Info

where V1 is the partial molal volume of solvent and by analogy with osmotic pressure where c is the concentration of surfactant in the interfacial layer and NA is the Avogadro constant.

This equation probably appears more complex than it is. Apart from telling us the effect of increasing or decreasing 6, for example by using different polymers of different length (6), we can find out the effect of temperature and additives, as B is proportional to (1 - d/T), where 6 is the temperature (the a)

Surface separation distance, H

Figure 7.8 Entropic (steric) stabilisation: the potential energy-distance plots for (a) particles with no electrostatic repulsion, Vtotal = VS + VA; (b) with electrostatic repulsion, Vtotal = VS + VA + VR.

Surface separation distance, H

Figure 7.8 Entropic (steric) stabilisation: the potential energy-distance plots for (a) particles with no electrostatic repulsion, Vtotal = VS + VA; (b) with electrostatic repulsion, Vtotal = VS + VA + VR.

0 0

Post a comment