Surface icing and fouling pose a substantial threat to marine facilities.Herein,anti-icing coating composites(F/S-WC-n%/F)with high photo-thermal conversion efficiencies were prepared by spraying a small amount of sup...Surface icing and fouling pose a substantial threat to marine facilities.Herein,anti-icing coating composites(F/S-WC-n%/F)with high photo-thermal conversion efficiencies were prepared by spraying a small amount of super-hydrophobic tungsten carbide on fluoro-olefin vinyl ether copolymer(FEVE)at a specific pressure.The photo-thermal properties of the coatings provide them with ice melting and sterilization effects.The delayed icing time of F/S-WC-5%/F is 571 s,with the ice-covered-surface temperature increasing to 42°C after exposure to simulated sunlight.Heat transfer modelling calculations show that icing needs to overcome high Gibbs free energy on F/S-WC-5%/F.Quantum chemistry fundamentally reveals a weak thermodynamic effect of water nucleation on F/S-WC-5%/F,indicating that the icing process requires a high degree of sub-cooling,resulting in delayed icing.In addition,F/S-WC-5%/F can resist different types of fouling and exhibit sterilization activity.Using F/S-WC-5%/F,Escherichia coli germs are killed via heat-induced morphological rupture under a solar simulator.Owing to its excellent environmental versatility,sustainability,mechanical durability and material adaptability,F/S-WC-5%/F is a promising anti-icing and anti-fouling candidate for various practical applications,even in harsh environments.展开更多
The limited dispersibility and lack of active anti-corrosion properties of graphene oxide(GO)have hindered its application in corrosion resistance.In this study,we graft the corrosion inhibitor benzotriazole(BTA)on th...The limited dispersibility and lack of active anti-corrosion properties of graphene oxide(GO)have hindered its application in corrosion resistance.In this study,we graft the corrosion inhibitor benzotriazole(BTA)on the surface of GO to achieve pH response release,providing active corrosion protection for epoxy modified polyurethane(EP-PU)coating.An environmentally friendly composite material with a sandwich-like structure was synthesized by in-situ polymerization of pyrrole to improve GO dispersion and prevent rapid release of BTA.The electrochemical impedance spectroscopy(EIS)shows that adding 0.15%GBP enhances the coating’s anti-corrosion performance.The dual functions of passive and active corrosion enable the GBP/EP-PU coating to provide long-term corrosion protection for metal substrates.展开更多
基金supported by the Heilongjiang Province Key Research and Development Program(No.2023ZX07D04)the Fundamental Research Funds for Central Universities and the State Key Laboratory of Marine Coating.
文摘Surface icing and fouling pose a substantial threat to marine facilities.Herein,anti-icing coating composites(F/S-WC-n%/F)with high photo-thermal conversion efficiencies were prepared by spraying a small amount of super-hydrophobic tungsten carbide on fluoro-olefin vinyl ether copolymer(FEVE)at a specific pressure.The photo-thermal properties of the coatings provide them with ice melting and sterilization effects.The delayed icing time of F/S-WC-5%/F is 571 s,with the ice-covered-surface temperature increasing to 42°C after exposure to simulated sunlight.Heat transfer modelling calculations show that icing needs to overcome high Gibbs free energy on F/S-WC-5%/F.Quantum chemistry fundamentally reveals a weak thermodynamic effect of water nucleation on F/S-WC-5%/F,indicating that the icing process requires a high degree of sub-cooling,resulting in delayed icing.In addition,F/S-WC-5%/F can resist different types of fouling and exhibit sterilization activity.Using F/S-WC-5%/F,Escherichia coli germs are killed via heat-induced morphological rupture under a solar simulator.Owing to its excellent environmental versatility,sustainability,mechanical durability and material adaptability,F/S-WC-5%/F is a promising anti-icing and anti-fouling candidate for various practical applications,even in harsh environments.
基金supported by the National Natural Science Foundation of China(NSFC 22106033)Fundamental Research Funds of the Central University,and Heilongjiang Touyan Innovation Team Program.
文摘The limited dispersibility and lack of active anti-corrosion properties of graphene oxide(GO)have hindered its application in corrosion resistance.In this study,we graft the corrosion inhibitor benzotriazole(BTA)on the surface of GO to achieve pH response release,providing active corrosion protection for epoxy modified polyurethane(EP-PU)coating.An environmentally friendly composite material with a sandwich-like structure was synthesized by in-situ polymerization of pyrrole to improve GO dispersion and prevent rapid release of BTA.The electrochemical impedance spectroscopy(EIS)shows that adding 0.15%GBP enhances the coating’s anti-corrosion performance.The dual functions of passive and active corrosion enable the GBP/EP-PU coating to provide long-term corrosion protection for metal substrates.
