화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.27, No.9, 937-942, 2004
Stability of dispersions
The importance of the production and application of disperse systems in industry is steadily growing, while colloidal systems surround us every day (for example foodstuffs, pharmaceuticals etc.). Understanding the forces and mechanisms of interaction allows the development of new materials and improvement of available systems. The stability of such systems is one of the central research points. One of the well-known physical models of colloid stability is given by DLVO-Theory. With this theory we have a tool to influence the stability of such dispersion systems. In this paper, electrokinetic methods are used to investigate interaction forces in disperse systems. The influence of pH-value, electrolyte concentration and valency is shown with suitable examples. However, in some cases the DLVO-model is not satisfactory, and reasons for this behavior will also be discussed.