Stainless steel surfaces with thiol-terminated hyperbranched polymers for functionalization via thiol-based chemistry


Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Yang, WJ; Neoh, KG; Kang, ET; Lay-Ming Teo, S; Rittschof, D

Published Date

  • January 1, 2013

Published In

Volume / Issue

  • 4 / 10

Start / End Page

  • 3105 - 3115

Electronic International Standard Serial Number (EISSN)

  • 1759-9962

International Standard Serial Number (ISSN)

  • 1759-9954

Digital Object Identifier (DOI)

  • 10.1039/c3py00009e

Citation Source

  • Scopus