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Graphite phase carbon nitride-graphene compound-modified self-cleaning heat-conduction fluorocarbon finish paint

A graphite-phase carbon nitride and fluorocarbon topcoat technology, which is applied in the field of coatings, can solve the problem of organic pollutant adhesion, which is not well resolved, unfavorable for photogenerated electron-hole migration and separation, and electron-hole recombination rate Advanced problems, to achieve the effect of improving self-cleaning ability, easy to promote, and simple and convenient operation

Active Publication Date: 2017-05-31
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of the adhesion of organic pollutants on the surface of fluorocarbon coatings has not been well resolved.
[0004] However, as a polymer material, graphitic carbon nitride has high exciton binding energy, which is not conducive to the migration and separation of photogenerated electrons and holes, resulting in high recombination rate of electrons and holes and low quantum efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] 1. Preparation of graphite oxide

[0045] The preparation of graphite oxide adopts the Hummers method: a certain amount of graphite powder is weighed and added to a round bottom flask, and then sodium nitrate (NaNO 3 ) and concentrated sulfuric acid, slowly add potassium permanganate (K 2 MnO 4), continue to stir for 3h; heat up to 35°C and stir for 4h; add water to the flask and heat up to 98°C, continue to stir for 3h; add H 2 o 2 After washing, filtering and drying, graphite oxide is obtained.

[0046] 2. Preparation of graphitic carbon nitride-graphene oxide composites

[0047] A certain amount of melamine and graphite oxide (the mass ratio of graphene oxide to melamine is 1:50) was added to the mixed solution of water and ethanol according to the mass ratio, ultrasonically dispersed for 30 minutes; stirred at room temperature for 1 hour; then freeze-dried and ground. Put the ground powder into a crucible with a cover, place it in a muffle furnace protected by ...

Embodiment 1

[0049] Fluorocarbon resin: 65

[0050] Solvent: 30

[0051] g-C 3 N 4 / rGO:2.5

[0052] Defoamer: 0.5

[0053] Leveling agent: 2

[0054] The preparation steps of the modified fluorocarbon topcoat described in this embodiment are as follows:

[0055] (1) Weigh the fluorocarbon resin, solvent, graphite phase carbon nitride, defoamer and leveling agent according to the selected weight percentage, stir at a speed of 1000r / min for 2 to 3 hours, and disperse evenly;

[0056] (2) Take isocyanate according to the ratio of fluorocarbon resin and curing agent 4:1, fully stir and mix evenly;

[0057] (3) Brush the fluorocarbon topcoat prepared by the above method on the sample that has been primed.

Embodiment 2

[0059] Fluorocarbon resin: 60

[0060] Solvent: 33

[0061] g-C 3 N 4 / rGO:5

[0062] Defoamer: 0.5

[0063] Leveling agent: 1.5

[0064] The preparation steps of the modified fluorocarbon topcoat described in this embodiment are as follows:

[0065] (1) Weigh the fluorocarbon resin, solvent, graphite phase carbon nitride, defoamer and leveling agent according to the selected weight percentage, stir at a speed of 1000r / min for 2 to 3 hours, and disperse evenly;

[0066] (2) Take isocyanate according to the ratio of fluorocarbon resin and curing agent 4:1, fully stir and mix evenly;

[0067] (3) Brush the fluorocarbon topcoat prepared by the above method on the sample that has been primed.

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Abstract

The invention provides a graphite phase carbon nitride-graphene compound-modified fluorocarbon finish paint which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 4:1; the component A is prepared from the following raw materials in parts by weight: 40-70 parts of fluorocarbon resin, 30-40 parts of an organic solvent, 0.5-25 parts of g-C3N4 / rGO, 0.1-0.5 part of an antifoaming agent and 0.1-2 parts of a flatting agent; and the component B is a blocked isocyanate curing agent. Graphite phase carbon nitride in a coating can be subjected to photocatalytic reaction under visible light, so that the self-cleaning effect of the coating is achieved. Through addition of graphene, fast separation of a photoelectric electron-hole pair can be achieved, the photocatalytic efficiency and the self-cleaning capability are improved, and the heat dissipation performance of the coating is greatly improved by the high heat conductivity coefficient of the graphene. The graphite phase carbon nitride-graphene compound-modified fluorocarbon finish paint is simple in step, convenient to operate and high in practicability.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a graphite-phase carbon nitride-graphene composite modified self-cleaning heat-conducting fluorocarbon topcoat. Background technique [0002] The F-C bond energy in fluorocarbon resin is as high as 486KJ / mol, showing ultra-high chemical stability and weather resistance, so it becomes the first choice material for topcoat. However, the problem of the adhesion of organic pollutants on the surface of fluorocarbon coatings has not been well resolved. Especially in recent years, with the aggravation of environmental pollution, the concentration of organic pollutants in the atmosphere continues to increase, which greatly affects the aesthetics and durability of coatings. [0003] Graphite phase carbon nitride is a typical electron-rich organic semiconductor material with a forbidden band width of ~2.7eV between the conduction band and the valence band, and can absorb blue-violet ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D5/32C09D7/12
CPCC08L2203/202C09D5/32C09D7/61C09D127/12C08L33/04C08K3/04C08K3/28C08K5/29
Inventor 李文静王刚冯璨樊志彬岳增武李辛庚张振岳王晓明闫风洁郭凯吴亚平翟季青刘延华
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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