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Inorganic zinc-rich paint containing modified graphene and preparation method of inorganiczinc-rich paint

An inorganic zinc-rich coating, graphene technology, applied in anti-corrosion coatings, conductive coatings, coatings and other directions, can solve problems such as anti-corrosion performance to be improved, and achieve the effect of improving anti-corrosion performance, overcoming easy agglomeration, and improving electrical conductivity

Inactive Publication Date: 2018-11-20
CHONGQING ACADEMY OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicic acid ester hydrolyzes after absorbing moisture, and can be cross-linked with zinc powder to form a network polymer, and further combined with polyvinyl butyral, which greatly enhances the adhesion of the coating and the strength of the film, but its anti-corrosion performance is still needs improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the preparation of modified graphene

[0023] (1) Add 500mg of 4-aminobenzoic acid and 200mg of sodium nitrite into 100ml of water in sequence, and stir for 2 hours under ice bath;

[0024] (2) Add 6g of 1N hydrochloric acid to the reaction system under ice bath, and continue to stir in ice bath for 2h;

[0025] (3) Add 1 g of reduced graphene oxide to water, ultrasonically disperse for 15 minutes, then add the dispersion to the above reaction solution and stir in an ice bath for 3 hours;

[0026] (4) Stand overnight, filter, wash the filter cake with water until neutral, wash the filter cake 3 times with 60% ethanol, and obtain 0.8 g of the product after drying.

[0027] According to this method, several types of modified graphenes modified by functional groups such as benzoic acid, benzenesulfonic acid and ethanolamine were obtained.

Embodiment 2

[0028] Embodiment 2, the preparation of the inorganic zinc-rich coating of modified graphene

[0029] (1) Add 1% of the total weight of the modified graphene into ethyl silicate, shake and stir until a stable and uniform solution is formed, and component A is obtained.

[0030] (2) Add 0.3% of the total weight of the silane coupling agent into polyvinyl butyral, stir and mix evenly to obtain B.

[0031] (3) Add component B to component A in a ratio of 1:5. After stirring evenly, add component C (zinc powder) of equal weight and keep stirring. After 30 minutes, graphene-modified Inorganic zinc-rich coatings.

Embodiment 3

[0032] Embodiment 3, anticorrosion experiment of graphene modified inorganic zinc-rich coating

[0033] (1) Treatment of the iron sheet: polish the 2cm*10cm iron sheet with an angle grinder until the metal color on the surface of the iron sheet is sufficient, then polish the edges and corners of the iron sheet with a file, rinse with absolute ethanol and dry it for later use.

[0034] (2) Treatment of the paint: Mix the components of the zinc-rich paint in proportion, stir evenly, and then let it stand for 30 minutes.

[0035] (3) Brushing operation: Dip the paint with a wool brush, evenly brush it on the iron sheet, and hang it to dry for more than 48 hours for later use.

[0036] (4), soaking operation: prepare sodium chloride solution according to the concentration ratio of 3.5%, then vertically immerse the iron sheet brushed with paint in the sodium chloride solution, and observe the corrosion situation of the iron sheet.

[0037] According to the records and observations...

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Abstract

The invention relates to the field of paint and particularly relates to inorganic zinc-rich paint containing modified graphene and a preparation method of the inorganic zinc-rich paint. The paint is prepared from the following three components in parts by weight: A: 40-50 parts of ethyl silicate and 0.5-1.0 parts of modified graphene; B: 5-10 parts of polyvinyl butyral and 0.2-0.5 parts of a silane coupling agent; and C: 40-55 parts of zinc powder, wherein the modified grapheme refers to modified grapheme which can be stably dispersed in alcohol and silicate ester. The modified graphene adopted in the paint can be uniformly and stably dispersed in an alcoholic solvent without addition of a surfactant, and the defect that the graphene is easily agglomerated in an inorganic medium is overcome, so that the modified graphene can be uniformly dispersed in the inorganic zinc-rich paint, the electrical conductivity of the paint is improved, the water insulation effect of the paint is enhanced, and then the corrosion resistance of the paint is remarkably improved.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an inorganic zinc-rich coating with modified graphene and a preparation method thereof. Background technique [0002] Corrosion of metal materials causes a large amount of waste of resources, and the annual loss caused by corrosion problems in the world is as high as tens of billions of dollars. Therefore, the research on anti-corrosion methods of metal materials has always been an important research field. Anti-corrosion coatings are one of the most common anti-corrosion methods, but the types, compositions, properties and uses of anti-corrosion coatings vary widely. Simple classification, coatings can be divided into organic coatings and inorganic coatings. Because organic coatings contain a large amount of organic solvents, these solvents volatilize into the atmosphere, causing air pollution and seriously affecting environmental safety and human health. Therefore, traditional organic ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/24C09D5/10
CPCC09D1/00C09D5/106C09D5/24
Inventor 李滨程鹏王玉秦建波
Owner CHONGQING ACADEMY OF SCI & TECH
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