Abstract.
The rheological properties of sodium montmorillonite particles were studied in exhaustively deionized aqueous dispersions and in the presence of a small amount of sodium chloride. The shear viscosities were several magnitudes higher than those expected from Einstein's coefficient and decreased sharply when the concentration of sodium chloride increased. The storage moduli of deionized dispersions were constant, irrespective of the angular frequency, whereas they decreased sharply when the salt concentration and the angular frequency increased. The phase of the deionized dispersion was "solid" and transformed into "liquid" on the addition of sodium chloride.
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Kimura, H., Okubo, T. Rheological properties of sodium montmorillonite in exhaustively deionized dispersions and in the presence of sodium chloride. Colloid Polym Sci 280, 579–583 (2002). https://doi.org/10.1007/s00396-001-0647-y
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DOI: https://doi.org/10.1007/s00396-001-0647-y