Journal
BIOFOULING
Volume 28, Issue 5, Pages 511-523Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927014.2012.690197
Keywords
microfouling; bacteria; diatoms; biofilms; macrofouling; barnacles; adhesion; antifouling; fouling-release; xerogels
Funding
- Office of Naval Research [N0014-09-1-0217, N00014-11-1-0032, N00014-09-1-0350]
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Five non-biocidal xerogel coatings were compared to two commercial non-biocidal coatings and a silicone standard with respect to antifouling (AF)/fouling-release (FR) characteristics. The formation and release of biofilm of the marine bacterium Cellulophaga lytica, the attachment and release of the microalga Navicula incerta, and the fraction removal and critical removal stress of reattached adult barnacles of Amphibalanus amphitrite were evaluated in laboratory assays. Correlations of AF/FR performance with surface characteristics such as wettability, surface energy, elastic modulus, and surface roughness were examined. Several of the xerogel coating compositions performed well against both microfouling organisms while the commercial coatings performed less well toward the removal of microalgae. Reattached barnacle adhesion as measured by critical removal stress was significantly lower on the commercial coatings when compared to the xerogel coatings. However, two xerogel compositions showed release of 89-100% of reattached barnacles. These two formulations were also tested in the field and showed similar results.
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