Chitosan-zinc oxide nanocomposite coatings for the prevention of marine biofouling

Laila Al-Naamani, Sergey Dobretsov, Joydeep Dutta, J. Grant Burgess

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)408-417
Number of pages10
JournalChemosphere
Volume168
DOIs
Publication statusPublished - Feb 1 2017

Fingerprint

Biofouling
Zinc Oxide
Nanocomposites
biofouling
Chitosan
Zinc oxide
coating
antifouling
zinc
oxide
Coatings
Flow cytometry
flow cytometry
Nanoparticles
Flow Cytometry
Pseudoalteromonas
Antifouling paint
Diatoms
Paint
Natural polymers

Keywords

  • Antifouling
  • Biofilm
  • Chitosan
  • Nanocomposite coating
  • ZnO nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Chitosan-zinc oxide nanocomposite coatings for the prevention of marine biofouling. / Al-Naamani, Laila; Dobretsov, Sergey; Dutta, Joydeep; Burgess, J. Grant.

In: Chemosphere, Vol. 168, 01.02.2017, p. 408-417.

Research output: Contribution to journalArticle

Al-Naamani, Laila ; Dobretsov, Sergey ; Dutta, Joydeep ; Burgess, J. Grant. / Chitosan-zinc oxide nanocomposite coatings for the prevention of marine biofouling. In: Chemosphere. 2017 ; Vol. 168. pp. 408-417.
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