Hostname: page-component-7dd5485656-zlgnt Total loading time: 0 Render date: 2025-10-28T04:43:23.250Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Drying on Viscoelasticity and Permeability ofGel

Published online by Cambridge University Press:  21 February 2011

George W. Scherer
George W. Scherer*
Affiliation:
Du Pont Co., Experimental Station 356/384, Wilmington, DE 19880 USA
Get access

Abstract

The beam-bending method was used to measure the effect of partial drying onthe viscoelastic relaxation behavior and permeability of a two-stepacid-base catalyzed silica gel. Both the elastic modulus(E) and the permeability (D) showed apower-law dependence on density (ρ): E ～ ρm, m ≈ 3.0; D ～ ρ-n, n ≈ 2.5. The viscosity of the network rosefrom ～1011 to ～1013 Pa·s, and was strongly dependenton age as well as density of the gel. The viscoelastic relaxation functionwas well described by the stretched exponential function with an exponent of0.3–0.5.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 209
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1 Brinker, C.J. and Scherer, G.W., Sol - Gel Science (Academic Press, NY, 1990) Ch. 7 & 8Google Scholar
2 Keesman, MJ., Offermans, P.H.G., and Honig, E.P., Mater. Lett., 5 [4] 140–142 (1987)Google Scholar
3 Dumas, J., Baza, S., and Serughetti, J., J. Mater Sei Lett, 5, 478–480 (1986)Google Scholar
4 West, J.K., Nikles, R., and Latorre, G. in Better Ceramics Through Chemistry III, eds. Brinker, C.J., Clark, D.E., and Ulrich, D.R. (Mater. Res. Soc. Proc. 121, Pittsburgh, PA, 1988) pp. 219–224 Google Scholar
5 Pardenek, S.A., Fleming, J.W., and Klein, L.C. (Mat. Res. Soc. Proc. 88, Pittsburgh, PA, 1987) pp. 73–84 Google Scholar
6 Scherer, G.W., J. Non-Cryst. Solids, 109, 183–190 (1989)Google Scholar
7 Scherer, G.W., Pardenek, S.A., and Swiatek, R.M., J. Non-Cryst. Solids, 107, 14–22 (1988)Google Scholar
8 Scherer, G.W. and Swiatek, R.M., J. Non-Cryst. Solids, 113, 119–129 (1989)Google Scholar
9 Scherer, G.W., Hdach, H., and Phalippou, J., J. Non-Cryst. Solids, 130, 157–170 (1991); correction 136,269 (1991)Google Scholar
10 Scherer, G.W., J. Non-Cryst. Solids, 142 [1–2], 18–35 (1992)Google Scholar
11 Scherer, G.W., “Measuring permeability by the thermal expansion method for rigid or highly permeable gels”, to be published in J. Sol-Gel Sei. Tech.Google Scholar
12 Brinker, C.J., Keefer, K.D., Schaefer, D.W., Assink, R.A., Kay, B.D., and Ashley, C.S., J. Non-Cryst. Solids 63, 45–59 (1984)Google Scholar
13 Scherer, G.W., “Relaxation of a Viscoelastic Gel Bar: II. Silica Gel”, to be published in J. Sol-Gel Sei. Tech.Google Scholar
14 Scherer, G.W., J. Non-Cryst. Solids, 142 [1–2], 18–35 (1992)Google Scholar
15 Scherer, G.W., J. Sol-Gel Sei. Tech. 1, 169–175 (1994)Google Scholar
16 Scherer, G.W., Relaxation in Glass and Composites (Wiley, New York, 1986; reprinted by Krieger, Malabar, FL, 1992) pp. 41–4 4,91–9 2,133Google Scholar
17 DeBast, J. and Guard, P., Phys. Chem. Glasses [44], 117–128 (1963)Google Scholar
18 Pekala, R.W., Hrubesh, L.W., Tillotson, T.M., Alviso, C.T., Poco, J.F., and LeMay, J.D. in Mechanical Properties of Porous and Cellular Materials, eds. Sieradzki, K., Green, DJ., and Gibson, LJ. (Mater. Res. Soc. 207, Pittsburgh, PA, 1991) pp. 197–200 Google Scholar
19 Scherer, G.W., “Hydraulic radius and mesh size of gels”, to be published in J. Sol-Gel Sei. Tech.Google Scholar
20 Scherer, G.W., J. Non-Cryst. Solids, 109, 171–182 (1989)Google Scholar