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Adhesion between Colloidal Silica as Seen with Direct Force Measurement

✍ Scribed by David Atkins; Patrick Kékicheff; Olivier Spalla

Book ID
102579336
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
133 KB
Volume
188
Category
Article
ISSN
0021-9797

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✦ Synopsis

Direct force measurements are reconciled with the well-known anomalous colloidal behavior of silica sols. To overcome the difficulty of surface-altering treatments the force between layers of nanometric colloidal silica particles adsorbed from solution is measured using a surface force apparatus. Coating substrates with nanometric particles gives a surface that is smooth only at the nanometer scale, but which is fully representative of a colloidal silica-water interface. Force measurements and colloidal stability can thus be compared, leading to direct evidence of chemical adhesion between silica particles.

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Direct Measurement of Colloidal Forces between Mica and Silica in Aqueous Electrolyte
✍ Gary Toikka; Robert A. Hayes 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 422 KB

A refined methodology which allows attachment of submicrometer colloidal particles to atomic force microscopy cantilevers is described. The interactions between particles of this size and both mica and silica surfaces in aqueous electrolyte at pH 5.8 have been studied. The monotonic repulsive force