Super-hydrophobic conductive coating material and preparation method thereof

A conductive coating, super-hydrophobic technology, applied in conductive coatings, polycarbonate coatings, coatings, etc., can solve the problems of coating peeling, coating failure, and inability to uniformly compound, achieve uniform heating, long life, and improve hydrophobicity Effect

Active Publication Date: 2017-08-18
中安瑞材(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent, carbon fiber is used as the bottom layer, which cannot be uniformly compounded with other coating components. Long-term heating is likely to cause the coating to fall off due to the difference in thermal expansion rate, making the coating invalid

Method used

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  • Super-hydrophobic conductive coating material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of this superhydrophobic conductive coating comprises steps:

[0034] (1) Prepare graphene-coated nano-inorganic particles:

[0035] Add 85-99% of nano-inorganic particles with a particle size of 1-200nm, 0.5-10% of graphene and 0.5-5% of dispersant into absolute ethanol and thoroughly mix for 2-12 hours through wet ball milling, The surface of the nanoparticle is coated with sheet-like graphene; then fully dried and crossed a 500-mesh sieve; the nano-inorganic particles coated with graphene are obtained; the typical scanning electron microscope photos of the nano-inorganic particles coated with graphene are as follows figure 1 As shown, it can be observed that a layer of film-like graphene is coated on the particle surface;

[0036] (2) Preparation of superhydrophobic conductive coating:

[0037] Under certain temperature and / or atmosphere protection conditions, mix 40-79% superhydrophobic raw materials, 1-10% graphene and 20-50% graphene-coate...

Embodiment 1

[0039] (1) 90% of TiO with a particle size of 200nm 2 , and 5% graphene and 5% PEG-400 were added to anhydrous ethanol solvent, followed by ball milling for 4 hours; the slurry after ball milling was placed in an oven at 60°C for 8 hours, then ground and passed through a 500-mesh sieve; Graphene-coated titanium dioxide particles are obtained.

[0040] (2) 40% of the above-mentioned graphene-coated titanium dioxide particles, 10% graphene and 50% perfluorooctadecyltrichlorosilane were dissolved in n-hexane and mixed thoroughly; superhydrophobic conductive coating was obtained.

[0041] After the paint is sprayed and dried, the contact angle of the coating to water can reach 150°, and it can heat up to 38°C when connected to 24V voltage.

Embodiment 2

[0043] (1) 95% of Al with a particle size of 100nm 2 o 3 , and 3% graphene, 2% PEG-400 were added to anhydrous ethanol solvent, followed by ball milling for 8 hours; the slurry after ball milling was placed in an oven at 60°C for 8 hours, then ground and passed through a 500-mesh sieve; Graphene-coated alumina particles are obtained.

[0044] (2) 30% of the above-mentioned graphene-coated alumina particles, 5% graphene and 65% perfluoropolymethacrylate are dissolved in trifluorotrichloroethane and fully mixed to obtain a superhydrophobic conductive coating.

[0045]After the coating is sprayed and dried, the contact angle of the coating to water can reach 157°, and it can heat up to 25°C when connected to 24V voltage

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Abstract

The invention provides a super-hydrophobic conductive coating material. The super-hydrophobic conductive coating material comprises a functional material and an organic solvent, wherein according to the total mass of the functional material, the functional material comprises 40-79% of a super-hydrophobic raw material, 1-10% of graphene and 20-50% of graphene-coated inorganic nano-particles. The invention also provides a method for preparing the super-hydrophobic conductive coating material and a super-hydrophobic conductive coating formed by the super-hydrophobic conductive coating material. The super-hydrophobic conductive coating has the water contact angle of 135-160 degrees, and can be heated up to 20-40 DEG C under the voltage of 12-24 V. The invention further provides an air processing unit, of which at least part of the surface is coated with the super-hydrophobic conductive coating, and application of the super-hydrophobic conductive coating material or the super-hydrophobic conductive coating to freezing and frosting resistance or freeze and frost removal.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a superhydrophobic conductive coating and a preparation method thereof. Background technique [0002] When the air handling unit or heat pump is heating in winter, frosting on the outside unit is a common problem. The adverse effects of frosting are: (1) blocking the passage between the fins, increasing the air flow resistance; (2) affecting the heat transfer of the heat exchanger, reducing the heat exchange capacity; (3) frequent defrosting, increasing In addition to energy consumption, the performance of air handling units or heat pumps deteriorates. [0003] At present, one of the commonly used defrosting methods is to stop the defrosting and let the frost melt by itself. This method is not feasible when the temperature is low, and it takes a long time to melt the frost. Air handling units generally do not use this method; One is heating and defrosting, that is, the four-way valve ex...

Claims

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Application Information

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IPC IPC(8): C09D183/08C09D133/16C09D169/00C09D5/24C09D7/12
CPCC08K3/04C08K3/22C08K3/36C08K9/06C08K9/10C08K2003/2227C08K2201/011C09D4/00C09D5/24C09D7/61C09D7/62C09D133/16C09D169/00C08G77/24
Inventor 宋波袁征李艳杰
Owner 中安瑞材(北京)科技有限公司
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