The 38th General Meeting of the German Colloid Society was held at the University of Essen, Germany, from September 29th to October 2nd, 1997. The selection of papers presented in this volume covers a broad range of fundamental aspects as well as recent developments. - It focuses the following sections: - Technical applications; - Advanced experimental techniques; - Thin films and interfaces; - Suspensions and microcapsules; - Emulsions, microemulsions and foams; - Macromolecules; - Association colloids; - Colloidal systems in environmental science.

Inhalt
Opening address at the 38th general conference of the German colloid society in Essen.- Wolfgang-ostwald-prize 1997: Awarded to Stig Friberg.- Thomas Graham Prize 1997 awarded to Armin Weiss.- The importance of colloid chemistry in industrial practice.- From polyurethane foam stabilization to amphiphilic particles An example of industrial R&D in colloid chemistry.- Experimental progress in the characterization of colloidal systems.- Colloids and interfaces: a theoretical perspective.- Adsorption of colloid particle mixtures at interfaces.- Correlation and prediction of liquid phase adsorption equilibria.- Large metal clusters and colloids Metals in the embryonic state.- Mechanics of encapsulated droplets.- Stability of hydrophilic/hydrophobic silica particles in binary liquids: Adsorption, rheological and SAXS experiments.- The reverse behavior of negatively and positively charged poly (N-isopropylacrylamide latex dispersions in alcohol-water mixtures at temperatures below their phase transition.- High pressure DC-magnetron sputtering on liquids: A new process for the production of metal nanosuspensions.- Time periodic changes of viscosity in kaolin suspensions as an example for modelling concentrated suspensions.- Vapor pressure of phenethyl alocohol and phenethyl acetate in the system with water and nonionic surfactant Polyoxyethylene 4 lauryl ether (Brij®30).- Microemulsion systems based on a C8/10 alkyl polyglucoside: A reentrant phase inversion induced by alcohols?.- Polymer-modified ionic microemulsions formed in the system SDS/water/xylene/pentanol.- Preparing microemulsions with silicone surfactants.- Influence of solubilized stilbazolium salts in trans and cis configuration on the percolation equilibrium in AOT-isooctane-water microemulsions: Lightinduced switching of conductivity.- Structure and dynamics of surfactant-based foams.- Lyotropic liquid-crystalline elastomers.- Adsorption of polyelectrolytes on colloidal particles Electrostatic interactions and stability behaviour.- Some aspects of colloidal polymers: Solvent structure originated interactions.- A proton NMR study on the structure of interfacial water of aqueous micelles: Effects of the structure of the surfactant.- Self-diffusion processes of water molecules near the surface of sodium octanoate micelles studied by molecular dynamics computer experiments.- Surfactant/foam process for improved efficiency of aquifer remediation.- Surfactant selection criteria for enhanced subsurface remediation: Laboratory and field observations.- Adsorption of anionic surfactant Na-dodecylsulphate (SDS) at the polyvinylpyrrolidone (PVP)-modified Na-montmorillonite surface.- Sorption of Cu2+ and Zn2+ at Na-montmorillonite: Analysis by means of affinity spectra.- Behavior of suspended and colloidal particles during artificial groundwater recharge.- On the influence of surfactants on the mobility of contaminants.- Interaction of colloidal soil particles, humic substances and cationic detergents studied by X-ray microscopy.