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Graphene heat dissipation coating and graphene heat dissipation material for aluminum electrolytic capacitor, and preparation methods thereof

A technology of aluminum electrolytic capacitors and heat-dissipating coatings, which is applied in the direction of anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., can solve problems such as easy scratches, achieve good electrical insulation performance, strong adhesion, and ensure insulation Effect

Inactive Publication Date: 2020-05-08
新疆烯金石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the resin-coated aluminum coating material involved in this technology has epoxy resin or polyester resin formed on the outermost surface, it has advantages in formability, but there is a problem that it is easy to be scratched for capacitors that are molded under particularly severe conditions

Method used

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  • Graphene heat dissipation coating and graphene heat dissipation material for aluminum electrolytic capacitor, and preparation methods thereof
  • Graphene heat dissipation coating and graphene heat dissipation material for aluminum electrolytic capacitor, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0069] The above-mentioned preparation method of the graphene heat-dissipating coating for aluminum electrolytic capacitor comprises the following steps:

[0070] A prepares the bottom graphene heat dissipation coating:

[0071] Adding the modified graphene oxide powder into the polyester resin, and dispersing evenly, to obtain the feed liquid 1;

[0072] After mixing the rheological additive, dispersant and solvent uniformly, the feed solution 2 is obtained;

[0073] Add feed liquid 1 into feed liquid 2, mix evenly, and perform sand milling or ball milling to obtain feed liquid 3;

[0074] Add silicon carbide and a coupling agent to the feed liquid 3, and after mixing evenly, perform sand milling or ball milling to obtain the bottom graphene heat dissipation coating;

[0075] B prepares the surface layer graphene heat dissipation coating:

[0076] Adding the modified graphene oxide powder into the epoxy resin, and dispersing evenly, to obtain the feed liquid 4;

[0077] A...

specific Embodiment

[0093] The raw materials used in the examples are all commercially available.

[0094] The molecular weight of epoxy resin is 500-3500; the molecular weight of polyester resin is 5000-35000.

[0095] The coupling agent is silane coupling agent KH550.

[0096] The length of silicon carbide is 20-50um.

[0097] The rheological additive is BYK-410.

[0098] The dispersant is MT-415UV dispersant.

[0099] The solvent is toluene or xylene.

[0100] Graphene oxide is a graphene oxide dispersion prepared by an improved hummers method. The graphene oxide dispersion has a sheet diameter of 1-50 μm, and more than 80% of them are within 3 layers.

Embodiment 1

[0102] The specific operation steps are as follows:

[0103] A graphene heat dissipation coating for aluminum electrolytic capacitors

[0104] Prepare 1kg of bottom graphene heat dissipation coating and top layer graphene heat dissipation coating respectively

[0105] Raw material preparation (according to weight percentage):

[0106] The underlying graphene heat dissipation coating includes: 65% polyester resin, 1% modified graphene oxide powder, 1% silane coupling agent KH550, 6% silicon carbide, 1% BYK-410 rheology additive, 2% MT- 415UV dispersant and 24% xylene solvent;

[0107] The surface graphene heat dissipation coating includes: 55% epoxy resin, 1.5% modified graphene oxide powder, 1.5% silane coupling agent KH550, 8% silicon carbide, 1% BYK-410 rheology additive, 2% MT -415UV dispersant and 31% xylene solvent.

[0108] Preparation of paint:

[0109] a prepare the bottom graphene heat dissipation coating:

[0110] (1) After the graphene oxide dispersion prepare...

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Abstract

The invention relates to a graphene heat dissipation coating and graphene heat dissipation material for an aluminum electrolytic capacitor, and preparation methods thereof. The graphene heat dissipation coating for the aluminum electrolytic capacitor disclosed in the invention comprises a bottom-layer graphene heat dissipation coating and a surface-layer graphene heat dissipation coating, whereinthe bottom-layer graphene heat dissipation coating comprises, in percentage by weight, 30 to 65% of polyester resin, 0.5 to 10% of modified graphene oxide powder, 1 to 5% of a coupling agent, 5 to 15%of silicon carbide, 0.5 to 5% of a rheological agent, 0.1 to 2% of a dispersing agent and 10 to 45% of a solvent; and the surface graphene heat dissipation coating comprises, in percentage by weight,30-65% of epoxy resin, 0.5-10% of modified graphene oxide powder, 1-5% of a coupling agent, 5-15% of silicon carbide, 0.5-5% of a rheological agent, 0.1-2% of a dispersing agent and 10-45% of a solvent. According to the graphene heat dissipation coating for the aluminum electrolytic capacitor, a coating scattering material has excellent heat dissipation performance and stable performance, and heat dissipation capacity is greatly improved in a later period that the aluminum electrolytic capacitor is coated with the heat dissipation coating.

Description

technical field [0001] The invention belongs to the field of heat dissipation materials, and in particular relates to a graphene heat dissipation coating for aluminum electrolytic capacitors, a graphene heat dissipation material and a preparation method thereof. Background technique [0002] At present, with the large-scale popularization of aluminum electrolytic capacitors, it has become a trend for related electronic products to be miniaturized, high-powered, and highly integrated. Self-heating of aluminum electrolytic capacitors during operation During operation, due to the internal resistance (ESR) inside the electrolytic capacitor, the ripple current flowing through the capacitor will cause the capacitor to heat up. The temperature rise of the capacitor is proportional to the square of the ripple current and the equivalent series resistance ESR, and inversely proportional to the surface area and heat dissipation coefficient of the capacitor. Therefore, the magnitude of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D163/00C09D5/25C09D5/08C09D7/61B05D7/00B05D7/22B05D7/24
CPCC09D167/00C09D163/00C09D5/00C09D5/08C09D7/61B05D7/24B05D7/227B05D7/00B05D7/544B05D2508/00B05D2504/00C08K9/00C08K3/042C08K5/544C08K3/34C08K13/06
Inventor 杨新伟曾艳王国伟王俊强卢科伟
Owner 新疆烯金石墨烯科技有限公司
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