Preparations of polystyrene/aluminum hydroxide and polystyrene/alumina composite particles in an ionic liquid |
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Authors: | Kinoshita Keigo Minami Hideto Tarutani Yasunori Tajima Kimitaka Okubo Masayoshi Yanagimoto Hiroshi |
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Affiliation: | Graduate School of Engineering, Kobe University, Rokko, Nada, Kobe 657-8501, Japan. |
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Abstract: | Polystyrene (PS)/aluminum hydroxide (Al(OH)(3)) composite particles were successfully prepared by the sol-gel process of aluminum isopropoxide (Al(OPr(i))(3)) in a hydrophilic ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF(4)]) using ammonium hydroxide (NH(4)OH) as a catalyst in the presence of PS seed. Transmission electron microscopy observation of ultrathin cross-sections of the composite particles revealed that the composite particles had a core-shell morphology consisting of a PS core and a Al(OH)(3) shell having high crystallinity. The amount of secondary nucleated Al(OH)(3) could be reduced by dropwise addition of NH(4)OH. Moreover, PS/η-Al(2)O(3) composite particles were successfully prepared by heat treatment of PS/Al(OH)(3) at 300 °C in N(2) atmosphere, which is below the decomposition temperature of PS. |
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