Small angle X-ray scattering of hydrophilic and hydrophobic SiO2 particles

Imre Dékány, László Turi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Small angle X-ray scattering of hydrophilic (Aerosil 200) and hydrophobic (Aerosil R972) SiO2 particles was studied by a compact Kratky camera in He atmosphere. The scattering intensity functions of the hydrophilic and hydrophobic colloid particles are not very different; however, the primary intensity I(o) is considerably larger for hydrophobic particles. The effect of hydrophobization is well demonstrated by the representation of the experimental data according to the Debye-Bueche function. From this function the correlation length l(c), the tail end constant K(p) the invariant M1, and the specific surface area of the powder can be calculated. The scattering functions also yield the surface fractal dimension of the silica particles.

Original languageEnglish
Pages (from-to)59-66
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume126
Issue number1
DOIs
Publication statusPublished - Jun 13 1997

Keywords

  • Hydrophilic and hydrophobic SiO particles
  • Small angle X-ray scattering

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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