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

Martinelli, Elisa; Suffredini, Marianna; Galli, Giancarlo; Glisenti, Antonella; Pettitt, Michala E.; Callow, Maureen E.; Callow, James A.; Williams, David N.; Lyall, Graeme

doi:10.1080/08927014.2011.584972

Cited by 121 publications

(92 citation statements)

References 46 publications

(53 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This investigation highlights the necessity of a generalized model that can reliably predict the forces/stresses acting on an organism within a parallel wall flow apparatus, i.e. at different specifications of the channel width, average flow velocity and organism dimensions, especially in the light of its wide use in bioadhesion and biofouling [26][27][28][29].…”

Section: Computational Fluid Dynamicsmentioning

confidence: 99%

“…Among these methods, flow channels have been common, ranging from microfluidic devices using laminar flows to test the adhesion of bacteria and microalgae [22,23] to larger devices used to assess diatom attachment across multiple microscope slides using turbulent flow regimes [24,25]. Flow channel-based adhesion assessment is also common in the study of biofouling-resistant and fouling-release coatings [26][27][28][29]. However, these studies do not investigate the actual drag force acting on the settled organisms and propose the wall shear stress generated in the channel as an estimate for the adhesion strength.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Experimental and computational analysis of a novel flow channel to assess the adhesion strength of sessile marine organisms

et al. 2015

View full text Add to dashboard Cite

ResearchCite this article: Dimartino S, Mather AV, Alestra T, Nawada S, Haber M. 2015 Experimental and computational analysis of a novel flow channel to assess the adhesion strength of sessile marine organisms. Bioadhesives produced by marine macroalgae represent a potential source of inspiration for the development of water-resistant adhesives. Assessing their adhesion strength, however, remains difficult owing to low volumes of adhesive material produced, low solubility and rapid curing time. These difficulties can be circumvented by testing the adhesion strength of macroalgae propagules attached to a substrate. In this paper, we present a simple, novel flow channel used to test the adhesion strength of the germlings of the fucalean alga Hormosira banksii to four substrates of biomedical relevance (PMMA, agar, gelatin and gelatin þ lipid). The adhesion strength of H. banksii germlings was found to increase in a time-dependent manner, with minimal adhesion success after a settlement period of 6 h and maximum adhesion strength achieved 24 h after initial settlement. Adhesion success increased most dramatically between 6 and 12 h settlement time, while no additional increase in adhesion strength was recorded for settlement times over 24 h. No significant difference in adhesion strength to the various substrates was observed. Computational fluid dynamics (CFD) was used to estimate the influence of fluid velocity and germling density on drag force acting on the settled organisms. CFD modelling showed that, on average, the drag force decreased with increasing germling number, suggesting that germlings would benefit from gregarious settlement behaviour. Collectively, our results contribute to a better understanding of the mechanisms allowing benthic marine organisms to thrive in hydrodynamically stressful environments and provide useful insights for further investigations.

show abstract

Section: Computational Fluid Dynamicsmentioning

confidence: 99%

mentioning

confidence: 99%

Experimental and computational analysis of a novel flow channel to assess the adhesion strength of sessile marine organisms

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Currently, concerning fluoropolymer-modified polysiloxane materials, preparation methods mainly include hydrosilylation, emulsion polymerization, atom transfer radical polymerization (ATRP), photopolymerization, and grafting methods [6][7][8][9][10][11][12][13][14]. Furukawa et al [6,7] utilized the hydrosilylation of fluorinated olefins with polyhydromethylsiloxane to synthesize a series of fluorosilicones and used them hydrosilylation of fluorinated olefins with polyhydromethylsiloxane to synthesize a series of fluorosilicones and used them as finishing agents for polyester fabrics.…”

Section: Introductionmentioning

confidence: 99%

“…Luo et al [9,10] used the ATRP technique to prepare a poly(dimethylsiloxane)-block-poly(methyl methacrylate)-block-poly(2,2,3,3,4,4,4-heptafluorobutyl methacrylate) triblock copolymer and poly(methacryloxypropyltrimethoxysilane-b-2,2,3,3,4,4,4-heptafluorobutyl methacrylate -grafted silica hybrid nanoparticles. Martinelli et al [11,12] prepared a series of amphiphilic diblock copolymers containing a poly(dimethylsiloxane) block and a PEGylated-fluoroalkyl-modified polystyrene block via ATRP and tested them as biofouling coatings. Novel photopolymerized network films on the basis of a polysiloxane matrix containing varied amounts of polyoxyethylene or perfluorohexylethyl dangling side chains were studied by Martinelli et al [13].…”

Section: Introductionmentioning

confidence: 99%

The Preparation and Properties of Fluoroacrylate-Modified Polysiloxane as a Fabric Coating Agent

Jiang

2018

Coatings

View full text Add to dashboard Cite

Polysiloxanes, which can add high softness and lubricity to treated textiles, have been proposed as softening post-finishing agents for fabric. However, the hydrophobicity of the finished fabric is not satisfactory. In this work, long-chain fluoroalkyl acrylate was used to modify the polysiloxane, aimed at improving hydrophobicity of the finished fabric and retaining its softness simultaneously. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectra ( 1 H/ 13 C NMR), and thermogravimetric analysis (TGA) were used to characterize the chemical structure and thermal stability of the as-prepared polymer. The modified polysiloxane was tested as a finishing agent. Its film morphologies on the fabric surface and on a silicon wafer were determined. Chemical compositions and performance properties of the finished fabric were investigated. By bonding long-chain fluoroalkyl, the modified polysiloxane presented good thermal stability. Due to the combined effect of the low surface free energy of the perfluorinated side chains and the relatively high surface roughness of the cotton fibers, the treated fabric had favorable hydrophobicity with a WCA of 144.7 • on its surface. In addition, their softness was increased, but the color remained unchanged.

show abstract

“…Various antifouling (AF) technologies have been developed over a number of decades (Finnie & Williams 2010), including UV irradiation, ultrasound, electric fields, foul-release polymeric coatings, and AF paints such as self-polishing systems (Loschau & Kratke 2005;Finnie & Williams 2010;Guo et al 2011Guo et al , 2012Martinelli et al 2011). The most common practice to protect marine surfaces has been to coat them with AF paint-containing biocides.…”

Section: Introductionmentioning

confidence: 99%

Mini-review: Molecular mechanisms of antifouling compounds

2013

View full text Add to dashboard Cite

Various antifouling (AF) coatings have been developed to protect submerged surfaces by deterring the settlement of the colonizing stages of fouling organisms. A review of the literature shows that effective AF compounds with specific targets are ones often considered non-toxic. Such compounds act variously on ion channels, quorum sensing systems, neurotransmitters, production/release of adhesive, and specific enzymes that regulate energy production or primary metabolism. In contrast, AF compounds with general targets may or may not act through toxic mechanisms. These compounds affect a variety of biological activities including algal photosynthesis, energy production, stress responses, genotoxic damage, immunosuppressed protein expression, oxidation, neurotransmission, surface chemistry, the formation of biofilms, and adhesive production/release. Among all the targets, adhesive production/release is the most common, possibly due to a more extensive research effort in this area. Overall, the specific molecular targets and the molecular mechanisms of most AF compounds have not been identified. Thus, the information available is insufficient to draw firm conclusions about the types of molecular targets to be used as sensitive biomarkers for future design and screening of compounds with AF potential. In this review, the relevant advantages and disadvantages of the molecular tools available for studying the molecular targets of AF compounds are highlighted briefly and the molecular mechanisms of the AF compounds, which are largely a source of speculation in the literature, are discussed.

show abstract

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

Cited by 121 publications

References 46 publications

Experimental and computational analysis of a novel flow channel to assess the adhesion strength of sessile marine organisms

Experimental and computational analysis of a novel flow channel to assess the adhesion strength of sessile marine organisms

The Preparation and Properties of Fluoroacrylate-Modified Polysiloxane as a Fabric Coating Agent

Mini-review: Molecular mechanisms of antifouling compounds

Contact Info

Product

Resources

About