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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Poster: Micro and Nanofluidics

CPP 30.7: Poster

Mittwoch, 24. März 2010, 17:30–19:00, Poster C

Liquid Morphologies in wet granulates with large contact angle — •Marc Schaber¹, Mario Scheel³, Marco Di Michiel³, Stephan Herminghaus², and Ralf Seemann¹ — ¹Experimental Physics, Saarland University, D-66041 Saarbrücken — ²MPI for Dynamics and Self-Organisation, Bunsenstraße 10, D-37073 Göttingen — ³ESRF, 6 rue Jules Horowitz, F-38000 Grenoble

Adding liquid to dry granulates causes the formation of a network of capillary bridges and complex liquid morphologies inside the granulate and typically a stiffening of the granulate is observed. Depending on wettability of the granulate different liquid morphologies are formed. We explore the three dimensional liquid distribution within granulates composed of glass microspheres with a low contact angle and basalt microspheres with a large contact angle using X-ray micro-tomography. The emerging liquid morphologies are analyzed and compared for different liquid contents, contact angles and bead sizes. Using time resolved X-ray tomography we furthermore explore the liquid equilibration process as function of wettability.