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Method for preparing carbon particles/copper composite materials

A composite material and particle technology, applied in the field of preparing carbon-based particles/copper composite materials, can solve the problems of poor compatibility, difficulty in achieving compatibility of carbon-based particles and copper, etc., and achieve the effect of improving compatibility

Active Publication Date: 2012-01-04
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Because carbon-based particles and copper have different material properties, they are not compatible with each other
Generally, liquid phase sintering method and impregnation method are used to prepare carbon-based particles / copper composite materials, but it is difficult to achieve excellent compatibility between carbon-based particles and copper

Method used

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  • Method for preparing carbon particles/copper composite materials
  • Method for preparing carbon particles/copper composite materials
  • Method for preparing carbon particles/copper composite materials

Examples

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preparation example Construction

[0031] The first method of preparing the composite material according to the present invention is described below.

[0032] First, a solution of a polymer organic compound having a carbon backbone and a copper precursor in a solvent is mixed with a dispersion of carbon-based particles in a first dispersion medium to prepare a mixture (step 1).

[0033] The polymeric organic compound has a carbon backbone and may preferably include, but is not limited to, polyvinylpyrrolidone and polyvinyl alcohol, preferably in single or combined form, as long as the compound is soluble in a solvent.

[0034] The copper precursor may include any type of copper precursor as long as the copper precursor can form copper(I) oxide by a reducing agent as described below, such as i) a copper carboxyl compound of formula 1, or ii) The carboxyl group-containing compound of the general formula 2 and a copper salt.

[0035]

[0036] (R 1 -COO) 2 Cu

[0037] where R 1 is an alkyl group containing 1...

Embodiment 1

[0057] (1) 3 mg of graphite having an average particle size of 7 μm was added to 10 ml of ethylene glycol and subjected to ultrasonic treatment for 1 hour to prepare a dispersion. 50 mg of copper(II) acetate and 200 mg of polyvinylpyrrolidone (PVP) were dissolved in 5 ml of water, and then added to the dispersion liquid prepared above, followed by stirring.

[0058] (2) 15mg of N 2 H 5 OH was dissolved in 5 ml of water and added dropwise to the mixture obtained according to step 1. The particles were separated from the mixture, washed twice with water and dried.

[0059] (3) After the temperature was raised to 700°C at a temperature increase rate of 40°C / min, the particles obtained according to step 2 were sintered for 5 minutes in a nitrogen atmosphere.

Embodiment 2

[0061] The particles prepared according to steps 1 and 2 of Example 1 were redispersed in water to which excess NaBH was added 4 aqueous solution. The particles were isolated from the dispersion, washed twice with water and dried.

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Abstract

The present invention relates to a method for preparing a carbon-based particle / copper composite material in which carbon-based particles such as graphite and copper are mixed, the method including mixing a solution of a polymer organic compound having a main chain of carbon and a copper precursor in a solvent, with a dispersion solution of carbon-based particles in a first dispersion medium to produce a mixture, adding a first reducing agent to the mixture to form composite particles in which copper (I) oxide particles are attached to the surface of the carbon-based particles, and sintering the composite particles under a non-oxidizing atmosphere. According to the preparing method, a composition material is obtained, in which carbon-based particles and copper are well mixed.

Description

technical field [0001] The present invention relates to a method of preparing a carbon-based particle / copper composite material in which carbon-based particles such as graphite are mixed with copper. [0002] Cross-reference of related applications [0003] This application claims priority from Korean Patent Application No. 10-2009-0009287 filed in Korea on February 5, 2009 and Korean Patent Application No. 10-2010-0010860 filed in Korea on February 5, 2010 , the entire contents of these two Korean patent applications are incorporated herein by reference. Background technique [0004] Copper is widely used in various industrial fields due to its high thermal and electrical conductivity and low price. Copper alone is used in many cases, however, for a variety of reasons, in particular, as in the case of heat sinks, the use of copper mixed with carbon-based particles to form composite materials is increasingly Growth in which the above-mentioned carbon-based particles cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/532C04B35/528C04B35/571
CPCB22F2998/10C04B35/62805B22F2998/00C04B35/62889C04B35/62892C04B2235/425C22C32/0094C01B32/05C01B32/168C01B32/194C01B32/21C01B32/28C01G3/02B22F9/24B22F3/1039B22F2303/01B22F2301/10B08B17/06E04H12/08E04H12/2292F16B5/10F16B5/12
Inventor 李优榄金相澔朴钟昱
Owner LG CHEM LTD
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