Graphene oxide modified aqueous acrylic acid functional coating and preparation method thereof

A water-based acrylic and graphene modification technology, applied in the direction of anti-corrosion coatings, etc., can solve the problems that water-based acrylic coatings cannot achieve corrosion resistance, and achieve the effect of improving anti-corrosion performance and improving overall performance

Inactive Publication Date: 2018-04-06
FOSHAN UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, water-based acrylic coatings have the advantages of environmental friendliness, good comprehensive performance, and a wide range of applications. However, in some special occasions, water-based acrylic coatings cannot meet the requirements of high corrosion resistance, which limits their application in such occasions.

Method used

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  • Graphene oxide modified aqueous acrylic acid functional coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of functionalized graphene dispersion:

[0032] 1) Weigh a certain amount of graphene oxide, add it to a beaker, and then add an appropriate amount of distilled water to prepare a graphene oxide aqueous dispersion with a concentration of 0.05g / ml, and then ultrasonically disperse the graphene oxide aqueous dispersion for 60 minutes;

[0033] 2) Weigh 40ml of graphene oxide aqueous dispersion and heat it to 60°C, add 30ml of polyethylene glycol dropwise to the graphene oxide aqueous dispersion, stir and react for 2 hours while maintaining a constant temperature of 60°C to obtain functionalized graphene dispersion liquid.

[0034] 2. Preparation of water-based acrylic emulsion:

[0035] 1) Add 10g of water, 2g of emulsifier (sodium lauryl sulfate), 25g of butyl acrylate, 5g of methacrylamide, 5g of vinyl acetate and 5g of styrene into the reaction vessel and stir for 30min to obtain a stable pre-emulsion ;

[0036] 2) Add 20g of water and 1g of emulsifie...

Embodiment 2

[0045] Embodiment two: adopt the method step and proportioning that are basically the same as embodiment one, the difference between the two is: in the step S1 of preparing graphene oxide modified water-based acrylic functional coating, the functionalized graphene dispersion liquid of 10ml is Add it dropwise to 50ml of water-based acrylic emulsion, and stir at a speed of 1000-1500rpm for 10-20min to disperse it evenly to obtain a PEG-GO / acrylic emulsion mixture.

Embodiment 3

[0046] Embodiment three: adopt the method step and proportioning that are basically the same as embodiment one, the difference between the two is: in the step S1 of preparing graphene oxide modified water-based acrylic functional coating, the functionalized graphene dispersion liquid of 15ml is Add it dropwise to 50ml of water-based acrylic emulsion, and stir at a speed of 1000-1500rpm for 10-20min to disperse it evenly to obtain a PEG-GO / acrylic emulsion mixture.

[0047]Utilize the electrochemical AC impedance test results of the coating to evaluate the anticorrosion properties of the coating films of Examples 1 to 3: first, dry the prepared coating, soak it in 3.5% NaCl solution for 24h, and carry out the AC impedance test , the obtained AC impedance data is fitted with the ZView impedance analysis software; finally, the measured data is drawn into a graph (ie: Bode graph) with the origin software. In the Bode graph, the impedance of the coating in the high-frequency region ...

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Abstract

The invention relates to the technical field of functional coatings, and in particular relates to a graphene oxide modified aqueous acrylic acid functional coating and a preparation method thereof. The coating is prepared from the following components in parts by weight: 5-15 parts of a functionalized graphene dispersion liquid, 20-45 parts of an aqueous acrylic emulsion, 5-25 parts of pigments and filler, 1-5 parts of a dispersant, 1-5 parts of a defoamer, 5-25 parts of water and 1-5 parts of a PH regulator. By compounding resin and functionalized graphene oxide physically to modify the aqueous acrylic coating, the corrosion resistance of the aqueous acrylic coating is enhanced effectively. In addition, by adding methacrylamide and vinyl acetate functional modifying monomers, phenyl, amide bases and ester groups are introduced to the acrylic resin, so that the performance of the acrylic emulsion is promoted.

Description

technical field [0001] The invention relates to the technical field of functional coatings, in particular to a graphene oxide modified water-based acrylic functional coating and a preparation method thereof. Background technique [0002] As we all know, graphene is a benzene ring structure material in which carbon atoms are closely arranged in two-dimensional space. Its unique crystal structure endows graphene with special physical and chemical properties, making it have great application potential in the field of materials, especially its excellent Excellent anti-corrosion performance, that is: 1. The conjugated structure of graphene sheets can make it superimposed layer by layer to form a dense insulating layer, inhibiting the infiltration and penetration of water on the coating film, and playing a physical anti-corrosion effect; 2. The conductivity of graphene The performance enables it to quickly conduct the electrons lost by Fe in the anode reaction to the surface of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D5/08C08F220/18C08F220/56C08F212/08C08F2/26
CPCC08F2/26C08F220/18C08F220/1804C08K3/04C08K9/08C09D5/08C09D133/08C08F220/56C08F212/08
Inventor 叶秀芳陈东初黄晓燕常萌蕾
Owner FOSHAN UNIVERSITY
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