Aluminum-based nickel-zinc-plated graphene thin film material with high heat conduction performance and corrosion resistance and preparation method for graphene thin film material
A graphene film, corrosion-resistant technology, applied in the direction of electrolytic coatings, coatings, etc., can solve the problems of difficult to use thermally conductive materials, non-wetting, materials can not be well dispersed, etc., to achieve a broad application environment, improve thermal conductivity, etc. coefficient and effect of corrosion resistance
Active Publication Date: 2015-04-29
GUANGXI NORMAL UNIV
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Problems solved by technology
In the existing methods of modifying aluminum and its alloy materials, there is a method of adding materials with excellent thermal conductivity to the aluminum material in the molten state to improve the thermal conductivity of the aluminum material, but aluminum and most of the materials do not wet each other in the molten state , these materials cannot be well dispersed in aluminum, so it is difficult to apply them to thermal conductive materials
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[0028] A method for preparing an aluminum-based nickel-plated zinc graphene film material with excellent thermal conductivity and corrosion resistance, comprising the steps of:
[0029] 1) Degreasing the aluminum substrate sample in a degreasing solution at 65°C for 3 minutes, washing it with clean water, then emitting light in a light emitting solution at 25°C for 2 minutes, and cleaning it with clean water. Dip zinc in the zinc dipping solution for 2 minutes, and rinse with clean water. Primary zinc dipping solution: 155ml / L hydrofluoric acid, 75g / L boric acid, 6.5g / L zinc oxide
[0030] 2) The sample after the primary zinc dipping is dipped in the secondary zinc dipping solution at 25°C for 2 minutes, and cleaned with clean water. Secondary zinc dipping solution: sodium hydroxide 185g / L, trisodium citrate 15g / L, zinc sulfate heptahydrate 65g / L, nickel sulfate hexahydrate 35g / L, ferric chloride 2.5g / L, sodium tartrate tetrahydrate Potassium 110g / L, Thiourea 8g / L
[0031] ...
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The invention discloses an aluminum-based nickel-zinc-plated graphene thin film material with high heat conduction performance and corrosion resistance and a preparation method for the graphene thin film material. The method comprises the following steps: putting an aluminum base material test sample into primary zinc immersion liquid with the temperature of 25 DEG C for zinc immersion for 2 minutes after the aluminum base material test sample is subjected to oil removal and polishing, and cleaning the aluminum base material test sample with clean water; putting the test sample subjected to primary zinc immersion into secondary zinc immersion liquid with the temperature of 25 DEG C for zinc immersion for 2 minutes, and cleaning the test sample with clean water; performing direct current electroplating on the test sample subjected to secondary zinc immersion in substrate nickel plating liquid with the temperature of 25 DEG C for 5 minutes under the current density of 1-3 A / dm<2> and the polar distance of 5 cm, and cleaning the test sample with clean water. The material prepared by the preparation method disclosed by the invention is high in environment adaptability and can be applied to the outdoor environment, and the heat dissipation capacity can be improved by over 20 percent. The preparation method is low in requirement on equipment and is convenient to operate; the technical line is definite, and the thickness of a thin film can be controlled.
Description
technical field [0001] The invention relates to the technical field of heat dissipation components for LED modules, in particular to an aluminum-based nickel-plated zinc graphene film material with excellent thermal conductivity and corrosion resistance and a preparation method thereof. Background technique [0002] Light-emitting diodes (LEDs) have gradually replaced traditional lighting appliances in the lighting field due to their luminous efficiency much higher than traditional lighting appliances, long service life, energy saving and environmental protection. It is known from the principle of LED luminescence that LED luminescence is the release of energy in the form of photons during the transition of high-energy band electrons to low-energy bands. In this process, the non-radiative recombination of electrons and holes will produce lattice oscillations. It is part of the energy that is converted into heat. The heat needs to be dissipated through convection heat transf...
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IPC IPC(8): C25D5/12C25D3/12C25D3/56C25D15/00
CPCC25D3/12C25D3/56C25D5/12C25D15/00
Inventor 黄有国陈家荣王红强李庆余范海林陈肇开王龙超陈玉华胡丽娜杨观华吴强
Owner GUANGXI NORMAL UNIV