Preparation and characterisation of silicone-based coatings filled with carbon nanotubes and natural sepiolite and their application as marine fouling-release coatings

This article reports on the preparation and partial characterisation of silicone-based coatings filled with low levels of either synthetic multiwall carbon nanotubes (MWCNTs) or natural sepiolite (NS). The antifouling and fouling-release properties of these coatings were explored through laboratory assays involving representative soft-fouling (Ulva) and hard-fouling (Balanus) organisms. The bulk mechanical properties of the coatings appeared unchanged by the addition of low amounts of filler, in contrast to the surface properties, which were modified on exposure to water. The release of Ulva sporelings (young plants) was improved by the addition of low amounts of both NS and MWCNTs. The most profound effect recorded was the significant reduction of adhesion strength of adult barnacles growing on a silicone elastomer containing a small amount (0.05%) of MWCNTs. All the data indicate that independent of the bulk properties, the surface properties affect settlement, and more particularly, the fouling-release behaviour, of the filled materials.

[1]  G. F. Humphrey,et al.  New spectrophotometric equations for determining chlorophylls a, b, c1 and c2 in higher plants, algae and natural phytoplankton , 1975 .

[2]  Paul Gatenholm,et al.  Coating Modulus and Barnacle Bioadhesion , 2003, Biofouling.

[3]  G. Swain,et al.  Structure-Property Relationships of Silicone Biofouling-Release Coatings: Effect of Silicone Network Architecture on Pseudobarnacle Attachment Strengths , 2003, Biofouling.

[4]  Swelling of sodium chloride filled polybutadiene networks in water, water/ acetone and water/THF mixtures , 1998 .

[5]  M. Khorasani,et al.  Wettability of porous polydimethylsiloxane surface: morphology study , 2005 .

[6]  J. E. Mark,et al.  An investigation of the properties of poly(dimethylsiloxane)-bioinspired silica hybrids , 2006 .

[7]  Xiaobo Liu,et al.  Processing and properties of MWNT/HDPE composites , 2004 .

[8]  Q. Jia,et al.  Characterization and properties of sepiolite/polyurethane nanocomposites , 2007 .

[9]  A. Clare,et al.  Balanus amphitrite or Amphibalanus amphitrite? A note on barnacle nomenclature , 2008, Biofouling.

[10]  R. E. Smallman,et al.  An assessment of high voltage electron microscopy (HVEM). An invited review , 1977 .

[11]  D. Crisp,et al.  THE ORIENTATION AND DISTRIBUTION OF BARNACLES AT SETTLEMENT WITH PARTICULAR REFERENCE TO SURFACE CONTOUR , 1954 .

[12]  A. Morales,et al.  Structural and optical properties of polypropylene–montmorillonite nanocomposites , 2007 .

[13]  G. Swain,et al.  Observations of Barnacle Detachment from Silicones using High-Speed Video , 2005 .

[14]  Guo-gang Zhao,et al.  Electroless Plating of Ni-P-CNTs Composite Coating , 2004 .

[15]  J. Darr,et al.  Preparation of polypropylene/sepiolite nanocomposites using supercritical CO2 assisted mixing , 2007 .

[16]  Eraldo Ribeiro,et al.  Laboratory screening of coating libraries for algal adhesion , 2007, Biofouling.

[17]  Anthony S. Clare,et al.  Marine natural product antifoulants: Status and potential , 1996 .

[18]  D. Rittschof,et al.  Bryozoan and barnacle settlement in relation to initial surface wettability: a comparison of laboratory and field studies , 1989 .

[19]  Richard Wetherbee,et al.  PRIMARY ADHESION OF ENTEROMORPHA (CHLOROPHYTA, ULVALES) PROPAGULES: QUANTITATIVE SETTLEMENT STUDIES AND VIDEO MICROSCOPY 1 , 1997 .

[20]  G Swain.  REDEFINING ANTIFOULING COATINGS , 1999 .

[21]  Kiyotaka Matsumura,et al.  Nature and perception of barnacle settlement pheromones , 2000, Biofouling.

[22]  Berntsson,et al.  Analysis of behavioural rejection of micro-textured surfaces and implications for recruitment by the barnacle Balanus improvisus. , 2000, Journal of experimental marine biology and ecology.

[23]  R. Townsin.  The Ship Hull Fouling Penalty , 2003, Biofouling.

[24]  Zhan Chen,et al.  Surface restructuring behavior of various types of poly(dimethylsiloxane) in water detected by SFG. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[25]  L. Bokobza,et al.  On the use of carbon nanotubes as reinforcing fillers for elastomeric materials , 2006 .

[26]  B. Antolić,et al.  Biofouling communities on test panels coated with TBT and TBT-free copper based antifouling paints , 2006, Biofouling.

[27]  Jongsoo Kim,et al.  Adhesion study of silicone coatings: the interaction of thickness, modulus and shear rate on adhesion force , 2007, Biofouling.

[28]  M P Schultz,et al.  Three Models to Relate Detachment of Low Form Fouling at Laboratory and Ship Scale , 2003, Biofouling.

[29]  G. Beyer.  Nanocomposites: a new class of flame retardants for polymers , 2002 .

[30]  Maureen E. Callow,et al.  A turbulent channel flow apparatus for the determination of the adhesion strength of microfouling organisms , 2000 .

[31]  B. Newby,et al.  Effect of Interfacial Slippage on Viscoelastic Adhesion , 1997 .

[32]  Gregory C Rutledge,et al.  Electrospun poly(styrene-block-dimethylsiloxane) block copolymer fibers exhibiting superhydrophobicity. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[33]  G. Swain,et al.  Combinatorial materials research applied to the development of new surface coatings IV. A high-throughput bacterial biofilm retention and retraction assay for screening fouling-release performance of coatings , 2007, Biofouling.

[34]  K. Dam-Johansen,et al.  Enzyme-based antifouling coatings: a review , 2007, Biofouling.

[35]  N. O’Connor,et al.  Comparative attachment of barnacle cyprids (Balanus amphitrite Darwin, 1854; B. improvisus Darwin, 1854; & B. ebumeus Gould, 1841) to polystyrene and glass substrata , 1994 .

[36]  Maureen E. Callow,et al.  Microtopographic Cues for Settlement of Zoospores of the Green Fouling Alga Enteromorpha , 2002 .

[37]  Base plate mechanics of the barnacle Balanus amphitrite (=Amphibalanus amphitrite) , 2008, Biofouling.

[38]  P. Jonsson,et al.  Rejection of unsuitable substrata as a potential driver of aggregated settlement in the barnacle Balanus improvisus , 2004 .

[39]  Jan Genzer,et al.  Recent developments in superhydrophobic surfaces and their relevance to marine fouling: a review , 2006, Biofouling.

[40]  M. Chaudhury,et al.  Contact angle hysteresis, adhesion, and marine biofouling. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[41]  B Prieto,et al.  Rapid Quantification of Phototrophic Microorganisms and their Physiological State through their Colour , 2002 .

[42]  Maureen E. Callow,et al.  Use of Self-Assembled Monolayers of Different Wettabilities To Study Surface Selection and Primary Adhesion Processes of Green Algal (Enteromorpha) Zoospores , 2000, Applied and Environmental Microbiology.

[43]  Redefining Antifoulings.  Redefining Antifouling Coatings , 2001 .

[44]  R. Muller,et al.  Determination of crosslinking density of polymer networks by mechanical data in simple extension and by swelling degree at equilibrium , 1989 .

[45]  M. Fletcher,et al.  Adhesion of anaerobic microorganisms to solid surfaces and the effect of sequential attachment on adhesion characteristics , 2003, Biofouling.

[46]  M. Chaudhury,et al.  The influence of elastic modulus and thickness on the release of the soft-fouling green alga Ulva linza (syn. Enteromorpha linza ) from poly(dimethylsiloxane) (PDMS) model networks , 2005, Biofouling.

[47]  I. L. Singer,et al.  Factors that influence elastomeric coating performance: the effect of coating thickness on basal plate morphology, growth and critical removal stress of the barnacle Balanus amphitrite , 2006, Biofouling.

[48]  Nick Aldred,et al.  Species-specific engineered antifouling topographies: correlations between the settlement of algal zoospores and barnacle cyprids , 2007, Biofouling.

[49]  Nobuhiro Fusetani,et al.  Biofouling and antifouling. , 2004, Natural product reports.

[50]  C. Hellio,et al.  Seasonal Variation of Antifouling Activities of Marine Algae from the Brittany Coast (France) , 2003, Marine Biotechnology.

[51]  Chunxiong Luo,et al.  Artificial lotus leaf by nanocasting. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[52]  Adam W Feinberg,et al.  Engineered antifouling microtopographies – correlating wettability with cell attachment , 2006, Biofouling.

[53]  Jin Zhai,et al.  Super-Hydrophobic PDMS Surface with Ultra-Low Adhesive Force† , 2005 .

[54]  Maureen E. Callow,et al.  The Ulva Spore Adhesive System , 2006 .

[55]  V. Roussis,et al.  Inhibitory Effects of Mediterranean Sponge Extracts and Metabolites on Larval Settlement of the Barnacle Balanus amphitrite , 2005, Marine Biotechnology.

[56]  J. Callow,et al.  Effect of background colour on growth and adhesion strength of Ulva sporelings , 2008, Biofouling (Print).

[57]  Adam W Feinberg,et al.  Engineered antifouling microtopographies – effect of feature size, geometry, and roughness on settlement of zoospores of the green alga Ulva , 2007, Biofouling.

[58]  J. Callow,et al.  Combinatorial materials research applied to the development of new surface coatings V. Application of a spinning water-jet for the semi-high throughput assessment of the attachment strength of marine fouling algae , 2007, Biofouling.

[59]  P. Dubois,et al.  Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials , 2000 .

[60]  Emmanuel P. Giannelis,et al.  NEW ADVANCES IN POLYMER/LAYERED SILICATE NANOCOMPOSITES , 2002 .

[61]  E. Bourget,et al.  Substratum heterogeneity and complexity influence micro-habitat selection of Balanus sp. and Tubularia crocea larvae , 1996 .

[62]  S. Iijima.  Helical microtubules of graphitic carbon , 1991, Nature.

[63]  A. Goyal,et al.  Inorganic nanocomposites for the next generation photovoltaics , 2006 .

[64]  M. Yeh,et al.  Enhancement of the mechanical properties of carbon nanotube/phenolic composites using a carbon nanotube network as the reinforcement , 2004 .

[65]  Abraham Marmur,et al.  Super-hydrophobicity fundamentals: implications to biofouling prevention , 2006, Biofouling.

[66]  P. Degée,et al.  CH‐π Interactions as the Driving Force for Silicone‐Based Nanocomposites with Exceptional Properties , 2008 .

[67]  H. Elwing,et al.  Surface wettability as a determinant in the settlement of the barnacle Balanus Improvisus (DARWIN) , 2004 .

[68]  Liliane Bokobza,et al.  Elastomeric composites. I. Silicone composites , 2004 .

[69]  J. Callow,et al.  An in situ study of the nanomechanical properties of barnacle (Balanus amphitrite) cyprid cement using atomic force microscopy (AFM) , 2006, Biofouling.

[70]  I. L. Singer,et al.  Mechanical factors favoring release from fouling release coatings , 2000, Biofouling.

[71]  C. Wilkinson,et al.  Substratum nanotopography and the adhesion of biological cells. Are symmetry or regularity of nanotopography important? , 2001, Biophysical chemistry.

[72]  M. Schultz.  Effects of coating roughness and biofouling on ship resistance and powering , 2007, Biofouling.

[73]  I. L. Singer,et al.  Mechanical aspects of silicone coatings for hard foulant control , 2000 .