Superhydrophobic coatings are increasingly being evaluated as anticorrosion interventions in exceedingly hydrated environments.However,concerns about their long-term durability and amenability to large-area applicatio...Superhydrophobic coatings are increasingly being evaluated as anticorrosion interventions in exceedingly hydrated environments.However,concerns about their long-term durability and amenability to large-area applications in marine environments are still hindering commercial-scale deployment.This study is focused on development of easy-to-apply superhydrophobic coatings,with multifunctional capabilities,in order to extend the integrity and durability of the coatings in harsh marine environments.Here,a set of facile methods involving selective chemical etching using concentrated Na OH,as well as fluorination with perfluoropolyether methyl ester were adopted to fabricate a superhydrophobic surface on basalt scales,having the required rough hierarchical micro-nanotextured and low surface energy.The superhydrophobic basalt scales were subsequently aligned atop a fluorocarbon resin,pre-deposited on a metal substrate,to yield a multifunctional superhydrophobic coating(3μL water droplet;contact angle=165.1°,rolling angle=0.7°),easily amenable to large surface area application and having excellent wear resistance,UV-aging resistance,salt spray resistance,corrosion resistance and antibacterial capabilities.展开更多
In this study,basalt scales were activated by air plasma and were subsequently deposited with cerium dioxide nanoparticles to obtain CeO_(2)-modified basalts(CB).Inspired by mussel biomimetics,polydopamine(PDA)and 3-g...In this study,basalt scales were activated by air plasma and were subsequently deposited with cerium dioxide nanoparticles to obtain CeO_(2)-modified basalts(CB).Inspired by mussel biomimetics,polydopamine(PDA)and 3-glycidoxypropyltrimethoxysilane were further employed to modify the properties of CB to obtain functionalized basalt scales(CBD).This treatment greatly increased the interfacial compatibility between inorganic fillers and epoxy resin.At the same time,PDA can form chelates with iron ions in the anodic area to prevent further corrosion.Tensile,water absorption,and electrochemical impedance spectrum measurements showed that incorporating CBD into epoxy resins resulted in the composite coatings with higher mechanical properties,water penetration resistance,corrosion resistance,and lower wetting properties.展开更多
基金the financial supports of the National Natural Science Foundation of China under the contract No.51871049the Fundamental Research Funds for the Central Universities under the contract No.2017YFB0702303+1 种基金Liao Ning Revitalization Talents Program under the contract No.XLYC1807076the World Bank funded Africa Centers of Excellence for Development Impact(ACE Impact)Project。
文摘Superhydrophobic coatings are increasingly being evaluated as anticorrosion interventions in exceedingly hydrated environments.However,concerns about their long-term durability and amenability to large-area applications in marine environments are still hindering commercial-scale deployment.This study is focused on development of easy-to-apply superhydrophobic coatings,with multifunctional capabilities,in order to extend the integrity and durability of the coatings in harsh marine environments.Here,a set of facile methods involving selective chemical etching using concentrated Na OH,as well as fluorination with perfluoropolyether methyl ester were adopted to fabricate a superhydrophobic surface on basalt scales,having the required rough hierarchical micro-nanotextured and low surface energy.The superhydrophobic basalt scales were subsequently aligned atop a fluorocarbon resin,pre-deposited on a metal substrate,to yield a multifunctional superhydrophobic coating(3μL water droplet;contact angle=165.1°,rolling angle=0.7°),easily amenable to large surface area application and having excellent wear resistance,UV-aging resistance,salt spray resistance,corrosion resistance and antibacterial capabilities.
基金financial support from the National Natural Science Foundation of China(Nos.52171093,51771061,and U20A20233)the National Key R&D Program of China(No.2019YFE0111000).
文摘In this study,basalt scales were activated by air plasma and were subsequently deposited with cerium dioxide nanoparticles to obtain CeO_(2)-modified basalts(CB).Inspired by mussel biomimetics,polydopamine(PDA)and 3-glycidoxypropyltrimethoxysilane were further employed to modify the properties of CB to obtain functionalized basalt scales(CBD).This treatment greatly increased the interfacial compatibility between inorganic fillers and epoxy resin.At the same time,PDA can form chelates with iron ions in the anodic area to prevent further corrosion.Tensile,water absorption,and electrochemical impedance spectrum measurements showed that incorporating CBD into epoxy resins resulted in the composite coatings with higher mechanical properties,water penetration resistance,corrosion resistance,and lower wetting properties.
