Nanocarbon/aluminum composite material, process for producing the same, and plating liquid for use in said process

Abstract

[Object] To provide a nanocarbon/aluminum composite material having high strength and electrical conductivity for suitable use in a lead wire, a heat exchanger and an automotive part and a process for producing the nanocarbon/aluminum composite material. [Solution] There is provided a plating liquid for nanocarbon/aluminum composite production, comprising an aluminum halide, nanocarbon and 1,3-dialkylimidazolium halide and/or the like, wherein the molar ratio of the aluminum halide to the 1,3-dialkylimidazolium halide and/or the like is in the range of 20:80 to 80:20 and the 1,3-dialkylimidazolium halide and/or the like has an alkyl group with a carbon number of 1 to 12. There are also provided a nanocarbon/aluminum composite production process comprising forming a plating film on a substrate surface by electrolysis of the plating liquid in a dry, oxygen-free atmosphere with the passage of a direct current etc. under the electrolysis conditions of a bath temperature of 0 to 300° C. and a current density of 0.01 to 50 A/dm 2 and a nanocarbon/aluminum composite material produced by this production process.

1 . A plating liquid for nanocarbon/aluminum composite production, comprising an aluminum halide, nanocarbon and 1,3-dialkylimidazolium halide and/or monoalkylpyridinium halide, wherein the molar ratio of the aluminum halide to the 1,3-dialkylimidazolium halide and/or the monoalkylpyridinium halide is in the range of 20:80 to 80:20; the 1,3-dialkylimidazolium halide has an alkyl group with a carbon number of 1 to 12; and the monoalkylpyridinium halide has an alkyl group with a carbon number of 1 to 12. 
   
   
       2 . The plating liquid for nanocarbon/aluminum composite production according to  claim 1 , wherein the nanocarbon is contained in an amount of 0.01 to 50 g/L with respect to the total volume of the aluminum halide and the 1,3-dialkylimidazolium halide and/or the monoalkylpyridinium halide. 
   
   
       3 . The plating liquid for nanocarbon/aluminum composite production according to  claim 1 , wherein the nanocarbon is at least one selected from the group consisting of carbon nanotube, carbon nanofiber, carbon nanohom, fullerene, carbon black, acetylene black and ketjen black. 
   
   
       4 . The plating liquid for nanocarbon/aluminum composite production according to  claim 3 , wherein the nanocarbon tube has a diameter of 1 to 100 μm, a length of 1 to 100 μm and an aspect ratio of 10 to 100. 
   
   
       5 . A process for preparing the plating liquid for nanocarbon/aluminum composite production according to  claim 1 , comprising: mixing aluminum halide and nanocarbon together, mixing the mixture of the aluminum halide and the nanocarbon with 1,3-dialkylimidazolium halide and/or monoalkylpyridinium halide, and then, melting the mixture of the aluminum halide, the nanocarbon and the 1,3-dialkylimidazolium halide and/or the monoalkylpyridinium halide; or mixing nanocarbon with 1,3-dialkylimidazolium halide and/or monoalkylpyridinium halide, mixing the mixture of the nanocarbon and the 1,3-dialkylimidazolium halide and/or the monoalkylpyridinium halide with aluminum halide, and then, melting the mixture of the aluminum halide, the nanocarbon and the 1,3-dialkylimidazolium halide and/or the monoalkylpyridinium halide. 
   
   
       6 . A process for preparing the plating liquid for nanocarbon/aluminum composite production according to  claim 1 , comprising: mixing aluminum halide and nanocarbon together or mixing nanocarbon with 1,3-dialkylimidazolium halide and/or monoalkylpyridinium halide, and then, mixing the nanocarbon mixture with a molten salt of aluminum halide and 1,3-dialkylimidazolium halide and/or monoalkylpyridinium halide. 
   
   
       7 . A process for producing a nanocarbon/aluminum composite material by using the plating liquid for nanocarbon/aluminum composite production according to  claim 1 , comprising: forming a plating film on a substrate surface by electrolysis of the plating liquid in a dry, oxygen-free atmosphere with the passage of a direct current and/or a pulsed current under the electrolysis conditions of a bath temperature of 0 to 300° C. and a current density of 0.01 to 50 A/dm 2 . 
   
   
       8 . A nanocarbon/aluminum composite material produced by the nanocarbon/aluminum composite material production process according to  claim 7 . 
   
   
       9 . The nanocarbon/aluminum composite material according to  claim 8 , wherein the nanocarbon content of the nanocarbon/aluminum composite material is in the range of 0.1 to 50%.