Colloid and Polymer Science

, Volume 269, Issue 1, pp 43–48

The pH dependence of dispersion of TiO2 particles in aqueous surfactant solutions

  • T. Imae
  • K. Muto
  • S. Ikeda
Colloid Science


The pH dependence of dispersion of titanium dioxide (TiO2) particles has been examined in the presence of surfactant molecules in water. Whereas particles were dispersed in water at acid and alkaline regions rather than at neutral region, the dispersion was enhanced at neutral region in an aqueous sodium dodecyl sulfate (SDS) solution and at acid and alkaline regions in an aqueous dodecyldimethylamine oxide (C12DAO) solution. Considering the pH dependence of zeta potential, the adsorption models of surfactant molecules on a particle were estimated on the basis of the modes of hemimicelle and double-layer compression. While the particles that adsorbed Al3+ were remarkably dispersed around pH 6, their dispersion does not largely depend on pH in the addition of SDS, indicating the adsorption of SDS molecules to form double-layer compression in the whole pH region. Dynamic light-scattering measurement and electron microscopic observation suggested that the particles were dispersed in water as small flocs.

Key words

TiO2particledispersion aqueoussurfactantsolution electrostaticattractiveinteraction physicaladhesiveinteraction lateralhydrophobicinteraction hemimicelle doublelayercompression 


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  1. 1.
    Mpandou A, Siffert B (1984) J Colloid Interface Sci 102:138Google Scholar
  2. 2.
    Somasundaran P, Healy TW, Fuerstenau DW (1964) J Phys Chem 68:3562Google Scholar
  3. 3.
    Scamehorn JF, Schechter RS, Wade WH (1982) J Colloid Interface Sci 85:1982Google Scholar
  4. 4.
    Hayashi S, Ikeda S (1980) J Phys Chem 84:744Google Scholar
  5. 5.
    Abe A, Imae T, Shibuya A, Ikeda S (1988) J Surface Sci Technol 4:67Google Scholar
  6. 6.
    Meguro K (1955) Kogyo Kagaku Zassi 58:905Google Scholar
  7. 7.
    Maeda H, Tsunoda M, Ikeda S (1974) J Phys Chem 78:1086Google Scholar

Copyright information

© Steinkopff-Verlag 1991

Authors and Affiliations

  • T. Imae
    • 1
  • K. Muto
    • 1
  • S. Ikeda
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceNagoya UniversityNagoyaJapan

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