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Self-assembled graphene composite material, and preparation method and application thereof

A composite material and graphene technology, applied in the direction of coating, etc., can solve the problems of not meeting the barrier requirements of small gas molecules, limited improvement of barrier performance, and many composite materials, so as to achieve excellent gas barrier performance, improve barrier performance, and wide application foreground effect

Inactive Publication Date: 2016-08-17
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the above-mentioned preparation method adopts the traditional blend coating method, which is difficult to realize the regular distribution of graphene two-dimensional materials on the substrate, resulting in many local defects in the obtained composite material, limited improvement in barrier performance, and cannot meet the requirements of gas Small Molecule Barrier Requirements

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  • Self-assembled graphene composite material, and preparation method and application thereof

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Embodiment 1

[0044] The self-assembled graphene composite material of this embodiment is prepared by the following method:

[0045] 1) Material preparation:

[0046] Disperse 0.1 g of graphene oxide (GO) in water, and ultrasonicate for 30 minutes to obtain a graphene oxide dispersion with a concentration of 1 mg / ml;

[0047] Under magnetic stirring, add 100ml of graphene oxide dispersion to 100ml of polystyrene sodium sulfonate (PSS) solution with a concentration of 3mg / ml (the mass ratio of graphene oxide to polystyrene sodium sulfonate is 1:3), after stirring for 30 minutes for mixing, warm up to 95°C, add 1ml of hydrazine hydrate (1ml of hydrazine hydrate is added for every 0.1g of graphene oxide), after 8 hours of reaction, filter through membrane to remove unreacted PSS, get PSS modified graphene, dispersed in water to obtain a PSS-RGO dispersion with a concentration of 0.5 mg / ml and pH=3;

[0048] Under magnetic stirring, add 100ml of graphene oxide dispersion to 100ml of polyethyleneimine ...

Embodiment 2

[0053] The self-assembled graphene composite material of this embodiment is prepared by the following method:

[0054] The graphene composite material with one layer of barrier coating obtained in Example 1 was repeatedly immersed in the PSS-RGO dispersion (concentration of 0.5mg / ml, pH=3), deionized water, and PEI-RGO dispersion (concentration of 0.5mg / ml, pH=9), the operation in deionized water, the immersion time is 10 minutes each time, and the operation is repeated 9 times to obtain a graphene composite material with 10 barrier coatings.

[0055] The obtained graphene composite material with 10-layer barrier coating is recorded as (PSS-RGO / PEI-RGO) 10 .

Embodiment 3

[0057] The self-assembled graphene composite material of this embodiment is prepared by the following method:

[0058] The graphene composite material with one layer of barrier coating obtained in Example 1 was repeatedly immersed in the PSS-RGO dispersion (concentration of 0.5mg / ml, pH=3), deionized water, and PEI-RGO dispersion (concentration of 0.5mg / ml, pH=9), the operation in deionized water, the immersion time is 10 minutes each time, and the operation is repeated 19 times to obtain a graphene composite material with 20 layers of barrier coatings.

[0059] The obtained graphene composite material with 20 layers of barrier coating is recorded as (PSS-RGO / PEI-RGO) 20 .

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Abstract

The invention discloses a self-assembled graphene composite material, and a preparation method and an application thereof. The preparation method of the composite material comprises the following steps: 1, mixing a graphene oxide dispersion with a poly(sodium 4-styrenesulfonate) solution, heating the obtained solution mixture, adding hydrazine hydrate, carrying out a reaction, filtering the obtained reaction product, dispersing the filtered product in water to obtain a PSS-RGO dispersion, mixing the graphene oxide dispersion with a polyethyleneimine solution, heating and reacting, filtering, dispersing the obtained filtered product in water to obtain a PEI-RGO dispersion, taking a PET matrix, carrying out corona activation and secondary activation on the PET matrix to obtain an activated matrix; and 2, self-assembling: sequentially immersing the activated matrix in the PSS-RGO dispersion, a washing liquid, the PEI-RGO dispersion and the washing liquid, and taking out the obtained material to obtain the composite material. The composite material realizes structured distribution of graphene on the PET matrix, so the barrier performance of the composite material is improved; and a graphene barrier coating has no influences on the optical or mechanical performances of the matrix material, and has good application prospect in the fields of packaging, medicines and electronic display.

Description

Technical field [0001] The invention belongs to the technical field of barrier materials, and specifically relates to a self-assembled graphene composite material, and also relates to a preparation method of the self-assembled graphene composite material and the application of the self-assembled graphene composite material as a gas barrier material. Background technique [0002] With the development of modern industry, the requirements for barrier materials are getting higher and higher. For example, packaging materials need to reduce the penetration of oxygen; in the electronic display industry, it is necessary to increase the barrier to water vapor; similarly, in the field of medicine, it is also necessary to isolate the pollution of drugs by oxygen and water vapor. Therefore, improving the gas barrier properties of polymer materials is of great significance not only in the packaging industry, but also in the fields of medicine and electronic display. In the prior art, one way...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/12C08L67/02C09D179/02C09D125/18C09D7/12
CPCC08J7/04C08J7/0427C08J7/12C08J2367/02C08J2425/18C08J2479/02C08K3/04C09D7/61C09D125/18C09D179/02C08L25/18C08L79/02
Inventor 刘红宇张思翰刘俊骐王新胜马军营牛青山
Owner HENAN UNIV OF SCI & TECH
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