The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Maureen E. Callow - One of the best experts on this subject based on the ideXlab platform.
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Coatings based on side-chain ether-linked poly(ethylene glycol) and fluorocarbon polymers for the control of Marine Biofouling
Biofouling, 2003Co-Authors: Jeffrey P Youngblood, Luisa Andruzzi, James A. Callow, Alexander Hexemer, John A. Finlay, Edward J Kramer, Christopher K Ober, Maureen E. CallowAbstract:The preparation of side group modified polystyrene-based surface-active block copolymers (SABC) for use as Marine fouling resistance/release applications is described. Modifying moieties such as poly(ethylene glycol) (PEG) and semifluorinated segments were used. A novel bilayer methodology has been employed that provides both suitable mechanical properties through the use of an elastomeric primer layer of styrene-ethylene/butylene-styrene (SEBS) and control of surface-chemistry through use of the SABCs. This approach has potential as a cost-effective technology for environmentally benign coatings that resist and release Marine Biofouling. Initial testing of these materials included determination of captive bubble contact angles and protein adsorption. Testing against Marine fouling organisms was performed using settlement and adhesion bioassays with zoospores of the green alga Enteromorpha. The results showed that all surfaces had markedly reduced levels of zoospore settlement compared with glass controls and that adhesion strength was strongly affected by the semifluorinated SABC. The results are discussed in terms of surface properties.
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coatings based on side chain ether linked poly ethylene glycol and fluorocarbon polymers for the control of Marine Biofouling
Biofouling, 2003Co-Authors: Jeffrey P Youngblood, Luisa Andruzzi, James A. Callow, Alexander Hexemer, John A. Finlay, Edward J Kramer, Christopher K Ober, Maureen E. CallowAbstract:The preparation of side group modified polystyrene-based surface-active block copolymers (SABC) for use as Marine fouling resistance/release applications is described. Modifying moieties such as poly(ethylene glycol) (PEG) and semifluorinated segments were used. A novel bilayer methodology has been employed that provides both suitable mechanical properties through the use of an elastomeric primer layer of styrene-ethylene/butylene-styrene (SEBS) and control of surface-chemistry through use of the SABCs. This approach has potential as a cost-effective technology for environmentally benign coatings that resist and release Marine Biofouling. Initial testing of these materials included determination of captive bubble contact angles and protein adsorption. Testing against Marine fouling organisms was performed using settlement and adhesion bioassays with zoospores of the green alga Enteromorpha . The results showed that all surfaces had markedly reduced levels of zoospore settlement compared with glass control...
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Marine Biofouling a sticky problem
Biologist (London England), 2002Co-Authors: Maureen E. Callow, J E CallowAbstract:Organisms that colonise underwater surfaces, such as barnacle larvae and spores of algae, use a diverse array of biological 'glues' to provide both temporary and more permanent adhesion. The practical consequence of colonisation by these organisms is Biofouling - something that has plagued Mariners for years - causing increased drag and, in extreme cases, corrosion. Might there be a biological solution to this biological problem?
Wen Jing Yang - One of the best experts on this subject based on the ideXlab platform.
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polymer brush coatings for combating Marine Biofouling
Progress in Polymer Science, 2014Co-Authors: Wen Jing Yang, K G Neoh, E T Kang, Serena Layming Teo, Dan RittschofAbstract:Abstract A variety of functional polymer brushes and coatings have been developed for combating Marine Biofouling and biocorrosion with much less environmental impact than traditional biocides. This review summarizes recent developments in Marine antifouling polymer brushes and coatings that are tethered to material surfaces and do not actively release biocides. Polymer brush coatings have been designed to inhibit molecular fouling, microfouling and macrofouling through incorporation or inclusion of multiple functionalities. Hydrophilic polymers, such as poly(ethylene glycol), hydrogels, zwitterionic polymers and polysaccharides, resist attachment of Marine organisms effectively due to extensive hydration. Fouling release polymer coatings, based on fluoropolymers and poly(dimethylsiloxane) elastomers, minimize adhesion between Marine organisms and material surfaces, leading to easy removal of biofoulants. Polycationic coatings are effective in reducing Marine Biofouling partly because of their good bactericidal properties. Recent advances in controlled radical polymerization and click chemistry have also allowed better molecular design and engineering of multifunctional brush coatings for improved antifouling efficacies.
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Functional polymer brushes via surface-initiated atom transfer radical graft polymerization for combating Marine Biofouling.
Biofouling, 2012Co-Authors: Wen Jing Yang, Serena Layming Teo, Koon Gee Neoh, En-tang Kang, Serina Siew Chen Lee, Dan RittschofAbstract:Dense and uniform polymer brush coatings were developed to combat Marine Biofouling. Nonionic hydrophilic, nonionic hydrophobic, cationic, anionic and zwitterionic polymer brush coatings were synthesized via surface-initiated atom transfer radical polymerization (SI-ATRP) of 2-hydroxyethyl methacrylate, 2,3,4,5,6-pentafluorostyrene, 2-(methacryloyloxy)ethyl trimethylammonium chloride, 4-styrenesulfonic acid sodium and N,N'-dimethyl-(methylmethacryloyl ethyl) ammonium propanesulfonate, respectively. The functionalized surfaces had different efficacies in preventing adsorption of bovine serum albumin (BSA), adhesion of the Gram-negative bacterium Pseudomonas sp. NCIMB 2021 and the Gram-positive Staphylococcus aureus, and settlement of cyprids of the barnacle Amphibalanus amphitrite (=Balanus amphitrite). The nonionic hydrophilic, anionic and zwitterionic polymer brushes resisted BSA adsorption during a 2 h exposure period. The nonionic hydrophilic, cationic and zwitterionic brushes exhibited resistance to bacterial fouling (24 h exposure) and cyprid settlement (24 and 48 h incubation). The hydrophobic brushes moderately reduced protein adsorption, and bacteria and cyprid settlement. The anionic brushes were least effective in preventing attachment of bacteria and barnacle cyprids. Thus, the best approach to combat Biofouling involves a combination of nonionic hydrophilic and zwitterionic polymer brush coatings on material surfaces.
Dan Rittschof - One of the best experts on this subject based on the ideXlab platform.
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polymer brush coatings for combating Marine Biofouling
Progress in Polymer Science, 2014Co-Authors: Wen Jing Yang, K G Neoh, E T Kang, Serena Layming Teo, Dan RittschofAbstract:Abstract A variety of functional polymer brushes and coatings have been developed for combating Marine Biofouling and biocorrosion with much less environmental impact than traditional biocides. This review summarizes recent developments in Marine antifouling polymer brushes and coatings that are tethered to material surfaces and do not actively release biocides. Polymer brush coatings have been designed to inhibit molecular fouling, microfouling and macrofouling through incorporation or inclusion of multiple functionalities. Hydrophilic polymers, such as poly(ethylene glycol), hydrogels, zwitterionic polymers and polysaccharides, resist attachment of Marine organisms effectively due to extensive hydration. Fouling release polymer coatings, based on fluoropolymers and poly(dimethylsiloxane) elastomers, minimize adhesion between Marine organisms and material surfaces, leading to easy removal of biofoulants. Polycationic coatings are effective in reducing Marine Biofouling partly because of their good bactericidal properties. Recent advances in controlled radical polymerization and click chemistry have also allowed better molecular design and engineering of multifunctional brush coatings for improved antifouling efficacies.
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Functional polymer brushes via surface-initiated atom transfer radical graft polymerization for combating Marine Biofouling.
Biofouling, 2012Co-Authors: Wen Jing Yang, Serena Layming Teo, Koon Gee Neoh, En-tang Kang, Serina Siew Chen Lee, Dan RittschofAbstract:Dense and uniform polymer brush coatings were developed to combat Marine Biofouling. Nonionic hydrophilic, nonionic hydrophobic, cationic, anionic and zwitterionic polymer brush coatings were synthesized via surface-initiated atom transfer radical polymerization (SI-ATRP) of 2-hydroxyethyl methacrylate, 2,3,4,5,6-pentafluorostyrene, 2-(methacryloyloxy)ethyl trimethylammonium chloride, 4-styrenesulfonic acid sodium and N,N'-dimethyl-(methylmethacryloyl ethyl) ammonium propanesulfonate, respectively. The functionalized surfaces had different efficacies in preventing adsorption of bovine serum albumin (BSA), adhesion of the Gram-negative bacterium Pseudomonas sp. NCIMB 2021 and the Gram-positive Staphylococcus aureus, and settlement of cyprids of the barnacle Amphibalanus amphitrite (=Balanus amphitrite). The nonionic hydrophilic, anionic and zwitterionic polymer brushes resisted BSA adsorption during a 2 h exposure period. The nonionic hydrophilic, cationic and zwitterionic brushes exhibited resistance to bacterial fouling (24 h exposure) and cyprid settlement (24 and 48 h incubation). The hydrophobic brushes moderately reduced protein adsorption, and bacteria and cyprid settlement. The anionic brushes were least effective in preventing attachment of bacteria and barnacle cyprids. Thus, the best approach to combat Biofouling involves a combination of nonionic hydrophilic and zwitterionic polymer brush coatings on material surfaces.
Joydeep Dutta - One of the best experts on this subject based on the ideXlab platform.
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chitosan zinc oxide nanocomposite coatings for the prevention of Marine Biofouling
Chemosphere, 2017Co-Authors: Joydeep Dutta, Laila Alnaamani, Sergey Dobretsov, Grant J BurgessAbstract:Marine Biofouling is a worldwide problem affecting maritime industries. Global concerns about the high toxicity of antifouling paints have highlighted the need to develop less toxic antifouling coa ...
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Chitosan-zinc oxide nanocomposite coatings for the prevention of Marine Biofouling
Chemosphere, 2017Co-Authors: Laila Al-naamani, Joydeep Dutta, Sergey Dobretsov, J. Grant BurgessAbstract:Marine Biofouling is a worldwide problem affecting maritime industries. Global concerns about the high toxicity of antifouling paints have highlighted the need to develop less toxic antifouling coatings. Chitosan is a natural polymer with antimicrobial, antifungal and antialgal properties that is obtained from partial deacetylation of crustacean waste. In the present study, nanocomposite chitosan-zinc oxide (chitosan-ZnO) nanoparticle hybrid coatings were developed and their antifouling activity was tested. Chitosan-ZnO nanoparticle coatings showed anti-diatom activity against Navicula sp. and antibacterial activity against the Marine bacterium Pseudoalteromonas nigrifaciens. Additional antifouling properties of the coatings were investigated in a mesocosm study using tanks containing natural sea water under controlled laboratory conditions. Each week for four weeks, biofilm was removed and analysed by flow cytometry to estimate total bacterial densities on the coated substrates. Chitosan-ZnO hybrid coatings led to better inhibition of bacterial growth in comparison to chitosan coatings alone, as determined by flow cytometry. This study demonstrates the antifouling potential of chitosan-ZnO nanocomposite hybrid coatings, which can be used for the prevention of Biofouling.
Jeffrey P Youngblood - One of the best experts on this subject based on the ideXlab platform.
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Coatings based on side-chain ether-linked poly(ethylene glycol) and fluorocarbon polymers for the control of Marine Biofouling
Biofouling, 2003Co-Authors: Jeffrey P Youngblood, Luisa Andruzzi, James A. Callow, Alexander Hexemer, John A. Finlay, Edward J Kramer, Christopher K Ober, Maureen E. CallowAbstract:The preparation of side group modified polystyrene-based surface-active block copolymers (SABC) for use as Marine fouling resistance/release applications is described. Modifying moieties such as poly(ethylene glycol) (PEG) and semifluorinated segments were used. A novel bilayer methodology has been employed that provides both suitable mechanical properties through the use of an elastomeric primer layer of styrene-ethylene/butylene-styrene (SEBS) and control of surface-chemistry through use of the SABCs. This approach has potential as a cost-effective technology for environmentally benign coatings that resist and release Marine Biofouling. Initial testing of these materials included determination of captive bubble contact angles and protein adsorption. Testing against Marine fouling organisms was performed using settlement and adhesion bioassays with zoospores of the green alga Enteromorpha. The results showed that all surfaces had markedly reduced levels of zoospore settlement compared with glass controls and that adhesion strength was strongly affected by the semifluorinated SABC. The results are discussed in terms of surface properties.
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coatings based on side chain ether linked poly ethylene glycol and fluorocarbon polymers for the control of Marine Biofouling
Biofouling, 2003Co-Authors: Jeffrey P Youngblood, Luisa Andruzzi, James A. Callow, Alexander Hexemer, John A. Finlay, Edward J Kramer, Christopher K Ober, Maureen E. CallowAbstract:The preparation of side group modified polystyrene-based surface-active block copolymers (SABC) for use as Marine fouling resistance/release applications is described. Modifying moieties such as poly(ethylene glycol) (PEG) and semifluorinated segments were used. A novel bilayer methodology has been employed that provides both suitable mechanical properties through the use of an elastomeric primer layer of styrene-ethylene/butylene-styrene (SEBS) and control of surface-chemistry through use of the SABCs. This approach has potential as a cost-effective technology for environmentally benign coatings that resist and release Marine Biofouling. Initial testing of these materials included determination of captive bubble contact angles and protein adsorption. Testing against Marine fouling organisms was performed using settlement and adhesion bioassays with zoospores of the green alga Enteromorpha . The results showed that all surfaces had markedly reduced levels of zoospore settlement compared with glass control...