摘要
采用十二烷基磺酸钠(SDS)对纳米CeO2粉体进行表面改性以提高其在有机材料中的分散性,以活化指数表征改性效果,并用IR、TG-DSC、TEM和LPSA表征了改性纳米CeO2的效果和结构。结果表明,最佳改性工艺条件为:十二烷基磺酸钠用量4%,反应温度70℃,反应时间6h,pH=7。SDS以化学键合的方式吸附在纳米CeO2的表面,并形成了有机包覆层,经SDS改性过的纳米CeO2的分散性明显提高,粒度降低44%。
Surface modification with sodium dodecyl sulfate （SDS） on nano-CeO2 was achieved in order to improve the dispersibility of nano-CeO2 in organic materials. The modification effect characterized by the activation index and structure were described by IR, TG-DSC, TEM and LPSA. The results show that the optimum modification conditions including SDS dosage of 4 %, reaction temperature of 70 ℃, reaction time of 6 h and pH=7. SDS is adsorbed on the surface of nano-CeO2 with chemical bond and formed organic coating. The dispersibility of nano-CeO2 modified with SDS is obviously improved, and the granularity is reduced 44 %.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2012年第10期46-49,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
国家杰出青年基金项目(51025416)
关键词
纳米CEO2
表面改性
十二烷基磺酸钠
活化指数
nano-CeO2
surface modification
sodium dodecyl sulfate （SDS）
activation index
