【摘要】 采用氩电弧等离子体法制备不同粒径的炭包铜纳米粒子,研究其抗氧化性能、在水介质中的分散性能和导热性能。结果表明:炭层的保护作用赋予铜晶体更高的抗氧化性能;非晶炭层的特殊结构可通过双氧水化学处理使其表面产生羧基和羟基,提高其在水介质中的分散性能;炭包铜粒径越小,纳米流体导热性能越好。更多还原

【Abstract】 Carbon-encapsulated copper nanoparticles(CCNPs) were synthesized by a carbon arc discharge of a copper and carbon mixture and their oxidation resistance in oxygen,dispersion in water and thermal conductivity as fluids were investigated.Results indicated that amorphous carbon made the nanocopper particles more resistive to oxidation.The carboxyl and hydroxyl groups in the outer sphere of the carbon-encapsulated copper improve the dispersion of CCNPs in water after a chemical treatment with H2O2.The smaller the CCNP particle size,the better the thermal conductivity of the fluid.更多还原