title: Antibacterial inorganic-organic hybrid coatings on stainless steel via consecutive surface-initiated atom transfer radical polymerization for biocorrosion prevention.
abstract: To enhance the corrosion resistance of stainless steel (SS) and to impart its surface with antibacterial functionality for inhibiting biofilm formation and biocorrosion, well-defined inorganic-organic hybrid coatings, consisting of a polysilsesquioxane inner layer and quaternized poly(2-(dimethyamino)ethyl methacrylate) (P(DMAEMA)) outer blocks, were prepared via successive surface-initiated atom transfer radical polymerization (ATRP) of 3-(trimethoxysilyl)propyl methacrylate (TMSPMA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA). The cross-linked P(TMASPMA), or polysilsesquioxane, inner layer provided a durable and resistant coating to electrolytes. The pendant tertiary amino groups of the P(DMAEMA) outer block were quaternized with alkyl halide to produce a high concentration of quaternary ammonium groups with biocidal functionality. The so-synthesized inorganic-organic hybrid coatings on the SS substrates exhibited good anticorrosion and antibacterial effects and inhibited biocorrosion induced by sulfate-reducing bacteria (SRB) in seawater media, as revealed by antibacterial assay and electrochemical analyses, and they are potentially useful to steel-based equipment under harsh industrial and marine environments.
authors.affiliation: College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
authors.forename: S J
authors.initials: SJ
authors.lastname: Yuan
authors.forename: S O
authors.initials: SO
authors.lastname: Pehkonen
authors.forename: Y P
authors.initials: YP
authors.lastname: Ting
authors.forename: K G
authors.initials: KG
authors.lastname: Neoh
authors.forename: E T
authors.initials: ET
authors.lastname: Kang
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology*; D002470:Cell Survival / Q000187:drug effects; D003343:Corrosion; D045285:Desulfovibrio desulfuricans / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D004563:Electrochemistry; D055772:Green Chemistry Technology; D006219:Halogens / Q000737:chemistry; D006868:Hydrolysis; D009930:Organic Chemicals / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry; D013193:Stainless Steel / Q000737:chemistry* / Q000494:pharmacology*; D013499:Surface Properties
chemical_list: D000900:Anti-Bacterial Agents; D006219:Halogens; D009930:Organic Chemicals; D011108:Polymers; D012821:Silanes; D013193:Stainless Steel