Characterization of nanostructuring effects at solid liquid interfaces by analytical centrifugation
T. Sobisch and D. Lerche¹; 11th Ostwald Kolloqium of the German Colloid Society, Wuerzburg, Germany, April 2002.
Abstract: Nanostructuring of liquids and sorption layers has very important influence on the behavior of solid liquid disperse systems and process at the solid liquid interface. Studies in this area often employ very sophisticated methods of characterization, i.e. surface force measurements. Analytical centrifugation is a relatively simple but efficient alternative approach. The LUMiFuge 116 analytical centrifuge can be used with high precision to determine sediment height as a function of centrifugal acceleration (pressure range approximately 500 - 50,000 N/m², temperatures up to 60 Celsius). It has been shown that the packing and compression behavior of monodisperse silica suspensions in binary solvent mixtures of different alkanols with cyclohexane can be classified and diferences quantified.
Key words: Nanostructuring • Silica Dispersions • Packing and compression behavior • flocculation • Secondary minimum • Weak flocculation • Ideal hard sphere packing • Non polar solvents
¹ LUM GmbH, Rudower Chaussee 29, 12489 Berlin, Germany.Contact us
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