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Preparation method of microporous polyethylene mildew-proof preservative film

A technology of microporous polyethylene and plastic wrap, applied in the field of environmental protection materials, can solve the problems of poor air permeability and moisture permeability, poor stability of microporous polyethylene film, etc., achieve high air permeability, reduce carbon dioxide damage, and improve moisture resistance performance Effect

Inactive Publication Date: 2018-10-30
FOSHAN WANYANG BIOLOGICAL TECH CO LTD
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Problems solved by technology

[0003] Technical problem to be solved by the present invention: Aiming at the problems of poor stability, poor gas permeability and moisture permeability of microporous polyethylene film, a preparation method of microporous polyethylene anti-mildew preservative film is provided

Method used

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  • Preparation method of microporous polyethylene mildew-proof preservative film

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Embodiment Construction

[0016] Use 0.2mol / L acetic acid solution to prepare chitosan-acetic acid solution with a mass fraction of 0.5% to 0.7%; weigh 20 to 30 parts of chitosan-acetic acid solution and 10 to 15 parts of 0.05mol / L silver nitrate solution, 3~5 parts of 0.2mol / L sodium borohydride solution, 5~10 parts of nano-TiO 2 , 5-10 parts of nano-SiO 2 , add silver nitrate solution to the chitosan-acetic acid solution, stir magnetically for 15-20 minutes, add sodium borohydride solution at a speed of 800r / min, the solution is light yellow at this time, stop stirring after 1h, add nano-TiO 2 and nano-SiO 2 and stir evenly to obtain composite nanomaterials; in parts by weight, respectively weigh 40 to 50 parts of PVA solution, 1 to 3 parts of composite nanomaterials, 1 to 2 parts of borax solution, and 3 to 5 parts of ammonium carbonate. Add composite nanomaterials and ammonium carbonate into the solution, stir magnetically for 15-20 minutes, and then ultrasonically sound for 10-15 minutes to obt...

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Abstract

The invention relates to a preparation method of a microporous polyethylene mildew-proof preservative film, and belongs to the technical field of environment-friendly materials. A chemical reduction method is applied to prepare a chitosan nano-silver solution, taking the sodium borohydride as a reducing agent and chitosan as a stabilizing agent. A large amount of hydroxyl groups and amino groups on molecular chains of the chitosan can react with nano-silver to stabilize the nano-silver solution. Nano-TiO2 and nano-SiO2 are added into the chitosan nano-silver solution to prepare a composite nanomaterial. Through contact reaction of the nano-silver, water resistance of the nano-SiO2 and photocatalytic reaction of the Nano-TiO2, inherent ingredient respiratory systems and material transfer systems of pathogenic microorganisms are damaged, reproduction of the pathogenic microorganisms are disabled to promote cell death, and accordingly, bacteria resistance, freshness retaining and moistureresistance are realized. The prepared microporous polyethylene mildew-proof preservative film has high moisture-penetrability, high barrier property, and excellent application and market prospect.

Description

technical field [0001] The invention relates to a preparation method of a microporous polyethylene anti-mildew preservation film, which belongs to the technical field of environmental protection materials. Background technique [0002] Plastic film is currently the most widely used packaging material for fresh fruits and vegetables. It is transparent and can be used to see the condition of the packaged products at a glance; it moisturizes and can reduce the moisture loss of the product and freshness; it is breathable and can play a role in spontaneous air conditioning. It can prolong the preservation time; its airtightness can protect the product from pollution; and its low price also makes its application prospect very broad. Although the traditional film can play the role of packaging and has a certain fresh-keeping effect, it obviously cannot meet the fresh-keeping needs of the modern market. Especially in China, as a large fruit and vegetable producing country, the resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L5/08C08K3/00C08K3/08C08K3/38C08K3/22C08K3/36C08J5/18C08J3/24
CPCC08J5/18C08J3/246C08J2329/04C08J2405/08C08K3/00C08K3/36C08K2003/0806C08K2003/2241C08K2201/011
Inventor 刘茂龙张鑫李静
Owner FOSHAN WANYANG BIOLOGICAL TECH CO LTD
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