Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane

Low, ZX; Razmjou, A; Wang, K; Gray, S; Duke, M; Wang, H

Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane

Low, ZX Razmjou, A Wang, K Gray, S Duke, M Wang, H

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Publisher:: ELSEVIER SCIENCE BV
Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2014, 460, pp. 9-17
Issue Date:: 2014-06-15

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Field	Value	Language
dc.contributor.author	Low, ZX
dc.contributor.author	Razmjou, A
dc.contributor.author	Wang, K
dc.contributor.author	Gray, S
dc.contributor.author	Duke, M
dc.contributor.author	Wang, H
dc.date.accessioned	2023-03-27T00:33:48Z
dc.date.available	2023-03-27T00:33:48Z
dc.date.issued	2014-06-15
dc.identifier.citation	Journal of Membrane Science, 2014, 460, pp. 9-17
dc.identifier.issn	0376-7388
dc.identifier.issn	1873-3123
dc.identifier.uri	http://hdl.handle.net/10453/168503
dc.description.abstract	A new two-dimensional zeolitic imidazolate framework with leaf-shaped morphology (ZIF-L) was incorporated into polyethersulfone (PES) ultrafiltration membranes to investigate how the ZIF nanoflakes affect functional membrane properties. The membranes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), and contact angle goniometry. The water permeability and molecular weight cut-offs (MWCO) of membranes were also determined under constant pressure filtration. Membrane fouling resistance was characterized under constant flux operation using bovine serum albumin (BSA) as foulant. The modified UF membrane with 0.5% ZIF-L loading showed around 75% increase in water flux without greatly affecting the MWCO. Also, the same membrane showed almost twice the fouling resistance improvement against BSA with more than 80% water flux recovery. The improvement was due to the combined effect of the lower zeta potential of the modified membrane, increased hydrophilicity and reduced surface roughness, which made the attachment of BSA protein on the membrane surface more difficult. These results demonstrate that the addition of 2-dimensional ZIF-L nanoflakes is effective for improving polymer membrane fouling resistance and water flux. © 2014 Elsevier B.V.
dc.language	English
dc.publisher	ELSEVIER SCIENCE BV
dc.relation.ispartof	Journal of Membrane Science
dc.relation.isbasedon	10.1016/j.memsci.2014.02.026
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Effect of addition of two-dimensional ZIF-L nanoflakes on the properties of polyethersulfone ultrafiltration membrane
dc.type	Journal Article
utslib.citation.volume	460
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-27T00:33:46Z
pubs.publication-status	Published
pubs.volume	460

Abstract:

A new two-dimensional zeolitic imidazolate framework with leaf-shaped morphology (ZIF-L) was incorporated into polyethersulfone (PES) ultrafiltration membranes to investigate how the ZIF nanoflakes affect functional membrane properties. The membranes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), and contact angle goniometry. The water permeability and molecular weight cut-offs (MWCO) of membranes were also determined under constant pressure filtration. Membrane fouling resistance was characterized under constant flux operation using bovine serum albumin (BSA) as foulant. The modified UF membrane with 0.5% ZIF-L loading showed around 75% increase in water flux without greatly affecting the MWCO. Also, the same membrane showed almost twice the fouling resistance improvement against BSA with more than 80% water flux recovery. The improvement was due to the combined effect of the lower zeta potential of the modified membrane, increased hydrophilicity and reduced surface roughness, which made the attachment of BSA protein on the membrane surface more difficult. These results demonstrate that the addition of 2-dimensional ZIF-L nanoflakes is effective for improving polymer membrane fouling resistance and water flux. © 2014 Elsevier B.V.

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http://hdl.handle.net/10453/168503