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Promoted water transport across graphene oxide-poly(amide) thin film composite membranes and their antibacterial activity

He,L, Dumée,LF, Feng,C, Velleman,L, Reis,R, She,F, Gao,W and Kong,L 2015, Promoted water transport across graphene oxide-poly(amide) thin film composite membranes and their antibacterial activity, Desalination, vol. 365, pp. 126-135, doi: 10.1016/j.desal.2015.02.032.

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Title Promoted water transport across graphene oxide-poly(amide) thin film composite membranes and their antibacterial activity
Author(s) He,L
Dumée,LFORCID iD for Dumée,LF orcid.org/0000-0002-0264-4024
Feng,C
Velleman,L
Reis,R
She,FORCID iD for She,F orcid.org/0000-0001-8191-0820
Gao,W
Kong,LORCID iD for Kong,L orcid.org/0000-0001-6219-3897
Journal name Desalination
Volume number 365
Start page 126
End page 135
Publisher Elsevier
Publication date 2015-06
ISSN 0011-9164
Keyword(s) Antibacterial activity
Controlled surface charge
Poly(amide) composite membrane
Promoted transport
Water desalination
Summary Hybrid composite membranes have great potential for desalination applications since water transport can be favorably promoted by selective diffusion at the interface between matrix and reinforcement materials. In this paper, graphene oxide nano-sheets were successfully incorporated across 200nm thick poly(amide) films by interfacial polymerization to form novel thin-film composite membranes. The impact of the graphene oxide on the morphology, chemistry, and surface charge of the ultra-thin poly(amide) layer, and the ability to desalinate seawater was investigated. The graphene oxide nano-sheets were found to be well dispersed across the composite membranes, leading to a lower membrane surface energy and an enhanced hydrophilicity. The iso-electric point of the samples, key to surface charge repulsion during desalination, was found to be consistently shifted to higher pH values with an increasing graphene oxide content. Compared to a pristine poly(amide) membrane, the pure water flux across the composite membranes with 0.12wt.% of graphene oxide was also found to increase by up to 80% from 0.122 to 0.219L·μm·m-2·h-1·bar-1 without significantly affecting salt selectivity. Furthermore, the inhibitory effects of the composite membrane on microbial growth were evaluated and the novel composite membranes exhibited superior anti-microbial activity and may act as a potential anti-fouling membrane material.
Language eng
DOI 10.1016/j.desal.2015.02.032
Field of Research 090404 Membrane and Separation Technologies
Socio Economic Objective 860604 Organic Industrial Chemicals (excl. Resins
HERDC Research category C1 Refereed article in a scholarly journal
Grant ID Alfread Deakin Postdoctoral Fellow
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070351

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Fri, 06 Mar 2015, 15:14:57 EST

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