Important double bond effect on the aggregation behavior of an alkenyl succinic acid derivative

OSCAR FERNANDO SILVA; RITA H. DE ROSSI; MARIANA A. FERNÁNDEZ

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 507 p. 134 - 134

0927-7757

he aggregation behavior of 2-(2-decenyl) succinic acid (C10SA) in alkaline aqueous media was extensively studied and found interesting properties. The CMC (critical micelle concentration) is lower than expected for a compound with two carboxylate groups and an alkenyl chain of 10-12 carbon atoms. We identified that among the factors that affect the CMC, the double bond and the arrangement of the carbonyl group play a crucial role. They favor an ease packing of the head group of the surfactant resulting in a reduction of their mutual repulsion in the micelle. This particular conformation influences the solubilization/aggregation behavior and is responsible of the high tendency to self-assembly forming micelles of spherical shape and small size. An important feature of C10SA molecules is their ability to orient the carboxyl groups in a way that allow them been packed in the aggregates and this property may be of interest for many future applications.