Poly (ether imide sulfone) membranes from solutions in ionic liquids
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AbstractA membrane manufacture method based on non-volatile solvents and a high performance polymer, poly (ether imide sulfone) (EXTEM™), is proposed, as greener alternative to currently industrial process. We dissolved EXTEM™ in pure ionic liquids: 1-ethyl-3-methylimidalzolium thiocyanate ([EMIM]SCN), 1-butyl-3-methylimidalzolium thiocyanate ([BMIM]SCN), and 1-ethyl-3-methylimidalzolium acetate ([EMIM]OAc). The following polymer solution parameters were evaluated to optimize the manufacture: Gibbs free energy of mixing (G), intrinsic viscosity () and hydrodynamic diameter. Membranes with sponge-like structure and narrow pore size distribution were obtained from solutions in [EMIM]SCN. They were tested for separation of proteins and deoxyribonucleic acids (DNA). Due to the polymer stability, we foresee that applications in more demanding chemical separations would be possible. [EMIM]SCN was 96 % purified and recovered after the membrane fabrication, contributing to the sustainability of the whole manufacturing process.
CitationKim D, Nunes SP (2017) Poly (ether imide sulfone) membranes from solutions in ionic liquids. Industrial & Engineering Chemistry Research. Available: http://dx.doi.org/10.1021/acs.iecr.7b03581.
SponsorsThis work was sponsored by King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)