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Graphene conductive anticorrosive coating for grounding grid and preparation method thereof

A conductive anti-corrosion and graphene technology, applied in anti-corrosion coatings, conductive coatings, epoxy resin coatings, etc., can solve the problems of poor dispersion of nano-fillers, easy to agglomerate, etc., to achieve improved electrical conductivity and corrosion resistance, good electrical conductivity, The effect of improving corrosion resistance and electrical conductivity

Inactive Publication Date: 2020-01-21
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are problems of poor dispersion and easy agglomeration of nano-fillers in coatings, and the dispersion performance of fillers is closely related to the conductivity and anti-corrosion properties of coatings, so it is of great significance to develop nano-fillers with excellent dispersion properties

Method used

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  • Graphene conductive anticorrosive coating for grounding grid and preparation method thereof
  • Graphene conductive anticorrosive coating for grounding grid and preparation method thereof
  • Graphene conductive anticorrosive coating for grounding grid and preparation method thereof

Examples

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preparation example Construction

[0027] Preferably, the preparation method of the acidified multi-walled carbon nanotubes comprises: adding the multi-walled carbon nanotubes into a mixture of concentrated sulfuric acid and concentrated nitric acid, and heating to reflux to obtain the acidified multi-walled carbon nanotubes. More preferably, the volume ratio of concentrated sulfuric acid to concentrated nitric acid in the mixture of concentrated sulfuric acid and concentrated nitric acid is (2-4):1, more preferably (2.5-3.5):1. Wherein, the heating to reflux is reflux reaction at 90-98° C. for 7-9 hours. Under the above conditions, the carbon nanotubes are sheared by the strong oxidative properties of the mixed acid, and the length of the tubes becomes shorter, and then groups such as hydroxyl groups and carboxyl groups appear in these destroyed places. This increases its own activity and removes impurities. At the same time, it also makes the surface of carbon nanotubes have hydroxyl, carboxyl and other group...

Embodiment 1

[0057] The ground grid described in the present embodiment uses the graphene conductive anticorrosion paint, comprises the following components with mass percentage:

[0058]

[0059] In the present embodiment, the preparation method of composite nanofiller graphene-p-phenylenediamine-carbon nanotube composite includes the following parts:

[0060] (1) First add 1.25g of sodium nitrate to the round bottom flask, then add 120mL of concentrated sulfuric acid to it, and stir in an ice bath; add 3g of graphite powder at a temperature lower than 5°C, and stir for 2.5 hours; slowly add 15g of high Potassium manganate, the temperature is controlled below 20°C; continue to stir for 2 hours. Adjust the temperature of the water bath to 95°C, slowly add deionized water, and continue stirring; finally add hydrogen peroxide, suction filter while it is hot, centrifugally wash, and vacuum dry to obtain graphene oxide.

[0061] (2) 5 g of multi-walled carbon nanotubes were added to a mixt...

Embodiment 2

[0068] The ground grid described in the present embodiment uses the graphene conductive anticorrosion paint, comprises the following components with mass percentage:

[0069]

[0070] Wherein, the composite nanofiller is the graphene-p-phenylenediamine-carbon nanotube composite described in Example 1.

[0071] According to the proportioning of each component of the graphene conductive anticorrosion coating for the above-mentioned grounding grid, the preparation method is as follows:

[0072] Take deionized water, dispersant, and solvent, add them to the reactor in turn, and mix them evenly with mechanical stirring, then add epoxy resin, filler, coupling agent, curing agent, and stir to make them evenly dispersed.

[0073] The stirring speed in each step in the above preparation process is 800 rpm, and the stirring is carried out at 20°C-35°C.

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Abstract

The invention relates to graphene conductive anticorrosive coating for a grounding grid and a preparation method thereof. Epoxy resin is used as a base material, and a composite nanofiller is added into the epoxy resin, so that the conductivity and the corrosion resistance of the epoxy resin can be greatly improved, the defects of a pure organic coating and a pure inorganic coating are overcome, and the graphene conductive anticorrosive coating has the comprehensive quality of an organic material, an inorganic material and a nano material. By adding the composite nanofiller, the corrosion resistance and conductivity of a coating are improved, the service lifetime of the coating is effectively prolonged, and the hardness, durability, acid and alkali resistance and the like of the coating are improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a graphene conductive anticorrosion coating for grounding grids and a preparation method thereof. Background technique [0002] The grounding grid is an important part of power equipment such as power plants, substations, and transmission lines, and plays the role of working grounding, lightning protection grounding, and protective grounding. However, since the grounding grid is buried underground for a long time or in a dark and humid environment, it is easily corroded, which poses a serious safety hazard. Therefore, research on anti-corrosion measures for grounding grids is urgent. Conductive anti-corrosion coatings are functional coatings that act on the surface of a substrate to conduct electrical current and prevent chemical or electrochemical corrosion. In recent years, the use of conductive anti-corrosion coatings to improve the corrosion resistance of grounding grids h...

Claims

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Application Information

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IPC IPC(8): C09D5/24C09D5/08C09D163/00
CPCC08K2201/001C08K2201/011C09D5/08C09D5/24C09D163/00C08K9/04C08K3/042C08K3/041
Inventor 杨波李茂东朱志平文芳张双红翟伟李爽
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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