Marine Fouling Release Silicone/Carbon Nanotube Nanocomposite Coatings: On the Importance of the Nanotube Dispersion State

Beigbeder, Alexandre; Mincheva, Rosica; Pettitt, Michala E.; Callow, Maureen E.; Callow, James A.; Claes, Michaël; Dubois, Philippe

doi:10.1166/jnn.2010.2185

Cited by 51 publications

(20 citation statements)

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“…To obtain a fine dispersion of CNT in the PDMS matrix a masterbatch approach after Beigbeder et al (2010) was followed. Namely, a pre-dispersion of 0.5 wt% CNT in an addition-curing PDMS (BioCyl part A) was diluted with bis(silanol)-terminated PDMS and then mixed with block copolymer Sz6 and the condensation crosslinker ES40.…”

Section: Preparation Of Two-layer Coatingsmentioning

confidence: 99%

Amphiphilic block copolymer/poly(dimethylsiloxane) (PDMS) blends and nanocomposites for improved fouling-release

et al. 2011

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Amphiphilic diblock copolymers, Sz6 and Sz12, consisting of a poly(dimethylsiloxane) block (average degree of polymerisation ¼ 132) and a PEGylated-fluoroalkyl modified polystyrene block (Sz, average degree of polymerisation ¼ 6, 12) were prepared by atom transfer radical polymerization (ATRP). Coatings were obtained from blends of either block copolymer (1-10 wt%) with a poly(dimethylsiloxane) (PDMS) matrix. The coating surface presented a simultaneous hydrophobic and lipophobic character, owing to the strong surface segregation of the lowest surface energy fluoroalkyl chains of the block copolymer. Surface chemical composition and wettability of the films were affected by exposure to water. Block copolymer Sz6 was also blended with PDMS and a 0.1 wt% amount of multiwall carbon nanotubes (CNT). The excellent fouling-release (FR) properties of these new coatings against the macroalga Ulva linza essentially resulted from the inclusion of the amphiphilic block copolymer, while the addition of CNT did not appear to improve the FR properties.

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Section: Preparation Of Two-layer Coatingsmentioning

confidence: 99%

Amphiphilic block copolymer/poly(dimethylsiloxane) (PDMS) blends and nanocomposites for improved fouling-release

et al. 2011

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“…Although CNTs are recognized to be toxic, the matrix does not release CNT which is a significant feature in relation to any ecotoxilogical issues associated with CNTs. For further details of these coatings, the reader can refer to Beigbeder et al (2008aBeigbeder et al ( , b, 2009Beigbeder et al ( , 2010. In order to support the experiments, one more coating and two different uncoated surfaces were included in the measurements as reference.…”

Section: Experimental Set-upmentioning

confidence: 99%

Turbulent boundary layer measurements over flat surfaces coated by nanostructured marine antifoulings

Ünal

Atlar

2012

Exp Fluids

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Whilst recent developments of nanotechnology are being exploited by chemists and marine biologists to understand how the completely environmentally friendly foul release coatings can control marine biofouling and how they can be developed further, the understanding of the hydrodynamic performances of these new generation coatings is being overlooked. This paper aims to investigate the relative boundary layer, roughness and drag characteristics of some novel nanostructured coatings, which were developed through a multi-European and multi-disciplined collaborative research project AMBIO (2010), within the framework of turbulent flows over rough surfaces. Zero-pressure-gradient, turbulent boundary layer flow measurements were conducted over flat surfaces coated with several newly developed nanostructured antifouling paints, along with some classic reference surfaces and a state-of-the-art commercial coating, in the Emerson Cavitation Tunnel (ECT) of Newcastle University. A large flat plane test bed that included interchangeable flat test sections was used for the experiments. The boundary layer data were collected with the aid of a two-dimensional DANTEC Laser Doppler Velocimetry (LDV) system. These measurements provided the main hydrodynamic properties of the newly developed nanostructured coatings including local skin friction coefficients, roughness functions and Reynolds stresses. The tests and subsequent analysis indicated the exceptionally good frictional properties of all coatings tested, in particular, the drag benefit of some new nanostructured coatings in the Reynolds number range investigated. The rapidly decreasing roughness function trends of AKZO19 and AKZO20 as the k þ s increases were remarkable along with the dissimilar roughness function character of all tested coatings to the well-known correlation curves warranting further research at higher Reynolds numbers. The wall similarity concept for the Reynolds stresses was only validated for the transitionally rough surfaces from ðy þ eÞ þ % 100 up to the end of the boundary layer.

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“…Meanwhile, the speed of biomass accumulation for each coating was also different in the first two weeks. It seemed that PDMS (12) and PDMS (26) had the largest accumulation speed, but three other coatings (PDMS (29), PDMS (32) and PDMS (58), accumulated more biomass in the first three days. These observations suggested that the compositional change and its dynamics in the tested biofilms were modulated by the nano-fillers.…”

Section: Biomass Determinationmentioning

confidence: 99%

“…could reach 99.9% and 99.8% in 60 min, respectively. Beigbeder A et al [12] found slight addition of multiwall carbon nanotubes in a silicone matrix can dramatically increase the ability to hinder marine alga Ulva and barnacle. Chen TY et al [13] found that addition of silicone oil in a low surface energy coating leads to apparent less attachment of barnacle larvae but little effect on algae's attachment.…”

Section: Introductionmentioning

confidence: 99%

Using Barnacle-Specific Primers to Quantify Larva Attachment on Nano-Filled Coatings during the Early Stages of Marine Biofouling

Yan

Guo

Zhang

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This study tried to set up an approach to quantify the attached barnacle larvae in marine biofilms. Biofilms were collected from nano-filled coatings that previously characterized with different antifouling scores for 3-months. Quantification was achieved by 18S rDNA copy number measurement in quantitative real-time PCR (qPCR) using barnacle-species specific PCR (polymerase chain reaction) primers. Interestingly, the coatings with best anti-fouling scores were not the ones with less barnacle larva attachment in the early stage of marine biofouling, suggesting that some nano-filled coating be able to attract barnacle larvae's attachment but can prevent their further growth either by directly inhibiting the growth or evacuating the larvae through modulated biofilm dynamics, and the relative amount of barnacle larvae attachment cannot be regarded as a prediction for long-term antifouling efficacy of a coating.

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Marine Fouling Release Silicone/Carbon Nanotube Nanocomposite Coatings: On the Importance of the Nanotube Dispersion State

Cited by 51 publications

References 0 publications

Amphiphilic block copolymer/poly(dimethylsiloxane) (PDMS) blends and nanocomposites for improved fouling-release

Amphiphilic block copolymer/poly(dimethylsiloxane) (PDMS) blends and nanocomposites for improved fouling-release

Turbulent boundary layer measurements over flat surfaces coated by nanostructured marine antifoulings

Using Barnacle-Specific Primers to Quantify Larva Attachment on Nano-Filled Coatings during the Early Stages of Marine Biofouling

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