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Graphite-based water-based heat-conducting silicate coating and preparation method thereof

A silicate and graphite technology, used in alkali metal silicate coatings and coatings, etc., can solve the problems of poor thermal conductivity and heat dissipation of coatings, poor thermal conductivity and heat dissipation of silicate coatings, and heat can not be dissipated in time.

Inactive Publication Date: 2020-07-07
段尚军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The silicate coatings prepared in the above-mentioned patent technical documents have good properties such as high temperature resistance and flame retardancy, but the heat conduction and heat dissipation performance of the silicate coatings is not good, and the poor heat conduction and heat dissipation performance of the coatings will cause the heat generated by the object to be delayed. exude

Method used

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  • Graphite-based water-based heat-conducting silicate coating and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of modified graphite comprises the following steps:

[0030]Put flake graphite in a microwave oven and microwave at 800W for 10s to obtain expanded graphite for later use; mix absolute ethanol and deionized water at a volume ratio of 1:6 to obtain an aqueous ethanol solution, and take sodium silicate and cetyl tris Add methyl ammonium bromide to ethanol aqueous solution and stir to dissolve to obtain a 0.7mol / L sodium silicate solution. The amount of cetyltrimethylammonium bromide added is 6% of the mass of sodium silicate; add ammonium chloride to deionized Stir and dissolve in water to prepare an ammonium chloride solution with a concentration of 2.5 mol / L, heat it in a water bath to 45°C, add expanded graphite and nano-silicon carbide to the ammonium chloride solution, and the mass ratio of the added expanded graphite to sodium silicate is 1 : 2.5, the addition of nano-silicon carbide is 30wt% of expanded graphite, stirring and dispersing to ob...

Embodiment 2

[0036] The preparation method of modified graphite comprises the following steps:

[0037] Put flake graphite in a microwave oven and microwave at 700W for 20s to obtain expanded graphite for later use; mix absolute ethanol and deionized water at a volume ratio of 1:8 to obtain an aqueous ethanol solution, and take sodium silicate and cetyl tris Add methylammonium bromide to ethanol aqueous solution and stir to dissolve to obtain a 0.5mol / L sodium silicate solution. The amount of cetyltrimethylammonium bromide added is 3% of the mass of sodium silicate; add ammonium chloride to deionized Stir and dissolve in water to prepare an ammonium chloride solution with a concentration of 2.0mol / L, heat it in a water bath to 40°C, add expanded graphite and nano-silicon carbide to the ammonium chloride solution, and the mass ratio of the added expanded graphite to sodium silicate is 1 : 1.5, the addition of nano-silicon carbide is 25wt% of expanded graphite, stirring and dispersing to obt...

Embodiment 3

[0043] The preparation method of modified graphite comprises the following steps:

[0044] Put flake graphite in a microwave oven and microwave at 750W for 15s to obtain expanded graphite for later use; mix absolute ethanol and deionized water at a volume ratio of 1:7 to obtain an aqueous ethanol solution, and take sodium silicate and cetyl tris Add methyl ammonium bromide to ethanol aqueous solution and stir to dissolve to obtain a 0.8mol / L sodium silicate solution. The amount of cetyltrimethylammonium bromide added is 5% of the mass of sodium silicate; add ammonium chloride to deionized Stir and dissolve in water to prepare an ammonium chloride solution with a concentration of 3mol / L, heat it in a water bath to 43°C, add expanded graphite and nano-silicon carbide to the ammonium chloride solution, and the mass ratio of the added expanded graphite to sodium silicate is 1: 3. The addition amount of nano-silicon carbide is 35wt% of the expanded graphite, stir and disperse to ob...

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Abstract

The invention relates to the technical field of coatings, and discloses a graphite-based water-based heat-conducting silicate coating and a preparation method thereof. The coating is prepared from thefollowing components in parts by weight: 60 to 80 parts of a film forming matter, 15 to 20 parts of quartz sand, 10 to 15 parts of dolomite, 5 to 10 parts of modified graphite, 1 to 3 parts of pigment, 0.5 to 1 part of a defoaming agent, 0.5 to 1 part of a dispersing agent and 30 to 50 parts of water. The brake pad is good in wear resistance and heat resistance and stable in friction coefficient;the preparation method of the coating comprises the following steps: firstly, adding a film-forming substance, quartz sand, dolomite, a defoaming agent and water into a stirring kettle and stirring for 30 to 50min at a stirring speed of 400 to 500r / min; and then adding the modified graphite, the pigment and the dispersing agent into the premix, and continuing to stir for 20-30 minutes at the stirring speed of 600-800r / min so as to obtain the high-temperature-resistant and high-pressure-resistant coating. The silicate heat-conducting coating disclosed by the invention has excellent high-temperature resistance and heat-conducting and heat-dissipating properties.

Description

technical field [0001] The technical field of coatings of the present invention particularly relates to a graphite-based water-based heat-conducting silicate coating and a preparation method thereof. Background technique [0002] Generally, coatings will undergo thermal degradation and carbonization under high temperature conditions, resulting in coating damage and cannot play a protective role. High temperature resistant coatings do not crack, bubble or peel off under high temperature conditions, and can still maintain certain physical and mechanical properties. Performance, so that objects from high-temperature chemical corrosion, thermal oxidation, high-temperature resistant coatings are widely used in chimneys, high-temperature steam pipes, heat exchangers, high-temperature furnaces, petroleum cracking equipment, etc. Among them, organic high-temperature-resistant coatings include organic silicon, phenolic resin, modified epoxy, and polyurethane. The heat-resistant tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/04C09D7/61C09D7/62
CPCC09D1/04C09D7/61C09D7/62
Inventor 段尚军
Owner 段尚军
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