This thesis deals with spherical microparticles trapped at liquid interfaces. It focuses on two aspects of their behavior: firstly, the effect of the curvature of a liquid interface on interparticle interactions and their organization; secondly, the mobility of particles at visco-elastic interfaces. In Chapter 2of this thesis we showed that it is p...
A pure steady-state dilation of a liquid interface, either liquid-air or water-oil, can be accomplished far from equilibrium by means of the overflowing cylinder technique. The resulting dynamic surface tension data correlate well with characteristic parameters of processes like foaming, emulsification, and the spreading of droplets and thin liquid...
The aim of this study was to investigate the influence of the molecular structure on the interfacial behaviour of polymers. Theoretical models were developed for three different systems. All these models are based on the self-consistent field theory of Scheutjens and Fleer for the adsorption of homopolymers.This self-consistent field theory is a la...
The adsorption of charge-determining (H +and OH -) and cadmium ions on rutile (TiO 2 ) and hematite (α-Fe 2 O 3 ) has been studied in different concentrations KNO 3 as a function of temperature and pH.Rutile and hematite show identical surface charge - pH behavior, except for the position of the point of zero charge (pH o): normalized with respect ...
The subject of this thesis is protein partition between an aqueous salt solution and a surface or an apolair liquid and the concomitant co-partition of small ions. The extent of co-partitioning determines the charge regulation in the protein partitioning process.Chapters 2 and 3 deal with phenomenological relations between the partition coefficient...
The purpose of this study is to gain insight in electrodynamic processes in colloidal systems, that is, in the electrical currents that flow because of the movement of charged particles. There is a need for such insight, because the DUO theory describing the stability of electrocratic colloids cannot answer the following question: can interacting p...
The adsorption of polyvinylalcohol (PVA) on the paraffin-water interface has been studied by interfacial tension measurements and by direct measurement of the adsorption with emulsions. The aim of the study was to provide more insight into the factors which influence the adsorption of polymers at phase interfaces. The interfacial properties of poly...
