Efficacy testing of nonbiocidal and fouling‐release coatings

Callow, Maureen E.; Callow, James A.; Conlan, Sheelagh L.; Clare, Anthony S.; Stafslien, Shane J.

doi:10.1002/9781118336144.ch10

Cited by 13 publications

(9 citation statements)

References 47 publications

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“…The microalga ( Navicula incerta ) assay was conducted using methods described elsewhere. , Briefly, coatings prepared in 24-well plates were used for assessments of diatom attachment and adhesion following 28 days of water immersion preconditioning in running tap water. A suspension with 4 × 10 5 cells/mL of N. incerta (adjusted to 0.03 OD at absorbance 660 nm) in Guillard’s F/2 medium was deposited into each well (1 mL per well) and cell attachment was encouraged by static incubation for 2 h under ambient conditions in the dark.…”

Section: Methodsmentioning

confidence: 99%

“…A detailed description of the marine bacterial retention and adhesion assays for evaluating fouling-release coatings can be found elsewhere. ,, Similar to the microalgal attachment and adhesion assay, 24-well plates were incubated statically at 28 °C for 24 h with a 1 mL/well of suspension consisting of the marine bacterium Cellulophaga lytica at 10 7 cells/mL concentration in ASW containing 0.5 peptone and 0.1 g/L yeast extract. The ASW growth medium was then removed and the coatings were subjected to water-jet treatments.…”

Section: Methodsmentioning

confidence: 99%

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Fouling-Release Performance of Silicone Oil-Modified Siloxane-Polyurethane Coatings

Galhenage

Hoffman

Silbert

et al. 2016

ACS Appl. Mater. Interfaces

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121

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The effect of incorporation of silicone oils into a siloxane-polyurethane fouling-release coatings system was explored. Incorporation of phenylmethyl silicone oil has been shown to improve the fouling-release performance of silicone-based fouling-release coatings through increased interfacial slippage. The extent of improvement is highly dependent upon the type and composition of silicone oil used. The siloxane-polyurethane (SiPU) coating system is a tough fouling-release solution, which combines the mechanical durability of polyurethane while maintaining comparable fouling-release performance with regard to commercial standards. To further improve the fouling-release performance of the siloxane-PU coating system, the use of phenylmethyl silicones oils was studied. Coatings formulations were prepared incorporating phenylmethyl silicone oils having a range of compositions and viscosities. Contact angle and surface energy measurements were conducted to evaluate the surface wettability of the coatings. X-ray photoelectron spectroscopy (XPS) depth profiling experiments demonstrated self-stratification of silicone oil along with siloxane to the coating-air interface. Several coating formulations displayed improved or comparable fouling-release performance to commercial standards during laboratory biological assay tests for microalgae (Navicula incerta), macroalgae (Ulva linza), adult barnacles (Balanus amphitrite syn. Amphibalanus amphitrite), and mussels (Geukensia demissa). Selected silicone-oil-modified siloxane-PU coatings also demonstrated comparable fouling-release performance in field immersion trials. In general, modifying the siloxane-PU fouling-release coatings with a small amount (1-5 wt % basis) of phenylmethyl silicone oil resulted in improved performance in several laboratory biological assays and in long-term field immersion assessments.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Fouling-Release Performance of Silicone Oil-Modified Siloxane-Polyurethane Coatings

Galhenage

Hoffman

Silbert

et al. 2016

ACS Appl. Mater. Interfaces

Self Cite

121

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“…Detailed methods to assess the growth and release of microalgal (N. incerta) diatom cells can be found elsewhere Callow ME. et al 2014).…”

Section: Microalga 2 H Cell Attachment and Release (Navicula Incerta)mentioning

confidence: 99%

Surface modifying amphiphilic additives and their effect on the fouling-release performance of siloxane-polyurethane coatings

et al. 2021

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In this work, surface-modifying amphiphilic additives (SMAAs) were synthesized via hydrosilylation using various polymethylhydrosiloxanes (PMHS) and allyl-terminated polyethylene glycol monomethyl ethers (APEG) of varying molecular weight. The synthesized additives were incorporated into a hydrophobic, self-stratifying siloxane-polyurethane (SiPU) coating system to produce an amphiphilic surface. Contact angle experiments and atomic force microscopy (AFM), in a dry and hydrated state, were performed to assess change in surface wettability and morphology. The antifouling and fouling-release (AF/FR) performances were evaluated by performing laboratory biological assays using the marine bacteria Cellulophaga lytica, the microalga Navicula incerta, the macroalga Ulva linza, the barnacle Amphibalanus amphitrite, and the marine mussel, Geukensia demissa. Several of the formulations showed improved AF/FR performance versus the base SiPU and performed better than some of the commercial standard marine coatings. Formulations containing SMAAs with a low grafting density of relatively high molecular weight PEG chains had the best performance overall.

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“…Removal of permanently attached juveniles (7 days post metamorphosis) from coated slides (n=6 per formulation) by hydrodynamic shear was carried out using a fully turbulent flow cell at Newcastle University (Callow et al 2014). The flow cell simulates the turbulent boundary layer created by ships when underway.…”

Section: Flow Cellmentioning

confidence: 99%

Effects of surface-active block copolymers with oxyethylene and fluoroalkyl side chains on the antifouling performance of silicone-based films

et al. 2016

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Block copolymers made from a poly(dimethyl siloxane) (Si) and a poly(meth)acrylate carrying oxyethylene (EG) or fluoroalkyl (AF) side chains were synthesized and incorporated as surface-active components into a silicone matrix to produce cross-linked films with different surface hydrophilicity/phobicity. Near-edge X-ray absorption fine structure (NEXAFS) studies showed that film surfaces containing Si-EG were largely populated by the siloxane, with the oxyethylene chains present only to a minor extent. In contrast, the fluorinated block was selectively segregated to the polymer-air interface in films containing Si-AF as probed by NEXAFS and X-ray photoelectron spectroscopy (XPS) analyses. Such differences in surface composition were reflected in the biological performance of the coatings. While the films with Si-EG showed a higher removal of both Ulva linza sporelings and Balanus amphitrite juveniles than the silicone control, those with Si-AF exhibited excellent antifouling properties, preventing the settlement of cyprids of B. amphitrite.

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Efficacy testing of nonbiocidal and fouling‐release coatings

Cited by 13 publications

References 47 publications

Fouling-Release Performance of Silicone Oil-Modified Siloxane-Polyurethane Coatings

Fouling-Release Performance of Silicone Oil-Modified Siloxane-Polyurethane Coatings

Surface modifying amphiphilic additives and their effect on the fouling-release performance of siloxane-polyurethane coatings

Effects of surface-active block copolymers with oxyethylene and fluoroalkyl side chains on the antifouling performance of silicone-based films

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