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Preparation method of polyaniline water-based epoxy resin anticorrosive paint

A water-based epoxy resin, anti-corrosion coating technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings and other directions, can solve the problems of reduced water resistance and anti-corrosion performance of coatings, large specific surface area, etc., to achieve the effect of no pollution to the environment

Inactive Publication Date: 2016-09-21
郭迎庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the problem that the water-based epoxy resin coating uses water as the solvent and there are a large number of hydrophilic groups, which reduces the water resistance and anti-corrosion performance of the coating, the present invention provides a polyaniline water-based epoxy coating The preparation method of epoxy resin anticorrosion coating, the present invention utilizes the characteristic that graphene has large specific surface area, adopts polymerization-reduction method to prepare polyaniline / graphene composite material with large specific surface area and good dispersion, and this composite material is combined with water-based epoxy Preparation of anti-corrosion coating by resin blending

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Weigh 0.5g of graphene oxide and disperse it in 1L of water, and obtain a stable brown graphene oxide suspension after ultrasonication for 2 hours; measure 1mL of aniline and dissolve it in 500mL of 0.2 mol / L hydrochloric acid solution, stir magnetically, and prepare aniline / hydrochloric acid solution , and then added to the above graphene oxide suspension, magnetically stirred in an ice-water bath for 1.0h to obtain a stable graphene oxide / aniline / hydrochloric acid mixture; weigh 3g of ammonium persulfate and dissolve it in 100mL of 0.2mol / L hydrochloric acid solution , added to the above-mentioned graphene oxide / aniline / hydrochloric acid mixed solution, and at the same time, magnetically stirred and reacted for 12 hours under an ice-water bath, and filtered after standing for 10 hours to obtain a filter residue, which was washed with absolute ethanol and deionized water in sequence until the eluent was Colorless; weigh 1g of the filter residue washed with absolute etha...

example 2

[0022] Weigh 1.5g of graphene oxide and disperse it in 1L of water, and obtain a stable brown graphene oxide suspension after ultrasonication for 2 hours; measure 1.5mL of aniline and dissolve it in 500mL of 0.2 mol / L hydrochloric acid solution, stir magnetically, and prepare aniline / hydrochloric acid solution, and then added to the above graphene oxide suspension, magnetically stirred in an ice-water bath for 1.2h to obtain a stable graphene oxide / aniline / hydrochloric acid mixture; weigh 4g ammonium persulfate and dissolve it in 100mL 0.2mol / L hydrochloric acid solution, added to the above-mentioned graphene oxide / aniline / hydrochloric acid mixed solution, and magnetically stirred in an ice-water bath for 18 hours at the same time, and filtered after standing for 11 hours to obtain a filter residue, which was washed with absolute ethanol and deionized water to the eluent It is colorless; weigh 1.5 g of the filter residue washed with absolute ethanol and deionized water, put it ...

example 3

[0025]Weigh 2.0g of graphene oxide and disperse it in 1L of water, and obtain a stable brown graphene oxide suspension after ultrasonication for 2 hours; measure 2mL of aniline and dissolve it in 500mL of 0.2 mol / L hydrochloric acid solution, stir magnetically, and prepare aniline / hydrochloric acid solution , and then added to the above graphene oxide suspension, magnetically stirred in an ice-water bath for 1.5h to obtain a stable graphene oxide / aniline / hydrochloric acid mixture; weigh 6g of ammonium persulfate and dissolve it in 100mL 0.2mol / L hydrochloric acid solution , added to the above-mentioned graphene oxide / aniline / hydrochloric acid mixed solution, and at the same time, magnetically stirred and reacted for 24 hours under an ice-water bath, and filtered after standing for 12 hours to obtain a filter residue, which was washed with absolute ethanol and deionized water in sequence until the eluent was Colorless; weigh 2g of the filter residue washed with absolute ethanol ...

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Abstract

The invention particularly relates to a preparation method of a polyaniline / graphene water-based epoxy anticorrosive paint by blending a polyaniline composite material and a water-based epoxy resin, belonging to the technical field of anticorrosive paints. In order to solve the problems of lower water resistance and lower corrosion resistance of the coating due to abundant hydrophilic groups in the water-based epoxy resin paint which uses water as the solvent, the invention provides a preparation method of a polyaniline water-based epoxy resin anticorrosive paint. By using the characteristic of large specific area in the graphene, a polymerization-reduction process is utilized to prepare the large-specific-area high-dispersity polyaniline / graphene composite material, and the composite material is blended with the water-based epoxy resin to prepare the anticorrosive coating. The polyaniline / graphene composite material added into the water-based epoxy resin enhances the metallic corrosion potential, quickly conducts electrons formed in the corrosion process, and separates the cathode and anode reaction; a metal passivation layer is formed on the matrix surface to decelerate the metal corrosion; and the composite material with large specific area prolongs the seepage path of oxygen and water molecules to the carbon steel surface, and thus, has excellent barrier properties.

Description

technical field [0001] The invention specifically relates to a method for preparing polyaniline / graphene water-based epoxy anti-corrosion coatings by blending polyaniline composite materials and water-based epoxy resins, and belongs to the technical field of anti-corrosion coatings. Background technique [0002] With the continuous development of industrial technology and the widespread use of metal materials, the problem of metal corrosion is becoming more and more serious. About 20% of the metal materials in the world cannot be recycled due to corrosion. In order to reduce corrosion, the commonly used protection method is coating anticorrosion. The current metal anti-corrosion coatings often use solvent-based coatings, but because they contain heavy metals and harmful gases, they are easy to cause environmental pollution. Water-based coatings with advantages such as simplicity have become an important development direction. However, water-based epoxy resin coatings use w...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C08G73/02C23C22/50
CPCC09D163/00C08G73/0266C08L2205/03C09D5/08C23C22/50
Inventor 郭迎庆王龙
Owner 郭迎庆
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