Structural, textural and adsorption characteristics of nanosilica mechanochemically activated in different media

V. M. Gun'ko, E. F. Voronin, L. V. Nosach, V. V. Turov, Z. Wang, A. P. Vasilenko, R. Leboda, J. Skubiszewska-Zieogoneba, W. Janusz, S. V. Mikhalovsky

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18 Citations (Scopus)

Abstract

The structural, textural, and adsorption characteristics of mechanochemically activated (MCA) fumed silica A-300 as dry or water, ethanol, or water/ethanol-wetted powders (0.5g of a solvent per gram of silica) in a ball mill for 1-6h were studied in comparison with those of the initial powder. The MCA treatment enhances bulk density (ρb) of the powder (from 0.045g/cm3 for the initial silica to 0.4g/cm3 for 6h-MCA-treated water-wetted silica) depending on medium type and MCA time (tMCA). Stronger effects are observed for the MCA treatment of water-wetted silica than of dry or ethanol- or water/ethanol-wetted samples. The MCA treatment weakly affects the specific surface area (SBET). However, void (pore) size distribution, porosity, particle aggregation and size distribution in aqueous suspension, behavior of interfacial water, properties of poly(vinyl alcohol)/silica composites and adsorption of gelatin depend more strongly on the tMCA and ρb values. Some of the observed changes in the characteristics (e.g., gelatin adsorption) depend on the ρb value but are independent of the medium type used on the MCA. Other characteristics are nonlinear functions of both tMCA and ρb values.

Original languageEnglish
Pages (from-to)300-311
Number of pages12
JournalJournal of Colloid and Interface Science
Volume355
Issue number2
DOIs
Publication statusPublished - Mar 15 2011

Keywords

  • Aqueous suspension
  • Fumed silica
  • Gelatin adsorption
  • Interfacial water behavior
  • Mechanochemical activation
  • PVA/silica film
  • Particle size distribution
  • Textural characteristics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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  • Cite this

    Gun'ko, V. M., Voronin, E. F., Nosach, L. V., Turov, V. V., Wang, Z., Vasilenko, A. P., Leboda, R., Skubiszewska-Zieogoneba, J., Janusz, W., & Mikhalovsky, S. V. (2011). Structural, textural and adsorption characteristics of nanosilica mechanochemically activated in different media. Journal of Colloid and Interface Science, 355(2), 300-311. https://doi.org/10.1016/j.jcis.2010.12.008