Please use this identifier to cite or link to this item: https://doi.org/10.1080/08927010802578932
Title: Surface functionalization of Cu-Ni alloys via grafting of a bactericidal polymer for inhibiting biocorrosion by Desulfovibrio desulfuricans in anaerobic seawater
Authors: Yuan, S.J. 
Liu, C.K. 
Pehkonen, S.O. 
Bai, R.B. 
Neoh, K.G. 
Ting, Y.P. 
Kang, E.T. 
Keywords: Bactericidal polymers
Biocorrosion
Cu-Ni alloy
Seawater
Surface grafting
Issue Date: Feb-2009
Source: Yuan, S.J., Liu, C.K., Pehkonen, S.O., Bai, R.B., Neoh, K.G., Ting, Y.P., Kang, E.T. (2009-02). Surface functionalization of Cu-Ni alloys via grafting of a bactericidal polymer for inhibiting biocorrosion by Desulfovibrio desulfuricans in anaerobic seawater. Biofouling 25 (2) : 109-125. ScholarBank@NUS Repository. https://doi.org/10.1080/08927010802578932
Abstract: A novel surface modification technique was developed to provide a copper nickel alloy (M) surface with bactericidal and anticorrosion properties for inhibiting biocorrosion. 4-(chloromethyl)-phenyl tricholorosilane (CTS) was first coupled to the hydroxylated alloy surface to form a compact silane layer, as well as to confer the surface with chloromethyl functional groups. The latter allowed the coupling of 4-vinylpyridine (4VP) to generate the M-CTS-4VP surface with biocidal functionality. Subsequent surface graft polymerization of 4VP, in the presence of benzoyl peroxide (BPO) initiator, from the M-CTS-4VP surface produced the poly(4-vinylpyridine) (P(4VP)) grafted surface, or the M-CTS-P(4VP) surface. The pyridine nitrogen moieties on the M-CTS-P(4VP) surface were quaternized with hexylbromide to produce a high concentration of quaternary ammonium groups. Each surface functionalization step was ascertained by X-ray photoelectron spectroscopy (XPS) and static water contact angle measurements. The alloy with surface-quaternized pyridinium cation groups (N+) exhibited good bactericidal efficiency in a Desulfovibrio desulfuricans-inoculated seawater-based modified Barr's medium, as indicated by viable cell counts and fluorescence microscopy (FM) images of the surface. The anticorrosion capability of the organic layers was verified by the polarization curve and electrochemical impedance spectroscopy (EIS) measurements. In comparison, the pristine (surface hydroxylated) Cu-Ni alloy was found to be readily susceptible to biocorrosion under the same environment. © 2009 Taylor & Francis.
Source Title: Biofouling
URI: http://scholarbank.nus.edu.sg/handle/10635/64640
ISSN: 08927014
DOI: 10.1080/08927010802578932
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