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Preparation and surface encapsulation of hollow TiO nanoparticles for electrophoretic displays
Authors:Qian ZhaoTingfeng Tan  Peng QiShirong Wang  Shuguang BianXianggao Li  Yong AnZhaojun Liu
Institution:a School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
b Department of Materials Science & Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China
c The High Technology Research and Development Center, The Ministry of Science and Technology, Beijing 100044, China
Abstract:Hollow black TiO nanosparticles were obtained via deposition of inorganic coating on the surface of hollow core-shell polymer latex with Ti(OBu)4 as precursor and subsequent calcination in ammonia gas. Hollow TiO particles were characterized by scanning electron microscope, transmission electronic microscopy, X-ray diffraction, and thermogravimetric analysis. Encapsulation of TiO via dispersion polymerization was promoved by pretreating the pigments with 3-(trimethoxysilyl) propyl methacrylate, making it possible to prepare hollow TiO-polymer particles. When St and DVB were used as polymerization monomer, hollow TiO-polymer core-shell particles came into being via dispersion polymerization, and the lipophilic degree is 28.57%. Glutin-arabic gum microcapsules containing TiO-polymer particles electrophoretic liquid were prepared using via complex coacervation. It was founded that hollow TiO-polymer particles had enough electrophoretic mobility after coating with polymer.
Keywords:Hollow TiO nanoparticles  Surface encapsulation  Electrophoretic properties  Microcapsules
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