Abstract
ζ-potentials of a silica suspension and three types of polystyrene latex suspensions with different surface charge groups were measured, as a function of the particle concentration (φ) in the suspension over a wide range, using the colloid vibration potential (CVP) technique. The concentration dependence of theζ-potential in silica suspension is explained well by Levine et al.′s [1] cell model theory, verifying the applicability of the cell model to the CVP in silica suspension. However, theζ-potential of latex suspensions ordinarily decreases as the particle concentration increases, even after being corrected by the term of (1-φ). This tendency is especially noticeable in the systems that have particles with high surface charge densities. Furthermore, the conductivity measurements of these suspensions reveal that the conductivity of these systems, especially in their highly charged state, increases as the particle concentration is increased; opposite in tendency to silica suspensions. These new findings can be explained as follows: on the highly charged surface of a latex particle, a polyelectrolyte-like (“hairy”) layer is present, which overlaps at some point. This permits interparticle surface conduction and results in the abnormal behavior of CVP in these systems.
Similar content being viewed by others
References
Levine S, Neale G, Epstein N (1976) J Colloid Interface Sci 57:424
Marlow BJ, Fairhurst D, Pendse HP (1988) Langmuir 4:611
Bowen WR, Jacobs PM (1986) J Colloid Interface Sci 111:223
Van Den Hoven ThJJ, Bijsterbosch BH (1987) Colloids and Surfaces 22:187
Marlow BJ, Rowell RL (1985) Langmuir 1:83
Stöber W, Fink A (1968) J Colloid Interface Sci 26:62
Furusawa K, Norde W, Lyklema J (1972) Kolloid Z Z Polym 250:908
Juang MS, Krieger IM (1976) J Polym Sci 14:2089
Van den Hul HJ, Vanderhoff JW (1972) J Electroanal Chem 37:161
Kolthoff IM, Miller IK (1951) J Am Chem Soc 73:3055
Ottewill RH, Shaw JN (1967) Kolloid Z Z Polym 218:34
Hearn J, Ottewill RH, Shaw JN (1970) Br Polym J 2:116
Hermans J (1938) Philos Mag 25:426
Rutgers A (1938) Physica 5:46
Enderby JA (1951) Proc Phys Soc 207A:321
Booth F, Enderby JA (1952) Proc Phys Soc 208A:351
Zukoski CF, Saville DA (1987) J Colloid Interface Sci 115:422
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hozumi, Y., Furusawa, K. Electrokinetic study on concentrated suspensions using colloid vibration potential measurements. Colloid & Polymer Sci 268, 469–475 (1990). https://doi.org/10.1007/BF01411006
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01411006