Effect of some physical and chemical properties on the interactions between biopolymers and anionic surfactants

The combination of systems containing biopolymers surfactants is found in diverse formulated products such as wastewater treatment, food, drugs (pharmaceuticals), cosmetics, paints, detergents, pesticides and also in processes such as polymer synthesis, wastewater treatment and enhanced oil recovery. In this work, we examine the effect of surfactant: sodium dodecyl sulphate (SDS) on solutions containing biopolymer: xanthan gum, alkali and oil by interfacial tension (IFT), conductometric and rheological measurements. To this end, the method of experiments planning was adopted. Previous study on the conductivity profiles of SDS/Xanthan gum and salt systems had shown the existence of interaction and the curves presented linearity as expected. The results show an important effect on surface tension, IFT, conductometric and rheological properties on the studied systems; also, they indicate an important action of surfactant SDS, oil and biopolymer greatly influences IFT.