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1 results

  • Interfacial Effect in Water-Infiltrated Nanoporous Media

  • Zhongshan Chen, Fangxing Jiang, J. C. M. Li
  • Journal:
    MRS Online Proceedings Library Archive / Volume 290 / 1992
    Published online by Cambridge University Press:
    15 February 2011, 179
    Print publication:
    1992

  • 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.