Investigation of the pressure dependency of phase equilibria in colloidal model systems [Elektronische Ressource] / Karolina Tomczyk

Investigation of the pressure dependency of phase equilibria in colloidal model systems Inaugural-Dissertation zur Erlangung des Doktorgrades der Mathematisch-Naturwissenschaftlichen Fakultät der Heinrich-Heine-Universität Düsseldorf vorgelegt von Karolina Tomczyk aus Zgierz May 2011 Aus dem Institut für der Heinrich-Heine-Universität Düsseldorf Gedruckt mit der Genehmigung der Mathematisch-Naturwissenschaftlichen Fakultät der Heinrich-Heine-Universität Düsseldorf Referent: Prof. Dr. J. K. G. Dhont Koreferent: Prof. Dr. S. U. Egelhaaf Tag der mündlichen Prüfung: 29.06.2011 2Summary In this thesis the experimental studies of pressure jumps effect on several systems, representing a cross-section of soft matter materials. The phase behaviour of colloidal dispersions and polymeric micellar solutions using temperature and pressure as variables are presented in the first part. The second part addresses the correlation between temperature dependency of polymer viscosity and the diffusion time of a nanoscopic probe dissolved in this polymer. As the first subject-matter, the interplay between percolation and phase separation effect appearing in an adhesive hard sphere (AHS) system, represented by octadecyl coated silica particles dissolved in toluene, is discussed.