Viscoelasticity in silica gel

George W. Scherer; Sandra A. Pardenek; Rose M. Swiatek

doi:10.1016/0022-3093(88)90086-5

Viscoelasticity in silica gel

George W. Scherer, Sandra A. Pardenek, Rose M. Swiatek

Civil & Environmental Engineering

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64 Scopus citations

Abstract

The elastic modulus, modulus of rupture (MOR), and viscosity of wet silica gels were measured as functions of age of the gels, using a beam-bending method. The gels were prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) with a water/TEOS ratio of 16/1. The gels were aged and their properties were measured while immersed in the pore liquid. The modulus increased by about two decades and the MOR and viscosity increased by about one decade over a two-week period. Measurements of stress relaxation showed a strong dependence on sample size that is attributed to the flow of pore liquid out of the samples. The gels were found to be linearly viscoelastic.

Original language	English (US)
Pages (from-to)	14-22
Number of pages	9
Journal	Journal of Non-Crystalline Solids
Volume	107
Issue number	1
DOIs	https://doi.org/10.1016/0022-3093(88)90086-5
State	Published - Dec 2 1988

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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10.1016/0022-3093(88)90086-5

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AU - Scherer, George W.

AU - Pardenek, Sandra A.

AU - Swiatek, Rose M.

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N2 - The elastic modulus, modulus of rupture (MOR), and viscosity of wet silica gels were measured as functions of age of the gels, using a beam-bending method. The gels were prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) with a water/TEOS ratio of 16/1. The gels were aged and their properties were measured while immersed in the pore liquid. The modulus increased by about two decades and the MOR and viscosity increased by about one decade over a two-week period. Measurements of stress relaxation showed a strong dependence on sample size that is attributed to the flow of pore liquid out of the samples. The gels were found to be linearly viscoelastic.

AB - The elastic modulus, modulus of rupture (MOR), and viscosity of wet silica gels were measured as functions of age of the gels, using a beam-bending method. The gels were prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) with a water/TEOS ratio of 16/1. The gels were aged and their properties were measured while immersed in the pore liquid. The modulus increased by about two decades and the MOR and viscosity increased by about one decade over a two-week period. Measurements of stress relaxation showed a strong dependence on sample size that is attributed to the flow of pore liquid out of the samples. The gels were found to be linearly viscoelastic.

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Viscoelasticity in silica gel

Abstract

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