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Unhindered copper uptake by glutaraldehyde-polyethyleneimine coatings in an artificial seawater model system with adsorbed swollen polysaccharides and competing ligand EDTA
University of South Australia, Australia.
University of South Australia, Australia.
RISE - Research Institutes of Sweden, Bioscience and Materials. University of South Australia, Australia.ORCID iD: 0000-0003-1075-1441
University of South Australia, Australia; University College London, Australia.
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2017 (English)In: Biofouling (Print), ISSN 0892-7014, E-ISSN 1029-2454, Vol. 33, no 2, p. 184-194Article in journal (Refereed) Published
Abstract [en]

Shortly after a surface is submerged in the sea, a conditioning film is generally formed by adsorption of organic molecules, such as polysaccharides. This could affect transport of molecules and ions between the seawater and the surface. An artificial seawater model system was developed to understand how adsorbed polysaccharides impact copper binding by glutaraldehyde-crosslinked polyethyleneimine coatings. Coating performance was also determined when competed against copper-chelating EDTA. Polysaccharide adsorption and copper binding and distribution were investigated using advanced analytical techniques, including depth-resolved time-of-flight secondary ion mass spectroscopy, grazing incidence X-ray absorption near-edge spectroscopy, quartz crystal microbalance with dissipation monitoring and X-ray photoelectron spectroscopy. In artificial seawater, the polysaccharides adsorbed in a swollen state that copper readily penetrated and the glutaraldehyde-polyethyleneimine coatings outcompeted EDTA for copper binding. Furthermore, the depth distribution of copper species was determined with nanometre precision. The results are highly relevant for copper-binding and copper-releasing materials in seawater. 

Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2017. Vol. 33, no 2, p. 184-194
Keywords [en]
Antifouling, biocidal metals, copper chelation, kinetics, polyethyleneimine, selective binding, absorption, chelation, chemical binding, chemical compound, coating, copper, EDTA, model test, pesticide, polymer, polysaccharide, seawater, cross linking reagent, edetic acid, glutaraldehyde, ion, ligand, sea water, adsorption, biofouling, chemical model, chemistry, prevention and control, surface property, water pollution, Cross-Linking Reagents, Glutaral, Ions, Ligands, Models, Chemical, Polysaccharides, Surface Properties, Water Pollution, Chemical
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Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-38647DOI: 10.1080/08927014.2017.1284204Scopus ID: 2-s2.0-85012093610OAI: oai:DiVA.org:ri-38647DiVA, id: diva2:1314731
Available from: 2019-05-09 Created: 2019-05-09 Last updated: 2019-05-09Bibliographically approved

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