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Method for preparing graphene composite material for pantograph

A technology of composite materials and pantographs, applied in current collectors, electric vehicles, power collectors, etc., can solve problems such as dependence on imports, low manufacturing costs, and high prices, and achieve reduced friction coefficient, increased impact toughness, The effect of improving conductivity

Inactive Publication Date: 2018-03-06
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the material of the pantograph is mainly metal-impregnated carbon slide plate, which has superior performance, but it is expensive, and there is no product with better performance in China, basically relying on imports
Therefore, the applicant believes that it is possible to develop a method for preparing graphene composite materials for pantographs in view of the various problems of the current carbon slide plate for pantographs. The prepared graphene composite materials have superior performance and relatively low manufacturing costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a graphene composite material for a pantograph, comprising the following steps:

[0020] S1, heat-treating the graphene microchips in a furnace at 340°C for 50 minutes to increase their activity;

[0021] S2, put the graphene microflakes treated in S1 into CuSO 4 In the plating solution, take it out after 4 minutes and wash it with deionized water for 3 times, then put it in a vacuum drying oven to dry;

[0022] The plating solution uses copper sulfate as the main salt, formaldehyde as the reducing agent, and α,α'-bipyridine as the stabilizer;

[0023] Its specific process parameters are:

[0024] 10g / L CuSO 4 +20mL / L HCHO+20g / L Na 2 EDTA+16g / L C 4 h 4 KNa 2 -4H 2 O;

[0025] S3, after uniformly mixing the graphene microchips processed in S2 with graphene powder, copper powder, and additives, put them into a mold and cold press them under a pressure of 200MPa to obtain a composite block;

[0026] Graphene microflakes are uniformly mixed ...

Embodiment 2

[0032] A method for preparing a graphene composite material for a pantograph, comprising the following steps:

[0033] S1, heat-treat the graphene microchips in a furnace at 360°C for 45 minutes to increase their activity;

[0034] S2, put the graphene microflakes treated in S1 into CuSO 4 In the plating solution, take it out after 5 minutes and wash it 4 times with deionized water, then put it in a vacuum drying oven to dry;

[0035] The plating solution uses copper sulfate as the main salt, formaldehyde as the reducing agent, and α,α'-bipyridine as the stabilizer;

[0036] Its specific process parameters are:

[0037] 10g / L CuSO 4 +20mL / L HCHO+20g / L Na 2 EDTA+16g / L C 4 h 4 KNa 2 -4H 2 O;

[0038] S3, after uniformly mixing the graphene microflakes processed in S2 with graphene powder, copper powder, and additives, put them into a mold and cold press them under a pressure of 180MPa to obtain a composite block;

[0039] Graphene microflakes are uniformly mixed with g...

Embodiment 3

[0045] A method for preparing a graphene composite material for a pantograph, comprising the following steps:

[0046] S1, heat-treating the graphene microchips in a furnace at 300°C for 60 minutes to increase their activity;

[0047] S2, put the graphene microflakes treated in S1 into CuSO 4 In the plating solution, take it out after 6 minutes and wash it with deionized water for 5 times, then put it into a vacuum drying oven to dry;

[0048] The plating solution uses copper sulfate as the main salt, formaldehyde as the reducing agent, and α,α'-bipyridine as the stabilizer;

[0049] Its specific process parameters are:

[0050] 10g / L CuSO 4 +20mL / L HCHO+20g / L Na 2 EDTA+16g / L C 4 h 4 KNa 2 -4H 2 O;

[0051] S3, after uniformly mixing the graphene microchips processed in S2 with graphene powder, copper powder, and additives, put them into a mold and cold press them under a pressure of 240MPa to obtain a composite block;

[0052] Graphene microflakes are uniformly mixe...

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Abstract

The invention discloses a method for preparing a graphene composite material for a pantograph. The method comprises the steps as follows: S1, graphene nano-platelets are placed into a furnace at 300-400 DEG C for heat treatment for 40-60 min, and the activity of the graphene nano-platelets is improved; S2, the graphene nano-platelets treated in S1 are placed in a CuSO4 plating solution for copperplating, are taken out after 3-6 min, are washed with deionized water for 3-6 times and then are placed into a vacuum drying oven for drying; S3, the graphene nano-platelets treated in S2 are evenly mixed with graphene powder, copper powder and an additive, then the mixture is placed into a mold to be subjected to cold-press molding under the pressure of 150-270 MPa, and a composite block is obtained; the graphene nano-platelets, the graphene powder, the copper powder and the additive are evenly mixed in parts by weight as follows: 10-30 parts of the graphene nano-platelets, 10-20 parts of thegraphene powder, 64-78 parts of the copper powder and 5 parts of the additive; S4, the composite block formed through cold-press molding in S3 is placed into a sintering furnace for sintering, a shielding gas is introduced to prevent the composite block from being oxidized, the sintering temperature ranges from 800 DEG C to 900 DEG C, and the duration ranges from 3 h to 5 h; S5, the composite block treated in S4 is machined into the pantograph adopting the structure designed in advance.

Description

technical field [0001] The invention relates to a graphene composite material, in particular to a method for preparing a graphene composite material for a pantograph. Background technique [0002] The pantograph is the electrical equipment used by the electric traction locomotive to obtain electric energy from the catenary, and is installed on the roof of the locomotive or motor car. At present, the pantograph is mainly made of metal-impregnated carbon slide plate, which has superior performance, but it is expensive, and there is no product with better performance in China, basically relying on imports. Therefore, the applicant believes that a method for preparing a graphene composite material for a pantograph can be developed to solve various problems of the current pantograph carbon slide. The prepared graphene composite material has superior performance and relatively low manufacturing cost. Contents of the invention [0003] In view of the above-mentioned defects in t...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F1/02C22C9/00B60L5/18
CPCC22C9/00C22C32/0084B22F5/00B60L5/18B22F2998/10B22F1/17B22F3/1007B22F3/02
Inventor 武建军
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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