ez4001356_si_001.pdf (619.04 kB)
Thin-Film Composite Polyamide Membranes Functionalized with Biocidal Graphene Oxide Nanosheets
journal contribution
posted on 2014-01-14, 00:00 authored by François Perreault, Marissa E. Tousley, Menachem ElimelechFouling
of membranes by microorganisms is a major limiting factor
in membrane separation processes. Novel strategies are therefore required
to decrease the extent of bacterial growth on membranes. In this study,
we confer strong antimicrobial properties to thin-film composite polyamide
membranes by a simple graphene oxide surface functionalization. Using
amide coupling between carboxyl groups of graphene oxide and carboxyl
groups of the polyamide active layer, graphene oxide is irreversibly
bound to the membrane. Surface binding of graphene oxide is demonstrated
by scanning electron microscopy and Raman spectroscopy. Direct contact
of bacteria with functionalized graphene oxide on the membrane surface
results in 65% bacterial inactivation after 1 h of contact time. This
bactericidal effect is imparted to the membrane without any detrimental
effect to the intrinsic membrane transport properties. Our results
suggest that functionalization of thin-film composite membranes with
graphene oxide nanosheets is a promising approach for the development
of novel antimicrobial membranes.
History
Usage metrics
Categories
Keywords
membrane transport propertiesmembrane surface resultsfunctionalized graphene oxideBiocidal Graphene Oxide NanosheetsFoulinggraphene oxidegraphene oxide surface functionalizationscanning electron microscopymembrane separation processesnovel antimicrobial membranesgraphene oxide nanosheetscarboxyl groups
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC