화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.56, 203-211, December, 2017
DOI10.1016/j.jiec.2017.07.013  Export Citation
Cactus-like double-shell structured SiO2@TiO2 microspheres: Fabrication, electrorheological performances and microwave absorption
Xuqiang Ji, Wenling Zhang†, Wenpeng Jia1, Xiaoxia Wang, Yu Tian1, Li Deng, and Jingquan Liu†
  • College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Laboratory of Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Collaborative Innovation Centre for Marine Biomass Fibers, Qingdao University, Qingdao 266071, China
  • 1State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
E-mail:,
The cactus-like double-shell structured SiO2@TiO2 microspheres (CDS SiO2@TiO2 microspheres) with high dielectric properties were successfully fabricated and utilized as high-performance electrorheological (ER) fluids and microwave absorbing materials. The SiO2 nanospheres with average diameters of 190 nm were synthesized by the hydrolysis of tetraethyl orthosilicate (TEOS), and used as the core for the first coating layer of TiO2 achieved by sol-gel method. The final cactus-like TiO2 layer was prepared via a hydrothermal method. The morphology of the resultant samples was characterized via transmission electron microscopy (TEM), scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM). This novel CDS SiO2@TiO2 microspheres based suspension exhibited improved ER properties compared to conventional bare SiO2 spheres.
Keywords:Double-shell;Cactus-like;TiO2;Electrorheology;Electromagnetic wave attenuation
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