摘要
引言
氧化钇独特的4f电子层结构,使其具有了诸多的优良性能。在催化、陶瓷、光学玻璃、荧光、涂料等领域得到了广泛的应用。作为润滑油添加剂,其抗磨减摩效果明显,抗磨润滑性能卓越,潜在发展空间较大。
Nano-Y2O3 was prepared by the precipitation method with polyvinyl alcohol as dispersant,and the nano-Y2O3 was modified by stearic acid.Surface morphology,microstructure and lipophilic performance of nano-Y2O3 and modified nano-Y2O3 were characterized by XRD,IR,TG-DTA and TEM.The results showed that the phase and grain size of Y2O3 did not change after modification,and a covalent bond was formed between the hydroxyl of Y2O3 surface and carboxyl of stearic acid.An organic coating was formed on nano-Y2O3 and the polarity of nano-Y2O3 was changed from hydrophilicity to hydrophobicity.The lipophilic degree of modified nano-Y2O3 powder was up to 70.79%,under the condition of mass ratio of nano-Y2O3 to stearic acid 10∶2,pH 6.0 and modification time 120 min.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2011年第3期880-885,共6页
CIESC Journal
基金
广东省211学科建设项目~~
关键词
纳米氧化钇
改性
硬脂酸
亲油化度
nano-Y2O3
modification
stearic acid
lipophilic degree
