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    In-Situ Surface Modification of Terpinen-4-ol Plasma Polymers for Increased Antibacterial Activity

    Year: 2020

    Journal: Materials, Volume 13, FEB 1

    Authors: Kumar, Avishek; Al-Jumaili, Ahmed; Bazaka, Kateryna; Mulvey, Peter; Warner, Jeffrey; Jacob, Mohan, V

    Organizations: Australian Research CouncilAustralian Research Council [DE130101550]

    Keywords: in-situ polymer surface modification; ZnO functionalization; plasma polymers; antibacterial coatings

    Surface modification of thin films is often performed to enhance their properties. In this work, in situ modification of Terpinen-4-ol (T4) plasma polymer is carried out via simultaneous surface functionalization and nanoparticle immobilization. Terpinen-4-ol plasma polymers surface were decorated with a layer of ZnO nanoparticles in an oxygen plasma environment immediately after polymer deposition. A combination of hydrophilic modification and ZnO nanoparticle functionalization of the T4 polymer surface led to an enhancement in antibacterial properties by factor of 3 (from 0.75 to 0.25 CFU.mm(-2)). In addition, ZnO nanoparticle-modified coatings demonstrated improved UV absorbing characteristics in the region of 300-400 nm by 60% relative to unmodified coatings. The ZnO modified coatings were transparent in the visible region of 400-700 nm. The finding points towards the potential use of ZnO nanoparticle-modified T4 plasma polymers as optically transparent UV absorbing coatings.
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