Method for preparing carbon-based particle/copper composite material

{
  "publication_number": "US9776928B2",
  "country": "US",
  "kind": "B2",
  "title": "Method for preparing carbon-based particle/copper composite material",
  "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.",
  "claims": [
    "1. A method for preparing a carbon-based particle/copper composite material, comprising: mixing a polyvinyl pyrrolidone and a copper carboxyl compound of Formula 1: (R 1 - COO) 2 Cu where R 1 is methyl, in water to form a solution; mixing carbon-based particles each having a surface with a first dispersion medium using an ultrasonic treatment to produce a dispersion, wherein the carbon-based particles are graphite; mixing the solution and the dispersion to form 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, wherein the first reducing agent is NaBH 4, hydrazine, or mixtures thereof; and sintering the composite particles under a non-oxidizing atmosphere to form composite particles in which the surface of the carbon-based particles is coated with copper.",
    "2. The method for preparing a carbon-based particle/copper composite material according to claim 1, wherein the first dispersion medium is any one selected from the group consisting of water, C 1 -C 6 low alcohol, dimethylformamide, dimethylsulfoxide, tetrahydrofuran, and acetonitrile, or mixtures thereof.",
    "3. The method for preparing a carbon-based particle/copper composite material according to claim 1, wherein the non-oxidizing atmosphere is any one selected from the group consisting an inert gas atmosphere, a vacuum atmosphere, and a reducing gas atmosphere.",
    "4. The method for preparing a carbon-based particle/copper composite material according to claim 1, wherein the first dispersion medium is ethylene glycol."
  ],
  "description_excerpt": "This application is a continuation application of PCT/KR2010/00730, filed on Feb. 5, 2010, which claims priority to Korean Patent Application No. 10-2009-0009287, filed on Feb. 5, 2009, and Korean Patent Application No. 10-2010-0010860, filed on Feb. 5, 2010, all of which are incorporated herein by reference.\n\nThe 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.\n\nCopper is widely used in various fields of industry because of its high thermal and electrical conductivity and low price. In many cases, copper is used by itself, however, due to various reasons, in particular, like in the case of a heat sink, the use of copper mixed with carbon-based particles containing carbon as a main component, for example, graphite, SiC, carbon nanotubes, and the like, to form a composite material, is increasing.\n\nIn a carbon-based particle/copper composite material, the mixed state of carbon-based particles and copper is very important. When the mixed state of the two components is incompatible and the components exist separate from each other, it is impossible to obtain the material properties resulting from the complexation of the two components, and the mechanical properties reduce as well.\n\nBecause carbon-based particles and copper have different material properties, compatibility therebetween is poor.",
  "cpc": [
    "C04B 35/62892",
    "B08B 17/06",
    "B22F 2301/10",
    "B22F 2303/01",
    "B22F 2998/00",
    "B22F 2998/10",
    "B22F 3/1039",
    "B22F 9/24",
    "C01B 31/02",
    "C01B 31/0253",
    "C01B 31/04",
    "C01B 31/0484",
    "C01B 31/065",
    "C01B 32/05",
    "C01B 32/168",
    "C01B 32/194",
    "C01B 32/21",
    "C01B 32/28",
    "C01G 3/02",
    "C04B 2235/425",
    "C04B 35/62805",
    "C04B 35/62889",
    "C22C 32/0094",
    "E04H 12/08",
    "E04H 12/2292",
    "F16B 5/10",
    "F16B 5/12"
  ],
  "ipc": [
    "B05D 7/00",
    "C01G 3/02",
    "C04B 35/628",
    "C22C 32/00"
  ],
  "assignees": [
    "LG Chem Ltd"
  ],
  "inventors": [
    "Woo-Ram Lee",
    "Sang-Ho Kim",
    "Jong-Wuk Park"
  ],
  "filing_date": "2011-08-03",
  "publication_date": "2017-10-03",
  "grant_date": "2017-10-03",
  "priority_date": "2009-02-05",
  "application_number": "US-201113197637-A",
  "family_id": "42281486",
  "cited_by_count": 0,
  "citations": [
    "US4113658A",
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    "JPH0913101A",
    "US6306795B1",
    "KR20050084099A",
    "CN1934281A",
    "WO2006082962A1",
    "US20070196641A1",
    "US20070144305A1",
    "CN101069928A",
    "KR20090009419A",
    "KR100869026B1",
    "WO2009014392A2",
    "KR20090012028A"
  ]
}