Surface tension measurements of imidazolium based ionic liquids

I&EC 122

P. J. Carvalho, quijorge@ua.pt, M. G. Freire, mmartins@dq.ua.pt, A. J. Queimada, antonioq@dq.ua.pt, I. M. Marrucho, imarrucho@dq.ua.pt, and J. A. P. Coutinho, jcoutinho@dq.ua.pt. CICECO, Department of Chemistry, University of Aveiro, Campus Universitario de Santiago, Aveiro, 3810-193, Portugal
Ionic liquids (ILs) are a novel class of chemical compounds with a large range of interesting characteristics that are driving a lot of research in various fields. Since many of the ILs applications involve interfacial phenomena, obtaining information on their interfacial properties is extremely important to improve their selection and performance. This study focuses on the surface tensions of imidazolium based ionic liquids, whereas the influence of different anions, the inclusion of alkyl groups on the cation and the temperature dependence was studied. Surface tensions of pure ILs were measured in the temperature range between (288 and 343) K by using the Du Noüy ring method. The influence of the water content on the surface tension was also investigated. Surface tensions as function of temperature and water content will be presented and discussed for the studied ILs during the meeting.