PDF全文下载：2017020071
陈雨露，李冬，苏明，郭小松，郝春成*
（青岛科技大学材料科学与工程学院，山东青岛266042)
摘要:以SiO2为模板，钛酸丁酯为钛源，NaOH为刻蚀剂，模板法结合溶胶凝胶法及部分刻蚀工艺成功制备了单分散蛋黄状SiO2/TiO2核壳复合微球，并以其作为电流变液的分散相材料研究分散相颗粒结构的转变对电流变性能的影响。通过X-射线衍射仪，扫描电子显微镜和透射电子显微镜表征手段，探讨了蛋黄状SiO2/TiO2核壳复合微球的逐步形成过程。电流变测试结果表明，蛋黄状SiO2/TiO2电流变液的电流变效应随着SiO2内核尺寸的减小而提高，这主要是由密度变小的分散相颗粒在电场中提高的电场力所致。详细探讨了分散相颗粒密度，沉降稳定性与电流变性能三者之间的关系。结果发现：分散相颗粒密度越低，沉降稳定性越好，电流变性能更佳。
关键词: SiO2/TiO2微球; 蛋黄结构； 电流变性能； 抗沉降性
中图分类号：TQ 134.1+1文献标志码：A
引用格式：陈雨露，李冬，苏明，等.单分散蛋黄状SiO2/TiO2球的制备及其电流变性能\[J\].青岛科技大学学报（自然科学版），2017，38（2）：71-77.
CHEN Yulu, LI Dong, SU Ming,et al.Preparation of monodisperse SiO2/TiO2 york-shell nanospheres and their electrorheological performance \[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition),2017,38(2)：71-77.
Preparation of Monodisperse SiO2/TiO2 York-shell Nanospheres and Their Electrorheological Performance
CHEN Yulu, LI Dong, SU Ming, GUO Xiaosong, HAO Chuncheng
(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: Using SiO2 as templates, tetrabutyl titanate as titanium source, NaOH as etching agent, york-shell SiO2/TiO2 nanospheres (YSNS) had been successfully synthesized via a conventional templating method which combined sol-gel coating and partial etching processes.The gradually forming process of york-shell SiO2/TiO2 nanospheres were characterized by X-ray diffraction (XRD), scanning electron microscope(SEM) and transmission electron microscopy (TEM). The electrorheological（ER） results showed that the ER performance of the YSNS-based ER fluid prominently enhanced with the decrease of SiO2 core size, which were attributed to the enhancement of electric field force between low density dispersing particles. The relationships between density of disperse particles, sendimentation stability and ER properties were discussed in detail.The lower the density of disperse particlesis,the better the sedimentation stability and the ER propertiesis.
Key words:SiO2/TiO2 nanospheres; york-shell structure; ER performance; sendimentation stability
收稿日期：2015-09-18
基金项目：国家自然科学基金青年基金项目（51407098）；山东省自然科学基金项目（ZR2014EEM006）；山东省优秀中青年科学家科研奖励基金项目（BS2014CL018）；青岛市青年专项项目（14-2-4-50-jch）；山东省高等学校科技计划基金项目（J14LA14）.
作者简介：陈雨露（1991—），女，硕士研究生.*通信联系人.
文章编号：1672-6987（2017）02-0071-07；DOI：10.16351/j.1672-6987.2017.02.011
