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Rheological measurements in titania gels synthesized from reverse micelles

Chemical Physics Letters, ISSN: 0009-2614, Vol: 323, Issue: 1, Page: 93-97
2000
  • 21
    Citations
  • 0
    Usage
  • 5
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    21
    • Citation Indexes
      21
  • Captures
    5

Article Description

TiO 2 sol and gel systems have been synthesized by hydrolysis of titanium butoxide in microemulsions W/O. Different systems compositions were prepared at constant W o =[H 2 O]/[AOT] and changing R =[H 2 O]/[Ti(BuO) 4 ]. Experimental measurements show a progressive increase of the viscosity with time, characteristic of a sol–gel transition. The rheology of the transition was studied by following the behavior of viscoelastic parameters ( G ′, G ″ and η *) as a function of time at different frequencies. The possibility to apply standard percolation theory was discussed. The application of two alternative growth models — either `fractal growth model' or `nearly linear growth model' — has been analysed.

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