Preparation of hollow silica nanospheres in reverse liquid-liquid dispersions

DOI

Bibliographic Information

Other Title
  • 逆相液液分散系におけるシリカ中空ナノスフィアの調製

Description

Hollow silica nanospheres were prepared through the sol-gel process of silicon tetramethoxide in reverse liquid-liquid dispersions. Sorbitan trioleate and/or sodium bis(2-ethylhexyl)sulfosuccinate (AOT) were dissolved at 10 wt% in cyclohexane to prepare an oil phase. Citric acid aqueous solution at a pH of 5.0 was used as an aqueous phase. When the aqueous phase at a volume fraction of 0.01 was mixed with the oil phase at AOT concentrations of 60 mass% and less, reverse emulsions were formed. The products were more than 200 nm in size with wide size distribution. The solubilization was observed at AOT concentrations of 70 mass% and more. The products were recognized to be hollow nanospheres, of which the size was ranged from 20 to 30 nm and the wall thickness was ca. 5 nm. Such an almost uniform size suggests that the nanospheres have been produced at the reverse micelles as the reaction site.

Journal

Details 詳細情報について

  • CRID
    1390001205621870976
  • NII Article ID
    130006981899
  • DOI
    10.14853/pcersj.2012s.0.433.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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