Journal article

Cluster, glass, and gel formation and viscoelastic phase separation in aqueous clay suspensions

  • Shalkevich, Andrey Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Stradner, Anna Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Bhat, Suresh Kumar Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland - Polymer Science and Engineering Division, National Chemical Laboratory, Pune, India
  • Muller, François Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland - Institute of Chemistry, University of Graz, Austria
  • Schurtenberger, Peter Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
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    27.02.2007
Published in:
  • Langmuir. - 2007, vol. 23, no. 7, p. 3570 -3580
English We have systematically investigated the phase diagram of clay particles in water to understand the relation between the local and macroscopic properties and the structures of clay suspensions. We focused, in particular, on sodium Cloisite (CNa) particles at concentrations typically used in nanocomposites (concentrations from 1 to 4 wt %) and at an extended range of ionic strengths (10⁻⁵ to 10⁻² M NaCl). The suspensions have been characterized using rheology and a combination of scattering techniques (neutrons, X-rays, and light). We demonstrate the existence of a liquid cluster phase at low clay and intermediate salt concentrations and provide new insight into the nature of the solidlike dispersions at low and high ionic strengths.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
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Persistent URL
https://folia.unifr.ch/unifr/documents/300589
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