Application of a new separation analyzer for the characterization dispersions stabilized with clay derivatives
T. Sobisch¹, D. Lerche¹ , Colloid Polymer Science (2000) 278:369-374.
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 filed. 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 as well as of the heterogeneity of the separation process, the sample transparency and elasticity of the sediment as a function of alternating centrifugal force could be carried out.
Key words: Organoclay dispersions • Separation analyzer • Elasticity • Emulsion stability • Emulsions stabilized by clay derivatives
¹ LUM GmbH Rudower Chaussee 29, D-12489 Berlin, Germany.Contact us
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