Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 28: POSTERS Interfaces and Thin Films

CPP 28.27: Poster

Mittwoch, 25. März 2009, 17:00–19:00, P3

Thermotropic liquid crystal foams — •Torsten Trittel, Thomas John, and Ralf Stannarius — Otto-von-Guericke-Universität Magdeburg

Foams made from surfactant solutions are well investigated and understood, but there is no information about properties of foams made from pure thermotropic materials. This new type of foams has advantages compared with ordinary soap foams. For example, higher stability and slower drainage. In our experiments, we investigate two-dimensional foams, made from liquid crystals in the smectic A phase, with the aid of digital image analysis. We focus on the temporal evolution (ageing) of these foams, especially in the long time regime, where scaling behaviour occurs. The evolution of the mean bubble radius ⟨ R ⟩ and distributiuon functions, e.g. bubble size distribution, are determined and compared with soap foams.