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Preparation method of graphene-composited anticorrosive coating

A technology of composite graphene and anti-corrosion coatings, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as poor mechanical properties, many defects, and scratch resistance, and achieve low cost, simple method, and high application wide range of effects

Inactive Publication Date: 2015-12-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, most of the current polymer anti-corrosion coatings use epoxy resin as a film-forming substance, but epoxy resin also has its own defects, and any coating will have some holes and defects in the coating, which cannot completely prevent metal corrosion
At the same time, most household paints use silicon-acrylic emulsion as the film-forming material. Silicon-acrylic emulsion has the characteristics of good gloss, alkali resistance, acid resistance and anti-fouling, etc., but it also has many defects, such as poor mechanical properties and scratch resistance.

Method used

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  • Preparation method of graphene-composited anticorrosive coating
  • Preparation method of graphene-composited anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.027g of reduced graphene oxide (rGO) prepared by the hydrothermal method, put it in a 25mL beaker, add 5mL of toluene and 5mL of n-butanol, dissolve and ultrasonicate for 4h until the graphene is uniformly dispersed in the solution, After standing for a short period of time without precipitation, it is configured as a graphene dispersion.

[0020] Weigh 2.882g of epoxy resin, put it in a 50mL beaker, add 4mL of toluene and 4mL of n-butanol, stir the mixed solution until the epoxy resin dissolves evenly, add the graphene dispersion, stir vigorously for 15min, make the solution mix evenly, and then Continue to stir, add 0.2g of diethylenetriamine under stirring to make the curing agent mix evenly, put the solution in a vacuum oven at a constant temperature of 80°C, adjust the coating to a certain viscosity, and prepare a graphene / epoxy resin composite anticorrosion Paint, and then use a desktop glue coater to evenly coat the paint on the tinplate slices.

Embodiment 2

[0022] Weigh 0.025g of reduced graphene oxide (rGO) prepared by hydrothermal method, put it in a 25mL beaker, add 8mL of dimethyl sulfoxide, dissolve and sonicate for 4h until the graphene is uniformly dispersed in the solution, short Standing for a period of time without precipitation. The configuration of the graphene dispersion is completed.

[0023] Weigh 5.649g of silicon-acrylic emulsion, place it in a 50mL beaker, add 4mL of dimethyl sulfoxide, stir the mixed solution until the silicon-acrylic emulsion is evenly dissolved, add the prepared graphene dispersion, stir for 15min, and mix the solution evenly, Then continue to stir, add 0.5g lauryl alcohol ester under stirring state, make the film-forming aid mix evenly, put the solution into a vacuum oven at a constant temperature of 80°C, adjust the coating to a certain viscosity, and prepare graphene / silicone acrylic acid Emulsion compound anti-corrosion coating, and then use a desktop glue coater to evenly coat the coati...

Embodiment 3

[0025] Weigh 0.0515g of graphene oxide, dissolve it in 20mL of deionized water, and ultrasonically obtain an aqueous dispersion of graphene oxide for 2 hours, then add 0.0533g of polyvinylpyrrolidone (PVP) and 1mL of hydrazine hydrate, and place at 80°C The modified PVP-rGO was prepared in a water bath for 4 hours. Then mix the prepared PVP-rGO with epoxy resin (or silicone acrylic emulsion), ultrasonically and stir until the solution is completely dissolved, add the curing agent diethylenetriamine (or lauryl alcohol ester), and then put the solution at 80°C In a vacuum oven at a constant temperature, the coating is heated and adjusted to a certain viscosity to obtain a modified graphene / epoxy resin composite anti-corrosion coating.

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Abstract

The invention discloses a preparation method of a graphene-composited anticorrosive coating. The preparation method comprises the steps that a solution interaction method is adopted to mix and stir a graphene dispersion solution and a basic casing (epoxy resin or silicone acrylic emulsion), a curing agent, a coalescing agent and the like are added and are stirred and mixed evenly, vacuum defoamation is performed, the viscosity is regulated to obtain the graphene-composited anticorrosive coating. The preparation method is simple, convenient and quick to implement, lower in cost and wide in application range.

Description

technical field [0001] The invention relates to a method for preparing an anticorrosion coating compounded with graphene, in particular to compounding graphene and a matrix coating by using a solution intercalation method. Background technique [0002] In recent years, metal corrosion has increasingly become an economic problem that countries around the world pay attention to. According to statistics, metal equipment discarded due to corrosion accounts for 30% of its output every year in the world, and 10% of steel cannot be recycled due to corrosion. The research of G2MTLabs (Generation2MaterialsTechnologyLabs) in the United States shows that in 2012, the economic loss caused by corrosion in the entire United States exceeded 100 billion US dollars for the first time, accounting for 6.2% of its annual GDP. The economic losses caused by corrosion of water, waste gas, underground pipelines, highways, marine ships, etc. in my country every year also reach tens of billions, acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/04C09D7/12C09D5/08
Inventor 赵崇军师帅钱秀珍
Owner EAST CHINA UNIV OF SCI & TECH