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Graphene composite material membrane and preparation method thereof

A composite material film and graphene technology, applied in the field of graphene composite material film and its preparation, can solve the problems of poor barrier properties, unfavorable parallel curves, poor barrier properties, etc., and achieve good barrier properties, simple preparation process, and easy expansion. production effect

Inactive Publication Date: 2018-10-12
苏州傅里烨新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, the intermediate loss of the packaging film used in food and pharmaceutical packaging is as high as 30~50% due to poor barrier properties
Graphene has a large width-to-thickness ratio, and can improve the barrier properties of the composite film after being dispersed in the polymer material. However, the existing composite film is prone to shrinkage, which is not conducive to maintaining the original parallel curve, and the barrier property is poor. , cannot meet the demand

Method used

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Examples

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Effect test

preparation example Construction

[0022] The embodiment of the first aspect of the present invention provides a method for preparing a graphene composite film, the preparation method comprising the following steps:

[0023] S10, preparing graphene oxide colloidal suspension: adding graphene oxide and nano-titanium dioxide into deionized water, and ultrasonically dispersing evenly;

[0024] S20, preparing the graphene dispersion: irradiating the above graphene oxide colloidal suspension under an ultraviolet mercury lamp for 2-3 hours;

[0025] S30, add polyvinyl alcohol powder to the graphene dispersion liquid in step S20, after stirring until uniform, obtain graphene-polyvinyl alcohol composite liquid, coat above-mentioned graphene-polyvinyl alcohol composite liquid on the mould, dry and remove After molding, a graphene composite material film is obtained.

[0026] According to an optional implementation of the present invention, in step S10, 7-hydroxy-4-methylcoumarin is further added to the deionized water....

Embodiment 1

[0039] Preparation of graphene oxide colloidal suspension: Add 2 g of graphene oxide, 0.02 g of 7-hydroxy-4-methylcoumarin and 0.2 g of nano-titanium dioxide into deionized water, and disperse evenly by ultrasonication. The particle size of nano titanium dioxide is 50~900nm.

[0040] Preparation of graphene dispersion: irradiate the above-mentioned graphene oxide colloidal suspension under an ultraviolet mercury lamp for 2 hours;

[0041] Add 180g polyvinyl alcohol powder in above-mentioned graphene dispersion liquid, after stirring to evenly, obtain graphene-polyvinyl alcohol composite liquid, coat above-mentioned graphene-polyvinyl alcohol composite liquid on mold, after drying demoulding, obtain Graphene composite membrane. Specifically, the drying process includes: cooling and drying the mold coated with the graphene-polyvinyl alcohol composite liquid at a rate of 5°C / h between 35°C and 24h.

[0042] The above-mentioned preparation method of graphene oxide includes the s...

Embodiment 2

[0045] Preparation of graphene oxide colloidal suspension: add 4 g of graphene oxide, 0.4 g of 7-hydroxy-4-methylcoumarin and 0.8 g of nano-titanium dioxide into deionized water, and ultrasonically disperse evenly; further, add to deionized water. The average particle diameter of nano-titanium dioxide is 60nm.

[0046] Preparation of graphene dispersion: irradiate the above-mentioned graphene oxide colloidal suspension under an ultraviolet mercury lamp for 3 hours;

[0047] Add 440g polyvinyl alcohol powder in above-mentioned graphene dispersion liquid, after stirring to evenly, obtain graphene-polyvinyl alcohol composite liquid, be coated with above-mentioned graphene-polyvinyl alcohol composite liquid on mold, after drying demoulding, obtain Graphene composite membrane. Specifically, the drying process includes: cooling and drying the mold coated with the graphene-polyvinyl alcohol composite liquid at a rate of 5°C / h between 80°C and 24h.

[0048] The above-mentioned prepa...

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Abstract

The invention discloses a graphene composite material membrane and a preparation method thereof. The preparation method includes the following steps that S10,graphene oxide colloid suspension liquid is prepared,wherein graphene oxide and nanometer titania are added into deionized water,and the mixture is subjected to even ultrasonic dispersion; S20,graphene dispersion liquid is prepared,wherein the graphene oxide colloid suspension liquid is irradiated for 2-3 h under an ultraviolet mercury lamp; S30,polyvinyl alcohol powder is added into the graphene dispersion liquid in the step S20,the mixture is stirred evenly,then graphene-polyvinyl alcohol complex liquid is obtained,a mold is smeared with the graphene-polyvinyl alcohol complex liquid,and finally the graphene composite material membrane is obtained after drying and mold release. In the embodiment of the preparation method of the graphene composite material membrane,the oxygen-permeable coefficient of the graphene composite material membrane is lowered by 99% to the highest degree,the barrier property is good,and package requirements of kinds of foods,medicine and other products can be met. According to the preparation technology,the embodiment of the graphene composite material membrane is simple,and production is convenient to expand.

Description

technical field [0001] The invention relates to the technical field of graphene composite materials, more specifically, the invention relates to a graphene composite material film and a preparation method thereof. Background technique [0002] Generally, the intermediate loss of packaging films used in food and pharmaceutical packaging is as high as 30-50% due to poor barrier properties. Graphene has a large width-to-thickness ratio, and can improve the barrier properties of the composite film after being dispersed in the polymer material. However, the existing composite film is prone to shrinkage, which is not conducive to maintaining the original parallel curve, and the barrier property is poor. , cannot meet the demand. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a graphene composite film and a preparation method thereof. [0004] To achieve the above object, the present invention adopts the fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L29/04C08K3/04C08K3/22C08K5/1545
CPCC08J5/18C08J2329/04C08K3/042C08K5/1545C08K2003/2241C08K2201/011
Inventor 王华涛
Owner 苏州傅里烨新材料科技有限公司
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