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On the mechanism of marine fouling-prevention performance of oil-containing silicone elastomers
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2022
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Source: Scientific Reports, 12(1)
[PDF-4.12 MB]
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Journal Title:Scientific Reports
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NOAA Program & Office:
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Description:For many decades, silicone elastomers with oil incorporated have served as fouling-release coating for marine applications. In a comprehensive study involving a series of laboratory-based marine fouling assays and extensive global field studies of up to 2-year duration, we compare polydimethylsiloxane (PDMS) coatings of the same composition loaded with oil via two different methods. One method used a traditional, one-pot pre-cure oil addition approach (o-PDMS) and another method used a newer post-cure infusion approach (i-PDMS). The latter displays a substantial improvement in biofouling prevention performance that exceeds established commercial silicone-based fouling-release coating standards. We interpret the differences in performance between one-pot and infused PDMS by developing a mechanistic model based on the Flory–Rehner theory of swollen polymer networks. Using this model, we propose that the chemical potential of the incorporated oil is a key consideration for the design of future fouling-release coatings, as the improved performance is driven by the formation and stabilization of an anti-adhesion oil overlayer on the polymer surface.
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Source:Scientific Reports, 12(1)
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DOI:
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ISSN:2045-2322
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Rights Information:CC BY
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Compliance:Library
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