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Colloid and Polymer Science

, Volume 277, Issue 5, pp 462–468 | Cite as

High- and low-molecular-weight lignosulfonates and Kraft lignins as oil/water-emulsion stabilizers studied by means of electrical conductivity

  • S. A. Gundersen
  • J. Sjöblom
ORIGINAL CONTRIBUTION

Abstract

Electrical conductivity measurements were used to study the creaming rates in oil/water emulsions stabilized with five lignosulfonates and one Kraft lignin. The creaming process resulted in a narrow dispersion band separating the water-rich and the oil-rich phases. An electrode was designed to follow this zone in the emulsion as a function of time. This makes it possible to calculate the amount of water separated from the emulsion directly from the creaming profiles. The stability concerning creaming was also evaluated with data obtained from visual inspection. Equivalent creaming profiles indicate that the electrode design used is suitable for stability measurements in the systems examined. Droplet interaction in diluted emulsions was studied with video-enhanced microscopy.

Key words Lignosulfonates Oil/water emulsions Creaming rates Conductivity measurements 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • S. A. Gundersen
    • 1
  • J. Sjöblom
    • 1
  1. 1.Department of chemistry University of Bergen N-5007 Bergen, NorwayNO

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