Heat exchange member and manufacturing method thereof

Abstract

A heat exchange member with excellent heat dissipation and electrical performance, and a method for manufacturing the same, are disclosed. The method includes: (1) producing a dispersion by adding a carbon material selected from carbon nanotubes, carbon nanofibers, graphene, or a mixture thereof into a solvent and subjecting it to a first ultrasonic irradiation; (2) supporting metal nanoparticles on the carbon material by adding a metal compound to the dispersion and performing a second ultrasonic irradiation to reduce the metal compound and generate the nanoparticles; and (3) forming a porous layer on a surface of a substrate by electroplating, using the nanoparticle-supported carbon dispersion as an electrolytic solution, with the substrate as a cathode and the metal as an anode. The porous layer comprises the nanoparticle-supported carbon material as a void-forming component and a metal material of the same type as the nanoparticles.

What is claimed is: 
     
         1 . A heat exchange member comprising:
 a substrate; and   a porous plated layer on a surface of the substrate, the porous plated layer comprising:   (a) a void-forming composite including a carbon material selected from a group consisting of carbon nanotubes, carbon nanofibers, graphene, and combinations thereof, the carbon material supporting metal nanoparticles; and
 (b) a metal deposit comprising the same element as the metal nanoparticles. 
   
     
     
         2 . The heat exchange member according to  claim 1 , wherein the porous layer formed from the void-forming material and the metal deposit is a plating layer formed on the surface of the substrate by electroplating. 
     
     
         3 . The heat exchange member according to  claim 1 , wherein the metal of the nanoparticles in (a) and the metal deposit in (b) are each independently selected from a group consisting of Ag, Au, Cu, Pt, and Pd. 
     
     
         4 . The heat exchange member according to  claim 2 , wherein the carbon material is a mixture of a plurality of materials selected from carbon nanotube, carbon nanofiber, and graphene. 
     
     
         5 . The heat exchange member according to  claim 3 , wherein the substrate includes a heat dissipation fin. 
     
     
         6 . The heat exchange member according to  claim 3 , wherein the substrate is a metal foil. 
     
     
         7 . A method of manufacturing a heat exchange member, comprising:
 producing a dispersion by adding a carbon material selected from the group consisting of carbon nanotubes, carbon nanofibers, graphene, and combinations thereof to a solvent and subjecting the dispersion to ultrasonic cavitation;   generating metal nanoparticles by introducing a metal compound providing metal ions, the compound being selected from oxides, salts, or complexes into the dispersion and reducing the metal ions under ultrasonic cavitation in the presence of a reducing agent, thereby supporting the metal nanoparticles on the carbon material; and   electroplating a substrate as a cathode using the dispersion as an electrolytic bath while supplying a metal-ion solution of the same element as the nanoparticles from an anode or an external source, thereby forming on the substrate a porous plated layer comprising the carbon material supporting the metal nanoparticles and a co-deposited metal deposit comprising the same element ultrasonic cavitation.   
     
     
         8 . The manufacturing method of the heat exchange member according to  claim 7 , wherein the solvent of the dispersion is one or more selected from water, ethanol, isopropanol, and ethylene glycol. 
     
     
         9 . The manufacturing method of the heat exchange member according to  claim 7 , wherein the process of producing the metal nanoparticle includes adding a metal ion in the dispersion. 
     
     
         10 . The manufacturing method of the heat exchange member according to  claim 7 , wherein a surfactant is added to the dispersion. 
     
     
         11 . The manufacturing method of the heat exchange member according to  claim 7 , wherein a reducing agent is added to the dispersion. 
     
     
         12 . The manufacturing method of the heat exchange member according to  claim 7 , wherein the metal nanoparticle and the metal deposit are each independently selected from a group consisting of silver, gold, copper, platinum, and palladium. 
     
     
         13 . The manufacturing method of the heat exchange member according to  claim 12 , wherein the carbon material is a mixture of a plurality of materials selected from carbon nanotube, carbon nanofiber, and graphene.