Effect of pH on the surface and interfacial behavior of rhamnolipids R1 and R2
Articles > Article · 2004
Authors: Günseli ÖZDEMİR, Sümer Peker, Şerife Şeref HELVACI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Journal Indexed in SCI Expanded, International, 2004, vol 234, pp 135-143
DOI: 10.1016/j.colsurfa.2003.10.024
Summary
Surface and interfacial tensions of pure R1 and R2 solutions at the pH values of 6.8 and 5 were comparatively studied in this work, with decane and hexadecane as the oil phase. Conductivities were measured as a function of concentration to supplement the surface tension results. Photographs of these solutions under cross-polarized light were taken to show the existence of liquid crystals. Foaming ability and stability of pure rhamnolipid solutions were determined using a modified Bikerman device.