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Chitosan-zinc oxide nanocomposite coatings for the prevention of marine biofouling
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Funktionella material, FNM.ORCID-id: 0000-0002-0074-3504
2017 (Engelska)Ingår i: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 168, s. 408-417Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Marine biofouling is a worldwide problem affecting maritime industries. Global concerns about the high toxicity of antifouling paints have highlighted the need to develop less toxic antifouling coatings. Chitosan is a natural polymer with antimicrobial, antifungal and antialgal properties that is obtained from partial deacetylation of crustacean waste. In the present study, nanocomposite chitosan-zinc oxide (chitosan-ZnO) nanoparticle hybrid coatings were developed and their antifouling activity was tested. Chitosan-ZnO nanoparticle coatings showed anti-diatom activity against Navicula sp. and antibacterial activity against the marine bacterium Pseudoalteromonas nigrifaciens. Additional antifouling properties of the coatings were investigated in a mesocosm study using tanks containing natural sea water under controlled laboratory conditions. Each week for four weeks, biofilm was removed and analysed by flow cytometry to estimate total bacterial densities on the coated substrates. Chitosan-ZnO hybrid coatings led to better inhibition of bacterial growth in comparison to chitosan coatings alone, as determined by flow cytometry. This study demonstrates the antifouling potential of chitosan-ZnO nanocomposite hybrid coatings, which can be used for the prevention of biofouling. (C) 2016 Elsevier Ltd. All rights reserved.

Ort, förlag, år, upplaga, sidor
Elsevier, 2017. Vol. 168, s. 408-417
Nyckelord [en]
Antifouling, Chitosan, ZnO nanoparticles, Nanocomposite coating, Biofilm
Nationell ämneskategori
Nanoteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-201222DOI: 10.1016/j.chemosphere.2016.10.033ISI: 000391897500049Scopus ID: 2-s2.0-84993978154OAI: oai:DiVA.org:kth-201222DiVA, id: diva2:1075444
Anmärkning

QC 20170222

Tillgänglig från: 2017-02-20 Skapad: 2017-02-20 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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