Abstract
The performance of a newly developed separation analyzer is demonstrated by characterization of the sedimentation kinetics and the swelling behavior of organoclays in binary solvent mixtures (toluene/cyclohexane) as well as by investigation of oil-in-water and water-in-oil emulsions stabilized by clay derivatives. The automatic measuring system – LUMiFuge 114 – is based on a special centrifuge with an integrated optoelectronic sensor system which allows the measuring of spatial and temporal changes of light transmission during the rotation in a variable centrifugal field (12–1200g). By using the new device a fast and reproducible characterization of settling behavior and dispersion stability was possible. Moreover, the evaluation of the long-term stability of samples with high separation stability as well as of the heterogenity of the separation process, the sample transparency and the elasticity of the sediment as a function of alternating centrifugal force could be carried out.
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Received: 27 August 1999/Accepted in revised form: 24 November 1999
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Sobisch, T., Lerche, D. Application of a new separation analyzer for the characterization of dispersions stabilized with clay derivatives. Colloid Polym Sci 278, 369–374 (2000). https://doi.org/10.1007/s003960050527
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DOI: https://doi.org/10.1007/s003960050527