Sheared aqueous two-phase biopolymer–surfactant mixtures

Aqueous two-phase biopolymer–surfactant mixtures have so far received only little attention. Here, the behaviour of such mixtures was investigated adopting methods well established for aqueous two-phase biopolymer–biopolymer mixtures. The pullulan–sodium dodecyl sulphate (SDS) mixture, in which phase separation can be induced, and then enhanced by the addition of sodium chloride (NaCl), was chosen as a model system and its morphology and rheology under shear was analysed.