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Interfacial Effect in Water-Infiltrated Nanoporous Media

Published online by Cambridge University Press:  15 February 2011

Zhongshan Chen ,
Fangxing Jiang  and
J. C. M. Li
Zhongshan Chen
Affiliation:
Materials Science Program, Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627
Fangxing Jiang
Affiliation:
Materials Science Program, Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627
J. C. M. Li
Affiliation:
Materials Science Program, Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627
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Abstract

Water infiltrated nanoporous glasses have a damping peak at about 1 Hz (4.6 nm pore size) and 6 Hz (8.8 nm pore size) at room temperature; their relaxation strengths are consistent with the damping mechanism in which water flows from the regions of compression to those of tension. However, the damping peaks disappear when water content is below 60% for the 4.6 urn pore size glass and 40% for the 8.8 urn pore size glass. These water contents correspond to about a 0.85 and 1.0 urn thick interfacial water layer on the internal surfaces of the nanoporous glasses. The adsorbed layer contributes only to the damping background. Finally, dependencies of relaxation time on sample thickness, bulk modulus and viscosity agree well with the predictions of the model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 290: Symposium N – Dynamics in Small Confining Systems , 1992 , 179
Copyright
Copyright © Materials Research Society 1993

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