Indexed on: 20 Dec '18Published on: 20 Dec '18Published in: Langmuir
We synthesized a zwitterionic dopamine derivative ( ZW-DOPA) containing both catechol and amine groups, and we demonstrated excellent marine antifouling surface by controlling the oxidation of ZW-DOPA. The oxidation was mediated by deprotonation of catechol or addition of an oxidant (ammonium persulfate (AP) or sodium periodate (NaIO)). The oxidation and subsequent molecular transformation of ZW-DOPA was investigated over time by UV-Vis spectroscopy. Among the different oxidation conditions tested, NaIO-induced ZW-DOPA coating was the most efficient and successfully formed on various substrates, such as titanium dioxide, stainless steel, and nylon. Compared with uncoated substrates, ZW-DOPA-coated substrates showed high resistance to marine diatom adhesion. Considering the ease of use and substrate independence of the ZW-DOPA coating, this method shows promise as a basis for inhibiting marine fouling on a variety of substrates used in the marine industry and aquatic environments.