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Title: Stainless steel surfaces with thiol-terminated hyperbranched polymers for functionalization via thiol-based chemistry
Authors: Yang, W.J.
Neoh, K.-G. 
Kang, E.-T. 
Lay-Ming Teo, S. 
Rittschof, D.
Issue Date: 2013
Citation: Yang, W.J., Neoh, K.-G., Kang, E.-T., Lay-Ming Teo, S., Rittschof, D. (2013). Stainless steel surfaces with thiol-terminated hyperbranched polymers for functionalization via thiol-based chemistry. Polymer Chemistry 4 (10) : 3105-3115. ScholarBank@NUS Repository.
Abstract: Hyperbranched polyethyleneimine (BPEI) was coupled to a polydopamine-coated stainless steel (SS) substrate. Subsequent mercaptoethylation of BPEI with ethylene sulfide produced thiol functional groups on the SS surface. Functionalization of the surface was achieved by end-capping of the hyperbranches with organic molecules via thiol-based chemistry, including thiol-epoxy coupling, thiol-ene radical photo-addition and thiol-Michael addition. The SS-P(HEMA-b-SBMA) surface was prepared via thiol-ene radical photo-addition of the hyperbranches with an alkene-functionalized poly(2-hydroxyethyl methacrylate) (alkene-PHEMA) from atom transfer radical polymerization (ATRP) and subsequent block copolymerization of the zwitterionic monomer, N-(3-sulfopropyl)-N-(methacryloxyethyl)-N,N-dimethyl ammonium betaine (SBMA). The SS-PPEGMA and SS-PMETA surfaces were prepared, respectively, by thiol-initiated photopolymerization of poly(ethylene glycol)methyl ether methacrylate (PEGMA) and 2-(methacryloyloxy)ethyl trimethylammonium chloride (META). The antifouling SS-P(HEMA-b-SBMA) and SS-PPEGMA surfaces exhibit resistance to bacterial adhesion, while the SS-PMETA surface is bactericidal. Metal surfaces with thiol-terminated hyperbranches thus provide a versatile platform for tailoring surface functionalities. © 2013 The Royal Society of Chemistry.
Source Title: Polymer Chemistry
ISSN: 17599954
DOI: 10.1039/c3py00009e
Appears in Collections:Staff Publications

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