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Cited by 358

The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.

Covalent Binding of Single-Walled Carbon Nanotubes to Polyamide Membranes for Antimicrobial Surface Properties

Open access
Tiraferri, Alberto, Vecitis, Chad D., Elimelech, Menachem·2011·ACS Applied Materials & Interfaces

Abstract

We propose an innovative approach to impart nanomaterial-specific properties to the surface of thin-film composite membranes. Specifically, biocidal properties were obtained by covalently binding single-walled carbon nanotubes (SWNTs) to the membrane surface. The SWNTs were first modified by purification and ozonolysis to increase their sidewall functionalities, maximize cytotoxic properties, and achieve dispersion in aqueous solution. A tailored reaction protocol was developed to exploit the inherent moieties of hand-cast polyamide membrane surfaces and create covalent amide bonds with the functionalized SWNTs. The reaction is entirely aqueous-based and entails activation of the carboxylate groups of both the membrane and the nanomaterials to maximize reaction with ethylenediamine. The presence of SWNTs was verified after sonication of the membranes, confirming the strength of the bond between the SWNTs and the membrane surface. Characterization of the SWNT-functionalized surfaces demonstrated the attainment of membranes with novel properties that continued to exhibit high performance in water separation processes. The presence of surface-bound antimicrobial SWNTs was confirmed by experiments using E. coli cells that demonstrated an enhanced bacterial cytotoxicity for the SWNT-coated membranes. The SWNT membranes were observed to achieve up to 60% inactivation of bacteria attached to the membrane within 1 h of contact time. Our results suggest the potential of covalently bonded SWNTs to delay the onset of membrane biofouling during operation.

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Crossref · 10.1021/am200536p

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Metadata

Authors
Tiraferri, A., Vecitis, C. D., & Elimelech, M.
Venue
ACS Applied Materials & Interfaces
Published
2011-06-30
Volume
3
Issue
8
Pages
2869-2877
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2057803705
Cited by
358
References
34
FWCI
15.09
Type
journal article
Language
en
Open access
green

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