采用硝酸(1:1)对碳纳米管进行氧化纯化处理,然后采用~(60)Co γ射线辐照,引发丙烯酸单体在碳纳米管表面发生自由基加成、聚合反应,对碳纳米管表面进行表面改性,所得碳纳米管在水溶液中有良好的分散性.红外光谱证实C(=0)一H、C-OH等基团接枝到碳纳米管表面,表面改性前后的碳纳米管表面增强拉曼光谱(SERS)也存在显著差异.SEM研究结果表明,改性后的碳纳米管表面可以直接镀上连续、均匀的纳米铜颗粒,实现良好的异质连接.谢乐公式计算出铜晶粒平均大小为44.298 nm.
Carbon nanotubes were oxidized and purified with nitric acid (1:1). Then radical addition and polymerization of acrylic monomer was reacted on the carbon nanotubes' (CNTs) surface, which was initiated by~(60) Co γ ray irradiation. The FT-IR apectra showed that the active groups C(= O)- H, C - OH were grafted on the CNTs' surface, and the surface enhanced Raman spectra (SERS) also indicated the remarkable difference between the original and modified CNTs. It was found that the CNTs modified with a-crylic acid could be dispersed in water easily. By means of scanning electron microscopy (SEM), deposition of copper nano-particles on the modified carbon nanotubes' surface was continuous and homogeneous, with a better heterogeneous connection between copper nano-particles and CNTs. The copper grain size was 44.298 nm by Scherer formula.
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