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• W3046121012 endingPage "101485" @default.
• W3046121012 startingPage "101485" @default.
• W3046121012 abstract "The existence of bacteria and fungi on surfaces can be a serious threat to health causing numerous infections. With these microorganisms developing resistance over the years, there is an increasing need to develop surfaces that can kill or inhibit the growth of bacteria and fungi. In this work, we report the fabrication of sulphonated poly (ether ether ketone) (SPEEK) and its copper composite films as promising antimicrobial materials and investigated the effects of fabricating surface structures (micro-pillars) on the films. The fabricated films were systematically characterized and it was observed that both SPEEK and SPEEK – Cu films possessed antimicrobial properties which initially killed all of E. coli within 15 min of contact. Over longer times, as the films aged, the SPEEK – Cu film still achieved over 2 log (for flat film) and 4 log (for micro-pillared film) reduction of E. coli within 1 h of contact and it showed significant fungal growth reduction for Saccharomyces cerevisiae (yeast) and Aspergillus niger with 2 h of contact. Micro-pillared films had a larger water contact angle (131°) in comparison to flat films (64°) which thus rendered it hydrophobic. It was also observed that these micro-pillared films showed better antimicrobial properties and better copper release than flat as a result of better exposure of copper particles on the top surface of micro-pillars. The fabricated films were also thermally stable and exhibited tensile strengths ranging from 50 to 160 MPa depending on the surface morphology and copper content. Furthermore, the films were found to be recyclable by dissolution in sulphuric acid and re-casting to form new films with replenished sulphonic acid groups in the polymer matrix and restored antimicrobial properties." @default.
• W3046121012 created "2020-08-03" @default.
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• W3046121012 date "2020-12-01" @default.
• W3046121012 modified "2023-10-16" @default.
• W3046121012 title "Recyclable antimicrobial sulphonated poly (ether ether ketone) – copper films: Flat vs micro-pillared surfaces" @default.
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• W3046121012 doi "https://doi.org/10.1016/j.mtcomm.2020.101485" @default.
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