Poly(ether imide sulfone) Membranes from Solutions in Ionic Liquids | Zendy

DooLi Kim | Zendy; Suzana P. Nunes | Zendy

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Poly(ether imide sulfone) Membranes from Solutions in Ionic Liquids

Author(s) -

DooLi Kim,

Suzana P. Nunes

Publication year - 2017

Publication title -

industrial and engineering chemistry research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.878

H-Index - 221

eISSN - 1520-5045

pISSN - 0888-5885

DOI - 10.1021/acs.iecr.7b03581

Subject(s) - membrane , ionic liquid , thiocyanate , ether , imide , polymer , sulfone , chemical engineering , chemistry , chemical stability , ionic bonding , polymer chemistry , materials science , organic chemistry , ion , biochemistry , engineering , catalysis

A 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

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