacterial preservation material. According to the preparation method, a polyvinyl alcohol-based composite preservation material is modified by virtue of nano-zinc aoxide and silica, so that the film-forming moisture permeability of a new material is remarkably decreased, and the antibacterial preservation performance of a packaging material is remarkably improved.

Description

technical field [0001] The invention relates to the field of fresh-keeping materials, in particular to an antibacterial fresh-keeping material and a preparation method thereof. Background technique [0002] At present, most of the food packaging materials used in my country's market are plastic products, such as polyethylene (PE), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), polylactic acid (PLA) and nylon. Under certain medium environment and temperature conditions, some harmful substances will dissolve out of these materials and transfer to food in a very small amount, thus causing potential harm to human health. In addition, most of these plastic products come from non-renewable petroleum resources and are difficult to degrade. After being discarded, they will seriously damage the ecological environment and cause white pollution. Therefore, people began to develop new degradable packaging materials based on renewable resources in order to extend the shelf life of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L69/00C08K13/02C08K3/22C08K3/36C08K5/09C08K5/07
CPCC08L29/04C08K2201/003C08K2201/011C08L2201/06C08L2203/16
Inventor 顾建芳
Owner SUZHOU DINGLI PACKAGING
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