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The impact of coating hardness on the anti-barnacle efficacy of an embedded antifouling biocide
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik. University of Gothenburg, Sweden.ORCID iD: 0000-0002-8945-9904
University of Gothenburg, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. University of Gothenburg, Sweden.ORCID iD: 0000-0002-9377-8924
2013 (English)In: Biofouling (Print), ISSN 0892-7014, E-ISSN 1029-2454, Vol. 29, no 7, p. 763-773Article in journal (Refereed) Published
Abstract [en]

The efficacy of antifouling coatings designed to minimise the release of biocide, either by embedded (non-covalent) or tethered (covalently bonded) biocides, relies on sufficient bioavailability of the active compound upon contact between the organism and the coating. This investigation is focused on whether coating hardness affects the efficacy of embedded coating systems. Two experimental, non-eroding and waterborne latex paint formulations composed mainly of polystyrene (PS) or polyvinyl versatate (PV) were chosen for their difference in mechanical properties measured in terms of Buchholz indentation resistance. Ivermectin was added to both formulations to a final concentration of 0.1% (w/v) and the steady state release rate was measured according to ISO 15181 at between 34 and 70 ng cm-2 day-1 for both formulations. Field trials conducted over 3 months showed significant differences in anti-barnacle efficacy between the formulations despite their similar release profiles. The softer PV coating showed complete anti-barnacle efficacy, ie no barnacles were detected, while the harder PS coating showed no efficacy against barnacle colonisation during the same time period. The results indicate a new antifouling strategy whereby a route of intoxication is triggered by the organism itself upon interaction with the coating and its embedded biocide. This finding opens new possibilities in controlling macrofouling by low emission antifouling coatings.

Place, publisher, year, edition, pages
2013. Vol. 29, no 7, p. 763-773
Keywords [en]
barnacle, coating hardness, coating penetration, contact active antifouling, embedded biocidelow emission antifouling
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6544DOI: 10.1080/08927014.2013.804511Scopus ID: 2-s2.0-84880510613Local ID: 23825OAI: oai:DiVA.org:ri-6544DiVA, id: diva2:964382
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2023-05-25Bibliographically approved

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Pinori, EmilianoBerglin, Mattias

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