title: Dynamic Percolation and Swollen Behavior of Nanodroplets in 1-Ethyl-3-methylimidazolium Trifluoromethanesulfonate/Triton X-100/Cyclohexane Microemulsions.
abstract: Microemulsions comprising an ionic liquid (IL), 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([emim][OTf]), as the polar component, Triton X-100 as a surfactant, and cyclohexane as the nonpolar medium were prepared and characterized. Conductivity and dynamic viscosity data were critically analyzed to confirm dynamic percolation among the droplets that are in continuous motion, aggregation, and fission. The transition from oil-continuous phase to bicontinuous phase was observed at the conductance and viscosity percolation thresholds and sharp changes in the values of conductivity and dynamic viscosity could be identified. Dynamic light scattering measurements revealed swelling of the droplets, which varied within the hydrodynamic diameter range of 10-100 nm. Diffusivity of the droplets suggested less Brownian movement with increased amount of the IL. Moreover, changes in the droplet sizes and diffusivity with increase in IL content supported dynamic percolation within the systems.
authors.affiliation: Department of Chemistry, University of Dhaka , Dhaka 1000, Bangladesh.
authors.forename: Adhip
authors.initials: A
authors.lastname: Rahman
authors.affiliation: University Grants Commission of Bangladesh , 29/1 Agargaon, Dhaka 1207, Bangladesh.
authors.forename: M Muhibur
authors.initials: MM
authors.lastname: Rahman
authors.affiliation: University Grants Commission of Bangladesh , 29/1 Agargaon, Dhaka 1207, Bangladesh.
authors.forename: M Yousuf A
authors.initials: MY
authors.lastname: Mollah
authors.affiliation: Department of Chemistry, University of Dhaka , Dhaka 1000, Bangladesh.
authors.forename: Md Abu Bin Hasan
authors.initials: MA
authors.lastname: Susan