Improved antifouling and antibacterial properties of forward osmosis membranes through surface modification with zwitterions and silver-based metal-organic frameworks
       Mehdi Pejman,  Mostafa Dadashi Firouzjaei, Sadegh Aghapour Aktij, Parnab Das, Ehsan Zolghadr, Hesam Jafarian, Ahmad Arabi Shamsabadi, Mark Elliott, Milad Rabbani Esfahani*, Marco Sangermano, Mohtada Sadrzadeh, Evan K. Wujcik, Ahmad Rahimpour*, Alberto Tiraferri*
 Abstract
This study investigates the effect of surface functionalization of a thin-film composite forward osmosis membrane with zwitterions and silver-based metal organic frameworks (Ag-MOFs) to improve the antifouling, anti-biofouling, and antimicrobial activity of the membrane. Two types of zwitterions, namely, 3-bromopropionic acid and 1,3-propane sultone, are chemically bonded, with and without incorporation of Ag-MOFs, over the surface of a polyamide membrane. Spectroscopy measurements indicate successful grafting of the modifying agents on the membrane surface. Contact angle measurements demonstrate a notable improvement in surface wettability upon functionalization. The performance of the membranes is evaluated in terms of water and salt fluxes in forward osmosis filtrations. The transport data show demonstrably increased water flux of around 300% compared to pristine membranes, with similar or slightly reduced salt reverse flux. The antifouling and anti-biofouling properties of the modified membranes are evaluated using sodium alginate and E. coli, respectively. These experiments reveal that functionalized membranes exhibit significant antifouling and anti-biofouling behavior, with high resilience against flux decline.
                             Type                         Experimental
                             Publication           Journal of Membrane Science
                             Date                          June 2020
                             Links                        URL
                    
 
 Tags
bacteria, E.coli, membranes, water_treatment, metal-organic frameworks, chemical
mostafadadashifirouzjaei, water, mark_elliott, environmental treatment, alberto_tiraferri, ahmad_rahimpour
 
BibTex

@article{pejman2020improved, title={Improved antifouling and antibacterial properties of forward osmosis membranes through surface modification with zwitterions and silver-based metal organic frameworks}, author={Pejman, Mehdi and Firouzjaei, Mostafa Dadashi and Aktij, Sadegh Aghapour and Das, Parnab and Zolghadr, Ehsan and Jafarian, Hesam and Shamsabadi, Ahmad Arabi and Elliott, Mark and Esfahani, Milad Rabbani and Sangermano, Marco and others}, journal={Journal of Membrane Science}, pages={118352}, year={2020}, publisher={Elsevier} }