Effect of drying on viscoelasticity and permeability of gel

George W. Scherer

Research output: Contribution to journalConference article

3 Scopus citations

Abstract

The beam-bending method was used to measure the effect of partial drying on the viscoelastic relaxation behavior and permeability of a two-step acid-basecatalyzed silica gel. Both the elastic modulus (E) and the permeability (D) showed a power-law dependence on density (ρ): E approximately ρm, m≈3.0; D approximately ρ-n, n≈2.5. The viscosity of the network rose from approximately 1011 to approximately 1013 Pa·s, and was strongly dependent on age as well as density of the gel. The viscoelastic relaxation function was well described by the stretched exponential function with an exponent of 0.3-0.5.

Original languageEnglish (US)
Pages (from-to)209-215
Number of pages7
JournalMaterials Research Society Symposium - Proceedings
Volume346
DOIs
StatePublished - 1994
EventProceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA
Duration: Apr 4 1994Apr 8 1994

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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