Effect of pH on the surface and interfacial behavior of rhamnolipids R1 and R2

Ozdemir, GÜNSELİ; Peker, Sümer; Helvaci, ŞERİFE

doi:10.1016/j.colsurfa.2003.10.024

Effect of pH on the surface and interfacial behavior of rhamnolipids R1 and R2

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, cilt.234, ss.135-143, 2004 (SCI İndekslerine Giren Dergi)

Cilt numarası: 234
Basım Tarihi: 2004
Doi Numarası: 10.1016/j.colsurfa.2003.10.024
Dergi Adı: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Sayfa Sayısı: ss.135-143

Özet

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.