Recent study into stabilisation of foams and emulsions by
mixtures of proteins and particles observed that the addition of
surface-active particles in the presence of protein facilitated the
formation of a more rigid interfacial layer, due to enhanced packing
at the interface. This augmentation of the interfacial layer in the
presence of both particles and proteins was observed without any
evidence of electrostatic interactions between the molecules
(Murray et al., 2011). Even non-adsorbing particles can provide
additional stability through “Stratification” of such particles in the
intervening thin film. As long as the particles are well below the
initial radius of the thinning film, they can get trapped and structure
themselves into layers that are difficult to remove (Murray &
Ettelaie, 2004).