由于对涂料中填料密度的进一步要求,使得低密度的填料成为研究的热点.采用可控碳化技术制备了低密度的碳球并通过化学镀膜工艺将碳球表面金属化,制备了直径为0.1～2.0 μm,密度约为1.04 g/L,球面含碳11.52%,合镍75.17%的镍-碳纳微米球.结果表明,含有-OH,C=O,-CH活性基团的纳微米碳球对于改善碳球表面的亲水性能,提高微球在镀液中的分散性,促进球.液界面还原氢H吸附的形成,加速化学镀镍反应的进行起到了重要的作用.由此得到的镍碳球大大降低了填料的密度,使得填料在涂料中分散更加均匀.
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