On the universal growth of two-dimensional aggregates of hydrophobed glass beads formed at the (aqueous solution of electrolyte)-air interfaces

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Abstract

Two-dimensional aggregation of surface-modified glass beads was carried out at water (aqueous solution of electrolyte)-air interfaces. The effects of particle hydrophobicity and electrolyte concentration on the structure of the forming aggregates and on the growth process were investigated. The growth was characterized by density functions which demonstrate the change in mean particle number density as a function of aggregate size. The aggregation yielded fractal or non-fractal structures, depending on aggregate size. The fractal character for small aggregates was found to be dependent on particle hydrophobicity as well as on electrolyte concentration. However, above a certain electrolyte concentration, where restructuring of the growing aggregates was hindered slightly, practically the same values of fractal dimensions were obtained for investigated systems having different hydrophobicities. This result was attributed to the universal aspect of two-dimensional growth.

Original languageEnglish
Pages (from-to)207-216
Number of pages10
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume84
Issue number2-3
DOIs
Publication statusPublished - May 11 1994

Fingerprint

beads
Electrolytes
electrolytes
aqueous solutions
Glass
Hydrophobicity
hydrophobicity
glass
air
Air
fractals
Fractals
Agglomeration
Fractal dimension
Probability density function
Water
water

Keywords

  • Colloid and capillary interactions
  • Equilibrium and non-equilibrium structures
  • Interfacial aggregation of solid particles
  • Universal fractal growth
  • Wettability

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

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title = "On the universal growth of two-dimensional aggregates of hydrophobed glass beads formed at the (aqueous solution of electrolyte)-air interfaces",
abstract = "Two-dimensional aggregation of surface-modified glass beads was carried out at water (aqueous solution of electrolyte)-air interfaces. The effects of particle hydrophobicity and electrolyte concentration on the structure of the forming aggregates and on the growth process were investigated. The growth was characterized by density functions which demonstrate the change in mean particle number density as a function of aggregate size. The aggregation yielded fractal or non-fractal structures, depending on aggregate size. The fractal character for small aggregates was found to be dependent on particle hydrophobicity as well as on electrolyte concentration. However, above a certain electrolyte concentration, where restructuring of the growing aggregates was hindered slightly, practically the same values of fractal dimensions were obtained for investigated systems having different hydrophobicities. This result was attributed to the universal aspect of two-dimensional growth.",
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author = "Z. H{\'o}rv{\"o}lgyi and M. M{\'a}t{\'e} and M. Zr{\'i}nyi",
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T1 - On the universal growth of two-dimensional aggregates of hydrophobed glass beads formed at the (aqueous solution of electrolyte)-air interfaces

AU - Hórvölgyi, Z.

AU - Máté, M.

AU - Zrínyi, M.

PY - 1994/5/11

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N2 - Two-dimensional aggregation of surface-modified glass beads was carried out at water (aqueous solution of electrolyte)-air interfaces. The effects of particle hydrophobicity and electrolyte concentration on the structure of the forming aggregates and on the growth process were investigated. The growth was characterized by density functions which demonstrate the change in mean particle number density as a function of aggregate size. The aggregation yielded fractal or non-fractal structures, depending on aggregate size. The fractal character for small aggregates was found to be dependent on particle hydrophobicity as well as on electrolyte concentration. However, above a certain electrolyte concentration, where restructuring of the growing aggregates was hindered slightly, practically the same values of fractal dimensions were obtained for investigated systems having different hydrophobicities. This result was attributed to the universal aspect of two-dimensional growth.

AB - Two-dimensional aggregation of surface-modified glass beads was carried out at water (aqueous solution of electrolyte)-air interfaces. The effects of particle hydrophobicity and electrolyte concentration on the structure of the forming aggregates and on the growth process were investigated. The growth was characterized by density functions which demonstrate the change in mean particle number density as a function of aggregate size. The aggregation yielded fractal or non-fractal structures, depending on aggregate size. The fractal character for small aggregates was found to be dependent on particle hydrophobicity as well as on electrolyte concentration. However, above a certain electrolyte concentration, where restructuring of the growing aggregates was hindered slightly, practically the same values of fractal dimensions were obtained for investigated systems having different hydrophobicities. This result was attributed to the universal aspect of two-dimensional growth.

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KW - Equilibrium and non-equilibrium structures

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