Please use this identifier to cite or link to this item: https://doi.org/10.1021/am800182d
Title: Inorganic-organic hybrid coatings on stainless steel by layer-by-layer deposition and surface-initiated atom-transfer-radical polymerization for combating biocorrosion
Authors: Yuan, S.J. 
Pehkonen, S.O.
Ting, Y.P. 
Neoh, K.G. 
Kang, E.T. 
Keywords: ATRP
biocorrosion
inorganic-organic hybrid coatings
layer-by-layer deposition
stainless steel
Issue Date: 25-Mar-2009
Citation: Yuan, S.J., Pehkonen, S.O., Ting, Y.P., Neoh, K.G., Kang, E.T. (2009-03-25). Inorganic-organic hybrid coatings on stainless steel by layer-by-layer deposition and surface-initiated atom-transfer-radical polymerization for combating biocorrosion. ACS Applied Materials and Interfaces 1 (3) : 640-652. ScholarBank@NUS Repository. https://doi.org/10.1021/am800182d
Abstract: To improve the biocorrosion resistance of stainless steel (SS) and to confer the bactericidal function on its surface for inhibiting bacterial adhesion and biofilm formation, well-defined inorganic-organic hybrid coatings, consisting of the inner compact titanium oxide multilayers and outer dense poly(vinyl-N-hexylpyridinium) brushes, were successfully developed. Nanostructured titanium oxide multilayer coatings were first built up on the SS substrates via the layer-by-layer sol-gel deposition process. The trichlorosilane coupling agent, containing the alkyl halide atom-transfer- radical polymerization (ATRP) initiator, was subsequently immobilized on the titanium oxide coatings for surface-initiated ATRP of 4-vinylpyridine (4VP). The pyridium nitrogen moieties of the covalently immobilized 4VP polymer, or P(4VP), brushes were quaternized with hexyl bromide to produce a high concentration of quaternary ammonium salt on the SS surfaces. The excellent antibacterial efficiency of the grafted polycations, poly(vinyl-N-pyridinium bromide), was revealed by viable cell counts and atomic force microscopy images of the surface. The effectiveness of the hybrid coatings in corrosion protection was verified by the Tafel plot and electrochemical impedance spectroscopy measurements. © 2009 American Chemical Society.
Source Title: ACS Applied Materials and Interfaces
URI: http://scholarbank.nus.edu.sg/handle/10635/89240
ISSN: 19448244
DOI: 10.1021/am800182d
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