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A kind of graphene composite coating and preparation method thereof

A graphene composite, graphene technology, used in polyester coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of low bonding strength, inability to be widely used, opacity, etc. Chemical stability, good dispersibility and chemical stability, remarkable effect of energy saving

Active Publication Date: 2019-09-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are three main ways to solve the problem of glass heat insulation: one is to use heat insulation film; because heat insulation film is expensive, it is difficult to promote it in large quantities, and it can only be used on a small number of high-end cars
The second is to use heat reflective film; however, the existing heat reflective film products are opaque, making them unable to be widely used
The third is to use insulating glass made of metal materials such as silver plating on the glass surface; however, due to the huge equipment and investment of the insulating glass production line, it cannot be mass-produced and used
However, currently graphene is prone to agglomeration due to π-π conjugation and van der Waals adsorption
In addition, due to the unique structure of graphene, it is difficult to physically or chemically interact with other media, the bonding strength is not high, and the application field is limited.

Method used

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  • A kind of graphene composite coating and preparation method thereof
  • A kind of graphene composite coating and preparation method thereof
  • A kind of graphene composite coating and preparation method thereof

Examples

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Effect test

preparation example Construction

[0021] The embodiment of the present invention provides a kind of preparation method of graphene composite coating, it comprises the steps:

[0022] Step (1): The aniline oligomer derivative and the dispersion medium are mixed to obtain a mixture A. The aniline oligomer derivative has good solubility and can be dissolved in the dispersion medium. The aniline oligomer derivatives are used to modify the graphene. The aniline oligomer derivatives are aniline oligomers with functional groups, and the functional groups include carboxyl groups, alkyl groups, sulfonic acid groups, phosphoric acid groups, epoxy groups, polyethylene glycol groups and / or polyvinyl alcohol group. Preferably, the aniline oligomer is one or a combination of aniline trimer, aniline tetramer, aniline pentamer, aniline hexamer, aniline octamer.

[0023] The aniline oligomer or derivative thereof may have the following structural formula:

[0024]

[0025] (M is mainly sodium ion, potassium ion, quatern...

Embodiment 1

[0040] First, 10 g of aniline trimer and 80 g of deionized water were stirred and dispersed at a high speed of 1500 rad / min for 10 min to obtain mixture A. Add 10 g of single-layer graphene powder into the mixture A, continue high-speed stirring for 20 minutes and sonicate for 10 minutes to obtain a uniform and stable graphene dispersion.

[0041] Add 60g of silicone resin into a stirring container, then add 35g of the graphene dispersion under the condition of high-speed stirring at 1500rad / min, and stir evenly to obtain mixture B. Then add 2g ethylene glycol monobutyl ether, 2g lauryl sulfate, 0.5g modified mineral oil and 0.5g silicone oil to the mixture B, continue to stir for 10min and ultrasonically disperse for 30min, and filter through a 325-400 mesh screen , to obtain the graphene composite coating.

[0042] For the dispersion effect of the graphene dispersion, please refer to figure 1 . Depend on figure 1 It can be seen that the dispersion effect of the graphene ...

Embodiment 2

[0052] First, 9.9 g of aniline tetramer and 90 g of ethanol were dispersed under high-speed stirring at 1500 rad / min for 10 min to obtain mixture A. Then add 0.1 g of multi-layer graphene powder into the mixture A, continue to stir at high speed for 20 minutes and ultrasonically for 10 minutes to obtain a uniform and stable graphene dispersion.

[0053] Add 52g of acrylic resin into a stirring container, then add 45g of the graphene dispersion under the condition of high-speed stirring at 1500rad / min, and stir evenly to obtain a mixture B. Then add 1g of dipropylene glycol methyl ether ethyl ether ester, 1g of dodecylsulfonate, 0.5g of simethicone and 0.5g of hydroxymethyl cellulose to the mixture B, continue to stir for 10min and ultrasonically disperse for 30min, after 325-400 Mesh sieve filter treatment, namely obtain graphene composite coating.

[0054] For the dispersion effect of the graphene dispersion, please refer to figure 1 . Depend on figure 1 It can be seen th...

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Abstract

The invention provides a graphene composite coating, consisting a coating body, a graphene dispersion liquid and a coating additive. The graphene composite coating comprises 40-60 wt% of coating body, 30%-50% of graphene dispersion liquid and 3-10 wt% of coating additive. The graphene dispersion liquid comprises graphene, an aniline oligomer derivative and a disperse medium. The graphene and aniline oligomer derivative form a pi-pi bond, so as to uniformly disperse in the coating body. The invention also provides a preparation method of the graphene composite coating.

Description

technical field [0001] The invention relates to a transparent heat-insulating paint, in particular to a graphene-based graphene composite paint and a preparation method thereof. Background technique [0002] Under the situation of tightening global energy supply and deteriorating environment, energy conservation and emission reduction have become the common goal of all countries in the world. my country is a country with a large energy consumption. The total energy consumption of the society is equivalent to 1.5 billion tons of standard coal each year, of which about 30% is energy consumption of buildings. In modern buildings, glass accounts for an increasing proportion of exterior walls. It is estimated that heat transfer through glass windows accounts for 48% and 71% in winter and summer respectively. In the cold winter, people hope to obtain more direct solar radiation heat energy, and at the same time expect to reduce the leakage of indoor heat radiation, so that the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/61C09D183/04C09D133/00C09D167/00C09D175/04C09D167/08C09D163/00
Inventor 余海斌戴雷
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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