Reversing Gels and Water Soluble Colloids from Aminosiloxanes

T. Suratwala, K. Davidson, Z. Gardlund, D. Collins, Donald R Uhlmann

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The unique sol/gel behavior of an organic/inorganic hybrid material synthesized from 3-aminopropyltriethoxysilane (3AS) and tetramethoxysilane (TMOS) is discussed and examined. The addition of H2O to a mixture of a basic (3AS) and an acidic (TMOS) alkoxide leads to rapid gel formation. This wet gel reverses to a sol upon heating which is attributed to the dissolution of siloxane bonds between the surfaces of colloidal particles in the gel. The reversed sol dries to an optically transparent solid which is water soluble. The water solubility and the stability of these colloidal particles are described by their aminopropyl/silanol surface and the electrostatic interactions between them using DLVO theory.

Original languageEnglish (US)
Pages (from-to)553-558
Number of pages6
JournalJournal of Sol-Gel Science and Technology
Volume13
Issue number1-3
StatePublished - 1999

Fingerprint

reversing
Colloids
colloids
Gels
gels
Polymethyl Methacrylate
Sols
Water
water
Siloxanes
Hybrid materials
Coulomb interactions
Particles (particulate matter)
Sol-gels
siloxanes
alkoxides
Dissolution
Solubility
Heating
dissolving

Keywords

  • 3-aminopropyltriethoxysilane
  • Colloids
  • DLVO theory
  • Reversible gel
  • Tetramethoxysilane
  • Water soluble silica

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Suratwala, T., Davidson, K., Gardlund, Z., Collins, D., & Uhlmann, D. R. (1999). Reversing Gels and Water Soluble Colloids from Aminosiloxanes. Journal of Sol-Gel Science and Technology, 13(1-3), 553-558.

Reversing Gels and Water Soluble Colloids from Aminosiloxanes. / Suratwala, T.; Davidson, K.; Gardlund, Z.; Collins, D.; Uhlmann, Donald R.

In: Journal of Sol-Gel Science and Technology, Vol. 13, No. 1-3, 1999, p. 553-558.

Research output: Contribution to journalArticle

Suratwala, T, Davidson, K, Gardlund, Z, Collins, D & Uhlmann, DR 1999, 'Reversing Gels and Water Soluble Colloids from Aminosiloxanes', Journal of Sol-Gel Science and Technology, vol. 13, no. 1-3, pp. 553-558.
Suratwala, T. ; Davidson, K. ; Gardlund, Z. ; Collins, D. ; Uhlmann, Donald R. / Reversing Gels and Water Soluble Colloids from Aminosiloxanes. In: Journal of Sol-Gel Science and Technology. 1999 ; Vol. 13, No. 1-3. pp. 553-558.
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