Shear-Induced Restructuring of Colloidal Silica Gels

Shear-Induced Restructuring of Colloidal Silica Gels

Continuous oscillatory experiments were used to investigate the viscoelastic properties and structural evolution of silica gels obtained from unsheared and presheared sols, at pH 8. The processes controlling structural evolution before, at and after the gel point are discussed. Although the viscoela...

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Veröffentlicht in:Journal of sol-gel science and technology 2000-12, Vol.19 (1-3), p.279-283
Hauptverfasser: Drabarek, E, Bartlett, J R, Hanley, HJM, Woolfrey, J L, Muzny, C D, Butler, B D
Format: Artikel
Sprache:eng
Schlagworte:
Chemical properties
Crosslinking
Evolution
Gelation
Organic chemistry
Silica gel
Silicon dioxide
Sols
Viscoelasticity
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Beschreibung
Zusammenfassung:Continuous oscillatory experiments were used to investigate the viscoelastic properties and structural evolution of silica gels obtained from unsheared and presheared sols, at pH 8. The processes controlling structural evolution before, at and after the gel point are discussed. Although the viscoelastic properties of the aged gels are comparable (implying similar structures on length scales of several microns), their chemical properties and microstructures (
ISSN:0928-0707
1573-4846
DOI:10.1023/A:1008765111690