A novel biofilm channel for evaluating the adhesion of diatoms to non-biocidal coatings

Finlay, John A.; Schultz, Michael P.; Cone, Gemma; Callow, Maureen E.; Callow, James A.

doi:10.1080/08927014.2013.777046

Cited by 34 publications

(18 citation statements)

References 44 publications

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“…These data suggest that, in contrast to SBMA, incorporation of CBMA did improve the AF performance of the underlying LMA coating. This differs from the results of other studies, which have found that pure SBMA self-assembled-monolayers (SAMs) performed better than similar CBMA surfaces in AF assays using the same diatom species (Finlay et al 2013;Bauer et al 2016).…”

Section: Diatom Adhesion / Ease-of-releasecontrasting

confidence: 99%

“…Inclusion of CBMA, on the other hand, did not affect surface roughness to the same degree, although it did lead to increased Young's modulus and reduced AFM tip adhesion compared to both unmodified LMA and the SBMA-modified coatings. These differences in the effects of the two zwitterions on surface properties would appear to explain why the results are different from similar experiments conducted using pure zwitterionic SAMs (Finlay et al 2013;Bauer et al 2016).…”

Section: Effectiveness Of Sbma and Cbma As Additives To The Lma Polymcontrasting

confidence: 67%

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Marine antifouling performance of polymer coatings incorporating zwitterions

et al. 2017

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Zwitterionic materials display antifouling promise, but their potential in marine anti-biofouling is still largely unexplored. This study evaluates the effectiveness of incorporating small quantities (0-20% on a molar basis) of zwitterions as sulfobetaine methacrylate (SBMA) or carboxybetaine methacrylate (CBMA) into lauryl methacrylate-based coatings whose relatively hydrophobic nature encourages adhesion of the diatom Navicula incerta, a common microfouling organism responsible for the formation of 'slime'. This approach allows potential enhancements in antifouling afforded by zwitterion incorporation to be easily quantified. The results suggest that the incorporation of CBMA does provide a relatively minor enhancement in fouling-release performance, in contrast to SBMA which does not display any enhancement. Studies with coatings incorporating mixtures of varying ratios of the cationic monomer [2-(methacryloyloxy)ethyl]trimethylammonium chloride and the anionic monomer (3-sulfopropyl)methacrylate, which offer a potentially lower cost approach to the incorporation of anionic and cationic charge, suggest these monomers impart little significant effect on biofouling.

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Section: Diatom Adhesion / Ease-of-releasecontrasting

confidence: 99%

Section: Effectiveness Of Sbma and Cbma As Additives To The Lma Polymcontrasting

confidence: 67%

Marine antifouling performance of polymer coatings incorporating zwitterions

et al. 2017

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“…Attachment strengths for both organisms have been coupled to substrate wettability in a number of studies, but usually with a trend in the opposite direction between the two species. While for diatoms, adhesion was seen to be lower on hydrophilic surfaces (Finlay et al 2010, Finlay et al 2013, Schilp et al 2007, the general picture is that the removal of settled spores of U. linza in a flow channel followed a clear trend of lower adhesion (i.e.…”

Section: Adhesion Strength Of U Linza and N Incertamentioning

confidence: 94%

Antifouling properties of oligo(lactose)-based self-assembled monolayers

et al. 2015

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The antifouling properties of oligo(lactose)-based self-assembled monolayers (SAMs), using four different proteins, zoospores of the green alga Ulva linza and cells of the diatom Navicula incerta, were investigated. The SAM-forming alkylthiols, which contained 1, 2 or 3 lactose units, showed significant variation in antifouling properties, with no differences in wettability.Non-specific adsorption of albumin and pepsin was low on all surfaces. Adsorption of lysozyme and fibrinogen decreased with increasing number of lactose units in the SAM, in agreement with the generally observed phenomenon that thicker hydrated layers provide higher barriers to protein adsorption. Settlement of spores of U. linza followed an opposite trend, being greater on the bulkier, more hydrated SAMs. These SAMs are more ordered for the larger saccharide units, and it is therefore hypothesized that the degree of order, and differences in crystallinity or stiffness between the surfaces, is an important parameter regulating spore settlement on these surfaces.

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“…A field study in which AF and fouling-release (FR) ship hull coatings were exposed to both static and dynamic conditions revealed a higher abundance of diatoms and greater biofilm adhesion strength on coatings exposed under dynamic conditions compared to those exposed to static conditions (Zargiel & Swain 2014). Finlay et al (2013) studied the settlement and adhesion of a biofilm of Navicula incerta grown under static and dynamic conditions in the laboratory. Increasing the dynamic conditions influenced both biofilm development and the adhesion strength of the diatom.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Diatom community structure on in-service cruise ship hulls

et al. 2014

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Diatoms are an important component of marine biofilms found on ship hulls. However, there are only a few published studies that describe the presence and abundance of diatoms on ships, and none that relate to modern ship hull coatings. This study investigated the diatom community structure on two in-service cruise ships with the same cruise cycles, one coated with an antifouling (AF) system (copper self-polishing copolymer) and the other coated with a silicone fouling-release (FR) system. Biofilm samples were collected during dry docking from representative areas of the ship and these provided information on the horizontal and vertical zonation of the hull, and intact and damaged coating and niche areas. Diatoms from the genera Achnanthes, Amphora and Navicula were the most common, regardless of horizontal ship zonation and coating type. Other genera were abundant, but their presence was more dependent on the ship zonation and coating type. Samples collected from damaged areas of the hull coating had a similar community composition to undamaged areas, but with higher diatom abundance. Diatom fouling on the niche areas differed from that of the surrounding ship hull and paralleled previous studies that investigated differences in diatom community structure on static and dynamically exposed coatings; niche areas were similar to static immersion and the hull to dynamic immersion. Additionally, diatom richness was greater on the ship with the FR coating, including the identification of several new genera to the biofouling literature, viz. Lampriscus and Thalassiophysa. These results are the first to describe diatom community composition on in-service ship hulls coated with a FR system. This class of coatings appears to have a larger diatom community compared to copper-based AF systems, with new diatom genera that have the ability to stick to ship hulls and withstand hydrodynamic forces, thus creating the potential for new problematic species in the biofilm.

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A novel biofilm channel for evaluating the adhesion of diatoms to non-biocidal coatings

Cited by 34 publications

References 44 publications

Marine antifouling performance of polymer coatings incorporating zwitterions

Marine antifouling performance of polymer coatings incorporating zwitterions

Antifouling properties of oligo(lactose)-based self-assembled monolayers

Diatom community structure on in-service cruise ship hulls

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