Reversing Gels and Water Soluble Colloids from Aminosiloxanes

T. Suratwala; K. Davidson; Z. Gardlund; D. Collins; D. R. Uhlmann

doi:10.1023/a:1008674723646

Reversing Gels and Water Soluble Colloids from Aminosiloxanes

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

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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 language	English (US)
Pages (from-to)	553-558
Number of pages	6
Journal	Journal of Sol-Gel Science and Technology
Volume	13
Issue number	1-3
DOIs	https://doi.org/10.1023/a:1008674723646
State	Published - Jan 1998

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Biomaterials
Condensed Matter Physics
Materials Chemistry

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10.1023/a:1008674723646

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title = "Reversing Gels and Water Soluble Colloids from Aminosiloxanes",

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.",

keywords = "3-aminopropyltriethoxysilane, Colloids, DLVO theory, Reversible gel, Tetramethoxysilane, Water soluble silica",

author = "T. Suratwala and K. Davidson and Z. Gardlund and D. Collins and Uhlmann, {D. R.}",

year = "1998",

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publisher = "Springer Netherlands",

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TY - JOUR

T1 - Reversing Gels and Water Soluble Colloids from Aminosiloxanes

AU - Suratwala, T.

AU - Davidson, K.

AU - Gardlund, Z.

AU - Collins, D.

AU - Uhlmann, D. R.

PY - 1998/1

Y1 - 1998/1

N2 - 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.

AB - 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.

KW - 3-aminopropyltriethoxysilane

KW - Colloids

KW - DLVO theory

KW - Reversible gel

KW - Tetramethoxysilane

KW - Water soluble silica

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ER -

Reversing Gels and Water Soluble Colloids from Aminosiloxanes

Abstract

Keywords

ASJC Scopus subject areas

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