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The effect of graphene-poly(methyl methacrylate) fibres on microbial growth

Matharu, RK; Porwal, H; Ciric, L; Edirisinghe, M; (2018) The effect of graphene-poly(methyl methacrylate) fibres on microbial growth. Interface Focus , 8 (3) 10.1098/rsfs.2017.0058. Green open access

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Abstract

A novel class of ultra-thin fibres, which affect microbial growth, were explored. The microbial properties of poly(methyl methacrylate) fibres containing 2, 4 and 8 wt% of graphene nanoplatelets (GNPs) were studied. GNPs were dispersed in a polymeric solution and processed using pressurized gyration. Electron microscopy was used to characterize GNP and fibre morphology. Scanning electron microscopy revealed the formation of beaded porous fibres. GNP concentration was found to dictate fibre morphology. As the GNP concentration increased, the average fibre diameter increased from 0.75 to 2.71 mm, while fibre porosity decreased. Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa were used to investigate the properties of 2, 4 and 8 wt% GNP-loaded fibres. GNP-loaded fibres (0 wt%) were used as the negative control. The fibres were incubated for 24 h with the bacteria; bacterial colony-forming units were enumerated by adopting the colony-counting method. The presence of 2 and 4 wt% GNP-loaded fibres promoted microbial growth, while 8 wt% GNP-loaded fibres showed antimicrobial activity. These results indicate that the minimum inhibitory concentration of GNPs required within a fibre is 8 wt%.

Type: Article
Title: The effect of graphene-poly(methyl methacrylate) fibres on microbial growth
Open access status: An open access version is available from UCL Discovery
DOI: 10.1098/rsfs.2017.0058
Publisher version: http://doi.org/10.1098/rsfs.2017.0058
Language: English
Additional information: Copyright © 2018 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Keywords: graphene, bacterial activity, gyration, nanomaterials, fibres, pressurized gyration
URI: http://discovery.ucl.ac.uk/id/eprint/10048475
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