Chemistry, Physics & Earth Sciences

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Publications produced by staff from the School of Chemistry, Physics & Earth Sciences.

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A versatile approach to grafting biofouling resistant coatings from polymeric membrane surfaces using an adhesive macroinitiator

(Royal Society of Chemistry, 2015-07-16) Ginic-Markovic, Milena ; Barclay, Thomas G ; Constantopoulos, Kristina Teresa ; Al-Ghami, Tawfig ; Blok, Andrew ; Markovic, Elda ; Ellis, Amanda Vera

Biofouling is a serious problem for any wetted structure, having a negative influence on applications as diverse as marine transport, implanted medical devices and water treatment. Here, we address this issue by creating a polydopamine-based coating on desalination reverse osmosis membranes incorporating a bromo-macroinitiator for subsequent polymerisation of sulfobetaine monomers into anti-biofouling polymer brushes. Surface characterisation using attenuated total reflectance-Fourier transform infrared spectroscopy and the water contact angle demonstrated the attachment of the polysulfobetaine brushes and that the hydrophilicity increased for the coated membranes. Using a macroinitiator formation time of ten minutes followed by polyzwitterion coating of one hour resulted in a 17% increase in water flux without significant effect on the salt rejection performance. These membranes also exhibited substantial suppression of protein and bacterial attachment of 69% and 88% respectively compared to unmodified membranes.