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Straw cellulose antibacterial fresh-keeping film and preparation method thereof

A technology of straw cellulose and fresh-keeping film, which is applied in the field of fresh-keeping, can solve problems affecting food safety and sanitation, poor air flow, high environmental humidity, etc., and achieve good mechanical properties, simple process, and the effect of environmental degradation

Active Publication Date: 2018-11-20
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when food is packaged with ordinary plastic wrap, the air flow inside the package is poor and the ambient humidity is high. The plastic wrap and the food space become an independent environmental system, which is more likely to cause the growth and reproduction of bacteria and microorganisms, and cause the packaged food to deteriorate. affect food safety and sanitation

Method used

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  • Straw cellulose antibacterial fresh-keeping film and preparation method thereof
  • Straw cellulose antibacterial fresh-keeping film and preparation method thereof
  • Straw cellulose antibacterial fresh-keeping film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A straw cellulose antibacterial fresh-keeping film prepared from microcrystalline cellulose obtained from plant straws, the antibacterial fresh-keeping film contains a certain quality of antibacterial agent, and the antibacterial agent is dandelion extract or tea polyphenol one or a combination of two.

Embodiment 2

[0048] A straw cellulose antibacterial fresh-keeping film is prepared from microcrystalline cellulose obtained from plant straws, and the antibacterial fresh-keeping film contains an antibacterial agent with a mass of 10-30% of the raw material microcrystalline cellulose, and the antibacterial agent is One or a combination of dandelion extract or tea polyphenols.

Embodiment 3

[0050] A preparation method of straw cellulose antibacterial fresh-keeping film, the steps are as follows:

[0051] Step 1, preparing straw cellulose:

[0052] Remove the leaves of the plant straw, cut into sections, wash and heat-treat in boiling water for 1 hour, dry and crush the heat-treated straw to 40 meshes to obtain straw powder; mix the straw powder with NaOH solution according to a certain solid-liquid ratio and mix under certain conditions Complete the alkalization treatment, after centrifugation, wash the first centrifugal sediment to neutrality and mix it with sodium chlorite solution according to a certain solid-liquid ratio, adjust the pH to 4.0, complete the decolorization and impurity removal treatment at a certain temperature and centrifuge, and the second The centrifuged sediment was washed to neutrality and dried and pulverized to obtain straw cellulose;

[0053] Step 2, preparing microcrystalline cellulose:

[0054] mixing the straw cellulose obtained in...

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Abstract

The invention belongs to the technical field of fresh-keeping and in particular relates to a straw cellulose antibacterial fresh-keeping film and a preparation method thereof. The antibacterial fresh-keeping film takes microcrystalline cellulose prepared from plant straws as a raw material and contains an antibacterial agent which accounts for 10-30% by mass of the microcrystalline cellulose. Theantibacterial agent is one of or combination of dandelion extract or tea polyphenol. The preparation method comprises the following steps: firstly, extracting cellulose from the plant straws to prepare the microcrystalline cellulose; then mixing a safe and green imidazole chlorine salt ionic liquid as a solvent with the microcrystalline cellulose to prepare a casting film liquid; then coating thecasting film liquid to a glass panel to prepare a wet film; separating out and eluting the imidazole chlorine salt ionic liquid in the wet film in deionized water; and drying the wet film to prepare the straw cellulose antibacterial fresh-keeping film. The straw cellulose antibacterial fresh-keeping film provided by the invention has good mechanical properties, permeable and ventilating propertiesand antibacterial property and can prevent bacteria breeding effectively in the food fresh-keeping process, so that the fresh-keeping period is prolonged. The raw material is safe, non-toxic and green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping, and in particular relates to a straw cellulose antibacterial fresh-keeping film and a preparation method thereof. Background technique [0002] Ordinary cling film is mostly processed from petrochemical raw materials such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), which are more common in people's daily life. The large-scale industrial production technology is relatively mature, and has Excellent barrier and mechanical properties. However, it causes great pollution to the environment, and petroleum is a non-renewable energy source, which does not meet the needs of today's green development. Most ordinary plastic wraps add a lot of plasticizers or produce toxic substances after heating, which will migrate to the wrapped fruit. , endangering people's health. [0003] my country is a big agricultural country, the annual output of straw is higher than 700 million tons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K5/00C08J5/18
CPCC08J5/18C08J2301/02C08K5/0058Y02P20/54
Inventor 张群利崔琳琳邬泽凯仙鸽翟薇丽
Owner NORTHEAST FORESTRY UNIVERSITY
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