Magnetic modulation of the transport of organophilic solutes through Supported Magnetic Ionic Liquid Membranes

Abstract

The present work evaluates the influence of magnetic field on the transport of two model organic compounds, ibuprofen and α – pinene, through supported magnetic ionic liquids membranes (SMILMs). The membranes studied were prepared by incorporation of magnetic ionic liquids (MILs), [C11H21N2O]3 [GdCl3Br3], [C4mim] [FeCl4] and [C8mim] [FeCl4]. Transport studies were conducted in the absence and presence of a magnetic field with an intensity of 1.2T.The results obtained show that the magnetic field increases the diffusion coefficient of ibuprofen and α – pinene, improving their transport through the SMILM. The two transport studies performed, α – pinene in dodecane through a SMILM with [C4mim] [FeCl4], and α – pinene in hexane through a SMILM with [C8mim] [FeCl4], revealed a permeability increase of 51% and 29% respectively when exposed to the magnetic field, whereas transport studies of ibuprofen in dodecane through [C11H21N2O]3[GdCl3Br3] MIL showed a permeability increase of 59% under the same magnetic field conditions. The analysis of the magnetic field influence on solute permeation revealed that the permeability increase observed cannot be solely interpreted due to a decrease of MILs viscosity induced by the magnetic field. The magnetic dependence of solutes solubility in the MILs should also be considered.