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Jarvis K.L.,Mawson InstituteUniversity of South AustraliaMawson Lakes5095South AustraliaAustralia | Majewski P.,Mawson InstituteUniversity of South AustraliaMawson Lakes5095South AustraliaAustralia
Plasma Processes and Polymers | Year: 2014

Plasma polymerized allylamine films were deposited onto quartz particles for the removal of humic acid, a common water contaminant. Allylamine flow rates of 6.6 and 11.5 standard cubic centrimetres per minute (sccm) were used and the mass of particles varied from 50 to 500g. At an allylamine flow rate of 6.6sccm, the atomic concentration of carbon and nitrogen decreased with increasing mass of particles. The isoelectric point and number of positively charged amine groups increased as the allylamine flow rate was increased and/or the mass of particles coated was decreased. Greater humic acid removal was achieved by increasing the allylamine flow rate and/or decreasing the mass of particles coated, which will have important implications for its use in water purification. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Michl T.D.,Ian Wark Research InstituteUniversity of South AustraliaMawson Lakes5095South AustraliaAustralia | Coad B.R.,Mawson InstituteUniversity of South AustraliaMawson Lakes5095South AustraliaAustralia | Husler A.,Ian Wark Research InstituteUniversity of South AustraliaMawson Lakes5095South AustraliaAustralia | Valentin J.D.P.,Mawson InstituteUniversity of South AustraliaMawson Lakes5095South AustraliaAustralia | And 2 more authors.
Plasma Processes and Polymers | Year: 2016

In this work, we aimed to understand the key properties that confer antibacterial activity to chlorinated plasma polymers, by investigating plasma polymers deposited from a series of chlorinated precursor molecules and also investigating the effect of plasma conditions. Results revealed that only precursors with a Cl/C ratio ≥1.5 generate effective antibacterial coatings, whereas the coating thickness is irrelevant. Furthermore there is a "sweet spot" in process conditions to generate coatings with optimal antimicrobial activity. Lastly, we investigated the release of chlorinated fragments and attenuation of the surface-active antibacterial properties of the chlorinated plasma polymers by overcoating them with a perfluorinated plasma polymer. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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