Aqueous foams stabilized solely by silica nanoparticles

Angewandte Chemie - International Edition

Volumn 44, Issue 24, 2005, Pages 3722-3725

  Binks, Bernard P ^a   Horozov, Tommy S ^a  

^a UNIVERSITY OF HULL   (United Kingdom)

Author keywords

Foams; Interfaces; Nanostructures; Silica; Surface chemistry

Indexed keywords

ADSORPTION; HYDROPHOBICITY; IMAGE ANALYSIS; NANOSTRUCTURED MATERIALS; OPTICAL MICROSCOPY; SILICA;

AQUEOUS FOAMS; FOAM STABILITY; PARTICLE AGGREGATES; SILICA NANOPARTICLES;

FOAMS;

NANOMATERIAL; SILICON DIOXIDE; WATER;

ARTICLE; CHEMISTRY; HYDROPHOBICITY; PARTICLE SIZE; SURFACE PROPERTY;

HYDROPHOBICITY; NANOSTRUCTURES; PARTICLE SIZE; SILICON DIOXIDE; SURFACE PROPERTIES; WATER;

EID: 20444434017     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200462470     Document Type: Article

References (16)

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14. We anticipate that the fumed silica particles will aggregate in bulk and that the extent of aggregation may depend on the hydrophobicity of the particle and the concentration of the electrolyte. Whether discrete primary particles or aggregates of particles, or both, adsorb around air bubbles is not known, but work to determine this is in progress. One consequence of particle aggregation is the increased viscosity of the aqueous phase (gelling) which results in slower drainage of foam films and increased stability of the foam.
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16. Note added in proof: Since the submission of this article, a paper by Alargova et al. appeared which describes the stabilization of aqueous foams by micron-long polymer rod particles: R. G. Alargova, D. S. Warhadpande, V. N. Paunov, O. D. Velev, Langmuir 2004, 20, 10 371-10 374.