Preparation of spherical silicas in aliphatic hydrocarbons systems

• Autorzy: Tepper B. , Jesionowski T. , Krysztafkiewicz A.
• Języki publikacji: EN

Abstrakty

EN

Studies were performed on a group of highly dispersed silicas, formed using precipitation technique. The silicas were precipitated in an emulsion system from sodium metasilicate solution, using hydrochloric acid supplemented with emulsifiers and an appropriate amount of organic phase (cyclohexane, hexane, heptane, octane). The dispersion was induced using a homogenizer. The studies permitted to obtain SiO2 particles of optimum particle diameter and a defined spherical shape. For the obtained products, also the profiles of wettability and sedimentation in water were determined.

Słowa kluczowe

EN

precipitated silicas; aliphatic hydrocarbons; emulsions

PL

krzemionka strącana; węglowodory alifatyczne; emulsja

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2006
• Tom: Vol. 8, nr 3
• Strony: 48--50
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Tepper B.

autor

Jesionowski T.

autor

Krysztafkiewicz A.

• Institute of Chemical Technology and Engineering, Poznań University of Technology, ul. M. Skłodowskiej-Curie 2, 60-965 Poznań,

Bibliografia

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• (2) van Blaaderen A., van Gest J., Vrij A.: Colloidal silica spheres from tetraalkoxysilanes: particle formation and growth mechanism, J. Colloid Interf. Sci. 1992, 154, 481.
• (3) Jesionowski T., Krysztafkiewicz A.: Preparation of the hydrophilic/hydrophobic silica particles, Colloids Surf. A, 2002, 207, 49.
• (4) Jesionowski T., Krysztafkiewicz A.: Influence of silane coupling agents on surface properties of precipitated silicas, Appl. Surf. Sci., 2001, 172, 18.
• (5) J. Esquena, R. Pons, N. Azemar, J. Solans: Preparation of monodisperse silica particles in emulsion media, Colloids Surf. A, 1997, 123 - 124, 575.
• (6) H. Giesche: Synthesis of monodispersed silica powders I Particle properties and reactions kinetics, J. Europ. Ceram. Soc, 1994, 14, 189.
• (7) Jesionowski T.: Effect of surfactants on the size and morphology of the silica particles prepared by an emulsion technique, J. Mater. Sci., 2002, 37, 5275.