中山大学学报（自然科学版）Issue(5)：79-84,6.
油酸双层包覆Fe3O4磁性颗粒的羧基质子化亲油改性研究
Study on Protonated Lipophilic Modification of Oleic Acid Bilayer-Coated Fe3 O4 Magnetic Particles
摘要
Abstract
In this work,spinel Fe3 O4 magnetic nano particles were synthesized by chemical co-precipita-tion method.The excess oleic acid was added during the initial stage of the reaction to prepare water-based ferrofluid under an alkaline condition.Subsequently,a novel and facile modified method were pro-posed by adding hydrochloric acid to adjust pH value or adding ethanol to successfully change the bilayer-coated hydrophilic particles to hydrophobic ones.The coated particles were characterized by Fourier infra-red spectrometer (FTIR),thermogravimetry analyzer (TG),transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM).The results showed that the prepared water-based ferrofluid had the formation of inner layer chemical and outer layer physical adsorption by oleic acid and the particles' bilayer-coated structure was maintained by the acid modification through protonating the termi-nal carboxyl group,which had the maximum weight loss rate.The bilayer-coated Fe3 O4 particles were monodispersed in hexane indicated in TEMimage.The stability of the ferroluid was much better than that of single coated particles because of the space steric effects'promotion caused by the bilayer-coated struc-ture.关键词
质子化改性/双层包覆/Fe3 O4纳米颗粒/油酸/正己烷磁流体Key words
protonated modification/bilayer coated/Fe3 O4 nano particles/oleic acid/hexane ferrofluid分类
化学化工引用本文复制引用
陈明洁,沈辉,白路,陈宝仪,潘权生..油酸双层包覆Fe3O4磁性颗粒的羧基质子化亲油改性研究[J].中山大学学报（自然科学版）,2014,(5):79-84,6.基金项目
广东省科技计划资助项目 （）
