采用湿法对纳米二氧化铈进行改性.研究了纳米CeO2表面改性的影响因素,通过正交实验确定了最优改性剂和改性条件.改性剂硬脂酸的质量分数为6％、pH为8、改性温度为70 ℃、改性时间为1.5h时,改性后的纳米CeO2的亲油化度达到73.0％.结果表明,改性后的纳米二氧化铈粉体能够较好地分散于甲醇中,改性前后平均粒径大小变化不大,由TEM观察到团聚现象明显降低.%The CeO2 sample was modified by the wet chemical method. The surface modification of nanometer cerium oxide power and the effect factors were studied; the optimum modifying agent and condition were found. Through orthogonal experiment, the optimum reaction conditions were obtained with; the amount of the stearic acid was 6%, pH was 8, the modified temperature was 70℃, modified time was 1. 5 h. Using as modifying agent in the optimum condition, the lipophiiic degree of modified nanometer CeO2 is 73. 0%. Experimental results that nanometer cerium oxide powders are well dispersed after modification, the average particle size is little change before and after and agglomeration is significantly reduced.
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