Interaction of mono-carboxylic acids in benzene studied by small-angle neutron scattering

Petrenko, Viktor I.; Avdeev, Mikhail V.; Almásy, László; Bulavin, Leonid A.; Aksenov, Victor L.; Rosta, László; Garamus, Vasil M.

doi:10.1016/j.colsurfa.2008.12.001

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Journal article

Interaction of mono-carboxylic acids in benzene studied by small-angle neutron scattering

Petrenko, Viktor I. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia - Physics Department, Kyiv Taras Shevchenko National University, Kyiv, Ukraine
Avdeev, Mikhail V. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia - Russian Research Center “Kurchatov Institute”, Moscow, Russia
Almásy, László Adolphe Merkle Institute, University of Fribourg, Switzerland - Laboratory for Neutron Scattering, PSI and ETH Zürich, Villigen, Switzerland
Bulavin, Leonid A. Physics Department, Kyiv Taras Shevchenko National University, Kyiv, Ukraine
Aksenov, Victor L. Russian Research Center “Kurchatov Institute”, Moscow, Russia - Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
Rosta, László Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Budapest, Hungary
Garamus, Vasil M. GKSS Research Centre, Geesthacht, Germany

09.12.2008

Published in:

Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 2009, vol. 337, no. 1-3, p. 91-95

Small-angle neutron scattering

English The intermolecular interaction of non-saturated (oleic acid) and saturated (stearic and myristic acids) mono-carboxylic acids in a non-polar organic solvent (deuterated benzene) is derived from the concentration dependence of the small-angle neutron scattering. The excluded volume repulsion dominates over the attraction (supposed due to van der Waals forces) for oleic and myristic acids. In turn, for stearic acid the attractive component is higher than the repulsive one; this results in a shift of the transition into the liquid crystalline state (because of molecule anisotropy) towards smaller concentrations and could explain early data on worse stabilization properties of stearic acid in ferrofluids compared to oleic and myristic acids.

Faculty

Faculté des sciences et de médecine

Department

AMI - Soft Nanoscience

Language