Engineering and Technology

Tuning polyamide membrane chemistry for enhanced desalination using Boc-protected ethylenediamine and its in situ Boc-deprotection

H. Ahmad, A. Waheed, et al.

This innovative research conducted by Hilal Ahmad, Abdul Waheed, Fahad Ayesh Alharthi, Christopher Michael Fellows, Umair Baig, and Isam H. Aljundi unveils a groundbreaking approach to enhancing polyamide membrane desalination performance. By integrating Boc-protected ethylenediamine into membrane fabrication, the study achieves remarkable salt rejection and flux rates, promising better desalination solutions for the future.

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Abstract

This research enhances polyamide membrane desalination performance by chemically tuning the active layer using Boc-protected ethylenediamine (EDA). One EDA amino group is Boc-protected, allowing the other to participate in interfacial polymerization (IP) with meta-phenylenediamine (MPD) and trimesoyl chloride (TMC). Subsequent Boc-deprotection generates hydrophilic ammonium groups, improving desalination. The MPD-TMC-EDA-Deboc membrane (Boc-deprotected) showed 98 ± 0.5% salt rejection and 25 L m⁻² h⁻¹ permeate flux (25% increase over the control). Seawater nanofiltration showed 97% rejection and 23 L m⁻² h⁻¹ flux. Enhanced antifouling was also observed.

Publisher

npj Clean Water

Published On

Jul 25, 2024

Authors

Hilal Ahmad, Abdul Waheed, Fahad Ayesh Alharthi, Christopher Michael Fellows, Umair Baig, Isam H. Aljundi

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