TY - JOUR

T1 - Poly(ionic liquid)-Based charge and size selective loose nanofiltration membrane for molecular separation

AU - Naik, Nagaraj S.

AU - Padaki, Mahesh

AU - Isloor, Arun M.

AU - Nagaraja, K. K.

AU - Vishnumurthy, K. A.

N1 - Funding Information: This work was carried out with financial support from the Nano mission project, Department of Science and Technology, India (SR/NM/NS-20/2014). Publisher Copyright: © 2021 Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/8/15

Y1 - 2021/8/15

N2 - Separation of chemicals using membranes in smaller size regimes is a much-complicated process. An ideal membrane for molecular separation should be more hydrophilic with well-defined pore sizes for ensuring the selectivity to give a maximum solvent flux. Here, we report a poly(itaconic acid-co-styrene-co-sulfobetaine vinylimidazole) (PIL)/PSf blend selective filtration membrane with nanochannels for superior molecular separation. FESEM images showed asymmetrical membrane structure with a dense upper layer on the hallow spherical sphere, though contact angle measurements reported improved membrane hydrophilicity. Newly developed loose nanofiltration membranes showed a superior removal performance of synthetic dyes based on their size and charge, such as congo red (2.5 × 0.7 nm2 size, 99%) and Eriochrome Black T (1.5 × 0.8 nm2 sizes, 99%). The passage of methyl orange (1.1 × 0.4 nm2) demonstrating an excellent molecular separation capability due to their stable networks of interconnected nanochannel and thin selective layer. The overall results are promising and paving the way for environmental friendly and energy-efficient separation of chemicals through membranes in industrial applications.

AB - Separation of chemicals using membranes in smaller size regimes is a much-complicated process. An ideal membrane for molecular separation should be more hydrophilic with well-defined pore sizes for ensuring the selectivity to give a maximum solvent flux. Here, we report a poly(itaconic acid-co-styrene-co-sulfobetaine vinylimidazole) (PIL)/PSf blend selective filtration membrane with nanochannels for superior molecular separation. FESEM images showed asymmetrical membrane structure with a dense upper layer on the hallow spherical sphere, though contact angle measurements reported improved membrane hydrophilicity. Newly developed loose nanofiltration membranes showed a superior removal performance of synthetic dyes based on their size and charge, such as congo red (2.5 × 0.7 nm2 size, 99%) and Eriochrome Black T (1.5 × 0.8 nm2 sizes, 99%). The passage of methyl orange (1.1 × 0.4 nm2) demonstrating an excellent molecular separation capability due to their stable networks of interconnected nanochannel and thin selective layer. The overall results are promising and paving the way for environmental friendly and energy-efficient separation of chemicals through membranes in industrial applications.

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U2 - 10.1016/j.cej.2021.129372

DO - 10.1016/j.cej.2021.129372

M3 - Article

AN - SCOPUS:85102880912

SN - 1385-8947

VL - 418

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 129372

ER -