中文摘要：

以醋酸锌、氢氧化钠、硬脂酸为原料,采用机械化学法,一步制备出具有表面亲油性能的氧化锌粉体。借助XRD、FTIR、TEM、纳米粒度测试等方法对粉体进行了表征,研究了硬脂酸对氧化锌粉体表面改性的机理。结果表明,硬脂酸中的羧基与氧化锌颗粒表面的羟基发生了酯化反应,并在表面形成有机膜,氧化锌粉末由亲水性转化为亲油性。当球磨时间为50 min、硬脂酸加入量为氧化锌质量的4.5%时,可以得到平均粒度为90 nm的亲油性氧化锌粉体。

英文摘要：

Zinc oxide nanopowder with hydrophobic surface was synthesised by mechanochemical reaction using zinc acetate sodium hydroxide and stearic acid as raw materials.The modification mechanism of stearic acid on the surface property of ZnO was studied using XRD,FT-IR,TEM and particle size measurement.The experiment results show that an organic film was formed through covalent bond between the carboxyl of stearic acid and hydroxylic on the ZnO surface.The surface property of ZnO nanopowder was changed from hydrophilic to hydrophobic coated with a monomolecular layer of aliphatic chains.When the milling time is 50 min and the mass content of stearic acid in ZnO 4.5%,the ZnO nanopowder with optimal modification effect can be achieved.