Metals are indispensable engineered materials for day-to-day life.Researches focused on metallic surfaces with superlyophobicity(superhydrophobicity,superoleophobicity,underwater superoleophobicity and slippery charac...Metals are indispensable engineered materials for day-to-day life.Researches focused on metallic surfaces with superlyophobicity(superhydrophobicity,superoleophobicity,underwater superoleophobicity and slippery characteristic)have attracted much attention recently.Nature is a magician that gives each organic life a unique advantage.Researchers have created a large number of biomimetic superlyophobic metallic surfaces through various approaches.These biomimetic superlyophobic metallic surfaces exhibit advantages in many applications,such as self-cleaning,corrosion resistance,anti-icing,and drag reduction.In this review,the specific fabrication and applications of biomimetic superlyophobic metallic surfaces were reported.The remaining challenges and future outlook of biomimetic superlyophobic metallic surfaces were preliminarily analyzed.It is hoped that the review will be essential for broadening the scope of potential applications of metals and providing a powerful reference for future research on metal-based advanced functional materials.展开更多
Currently,most of the materials for oil-water separation membranes are limited to fluorine-based polymers with low surface energy.However,it is not biodegradable and requires large amounts of organic and toxic solvent...Currently,most of the materials for oil-water separation membranes are limited to fluorine-based polymers with low surface energy.However,it is not biodegradable and requires large amounts of organic and toxic solvents in the membrane manufacturing process.Therefore,interest in the development of a new eco-friendly oil-water separation membrane that does not cause secondary pollution and exhibits selective wettability characteristics in water or oil is increasing.The biopolymeric nanofibrous membranes inspired by fish skin can provide specific underwater oleophobicity,which is effective for excellent oil-water separation efficiency and prevention of secondary contamination.Fish gelatin,which is highly soluble in water and has a low gelation temperature,can be electrospun in an aqueous solution and has the same polar functional groups as the hydrophilic mucilage of fish skin.In addition,the micro/nanostructure of fish skin,which induces superoleophobicity in water,introduces a bead-on-string structure using the Rayleigh instability of electrospinning.The solubility of fish gelatin in water was removed using an eco-friendly crosslinking method using reducing sugars.Fish skin-mimicking materials successfully separated suspended oil and emulsified oil,with a maximum flux of 2086 Lm^(−2) h^(−1) and a separation efficiency of more than 99%.The proposed biopolymeric nanofibrous membranes use fish gelatin,which can be extracted from fish waste and has excellent biodegradability with excellent oil-water separation performance.In addition,polymer material processing,including membrane manufacturing and crosslinking,can be realized through eco-friendly processes.Therefore,fish skin-inspired biopolymeric membrane is expected to be a promising candidate for a sustainable and effective oil-water separation membrane in the future.展开更多
With the possibility of large-area processing, the ZIF-8-coated mesh membranes with rough micro-/nanostructures and underwater superoleophobic properties were successfully fabricated at ambient temperature and pressur...With the possibility of large-area processing, the ZIF-8-coated mesh membranes with rough micro-/nanostructures and underwater superoleophobic properties were successfully fabricated at ambient temperature and pressure.These membranes exhibited excellent separation efficiency over 99.99% for various oil-water mixtures with the residual oil content in the collected water less than 4 ppm, and high water flux of 10.2×104 L m-2 h-1. Furthermore, the ZIF-8-coated mesh membrane displayed outstanding stability towards high temperature and various organic solvents immersion. More importantly, based on its facile fabrication method, this kind of ZIF-8-coated mesh membrane can be easily enlarged, which is critical for the practical oil-water separation applications.展开更多
A multi-functional porous paper-based material was prepared from grass pulp by simple pore-forming and green cross-linking method.As a pore-forming agent,calcium citrate increased the porosity of the paper-based mater...A multi-functional porous paper-based material was prepared from grass pulp by simple pore-forming and green cross-linking method.As a pore-forming agent,calcium citrate increased the porosity of the paper-based material from 30%to 69%while retaining the mechanical strength.The covalent cross-linking of citric acid between cellulose fibers improved both the wet strength and adsorption capacity.In addition,owing to the introduction of high-content carboxyl groups as well as the construction of hierarchical micro-nano structure,the underwater oil contact angle was up to 165°.The separation efficiency of the emulsified oil was 99.3%,and the water flux was up to 2020 L·m^(–2)·h^(–1).The theoretical maximum adsorption capacities of cadmium ion,lead ion and methylene blue reached 136,229 and 128.9 mg·g^(–1),respectively.The continuous purification of complex wastewater can be achieved by using paper-based materials combined with filtration technology.This work provides a simple,low cost and environmental approach for the treatment of complex wastewater containing insoluble oil,organic dyes,and heavy metal ions.展开更多
Development of porous materials with anti-fouling and remote controllability is highly desired for oil-water separation application yet still challenging. Herein, to address this challenge, a sponge with unusual super...Development of porous materials with anti-fouling and remote controllability is highly desired for oil-water separation application yet still challenging. Herein, to address this challenge, a sponge with unusual superhydrophilicity/superoleophobicity and magnetic property was fabricated through a dip-coating process. To exploit its superhydrophilic/superoleophobic property, the obtained sponge was used as a reusable water sorbent scaffold to collect water from bulk oils without absorbing any oil. Owing to its magnetic property, the sponge was manipulated remotely by a magnet without touching it directly during the whole water collection process, which could potentially lower the cost of the water collection process. Apart from acting as a water-absorbing material, the sponge can also be used as affiliation material to separate water from oil-water mixture and oil in water emulsion selectively, when fixed into a cone funnel. This research provides a key addition to the field of oil-water separation materials.展开更多
Polypropylene(PP)membrane has been widely used in water purification and other fields owing to special pore structure,excellent mechanical properties and resistance to acids,alkalis and organic solvents.However,it is ...Polypropylene(PP)membrane has been widely used in water purification and other fields owing to special pore structure,excellent mechanical properties and resistance to acids,alkalis and organic solvents.However,it is difficult for PP to introduce the hydrophilic chemical compositions for oil-water separation.Herein,superhydrophilic and underwater superoleophobic PP membranes were prepared by ALD for efficient gravity-driven oil-water separation.Owing to synergistic effect,oil contact angle of TiO_(2) coated PP membrane under water can reach above 150°.Hence,TiO_(2) coated PP membrane has great oil-repelling performance.Because of the superwetting property,TiO_(2) coated PP membrane can easily separate oil-water mixture and have high separation efficiency(more than 95%).The outstanding recyclability and mechanical stability of TiO_(2) coated PP membrane suggest the promising potential application in practical oil-water separation.展开更多
The fundamental relationship between microstructure,constituent,processing and performances of separating materials is really a vital issue.Traditional preparation methods for separation membranes are complex,time-con...The fundamental relationship between microstructure,constituent,processing and performances of separating materials is really a vital issue.Traditional preparation methods for separation membranes are complex,time-consuming and easy to be fouled.Also,the durability of conventional coatings on membrane is poor.By combination of bioinspiration from mussel adhesive and fish scales’underwater superoleophobicity,we propose a general route to prepare organic-inorganic hybrid coatings,while no complex apparatus is needed.Specifically,based on the biomimetic adhesion of polydopamine(PDA),we used it as a binder to adhere TiO_(2)nanoparticles and built rough microstructure on fabric.In this way,we obtained TiO_(2)-PDA treated fabric with special wettability.These TiO_(2)-PDA treated samples owned superamphiphilicity in air,underwater superoleophobicity(underwater oil contact angles(OCAs)>150°),underoil superhydrophobicity(underoil water contact angles(WCAs)>150°),excellent multiresistance;and can separate polar/nonpolar liquid mixture effectively.It also owned superaerophobicity underwater(underwater bubble contact angles(BCAs)>150°).The proposed TiO_(2)-PDA coatings are highly expected to be employed for real situation of water pollution remediation,self-cleaning,oil extraction and harsh chemical engineering issues.展开更多
基金the China-EU H2020 International Science and Technology Cooperation Program(FabSurfWAR Nos.2016YFE0112100 and 644971)National Key Research and Development Plan Project(No.2018YFB1107403)+1 种基金Jilin Province Scientific and Technological Development Program(No.Z20190101005JH)the"111"Project of China(No.D17017)。
文摘Metals are indispensable engineered materials for day-to-day life.Researches focused on metallic surfaces with superlyophobicity(superhydrophobicity,superoleophobicity,underwater superoleophobicity and slippery characteristic)have attracted much attention recently.Nature is a magician that gives each organic life a unique advantage.Researchers have created a large number of biomimetic superlyophobic metallic surfaces through various approaches.These biomimetic superlyophobic metallic surfaces exhibit advantages in many applications,such as self-cleaning,corrosion resistance,anti-icing,and drag reduction.In this review,the specific fabrication and applications of biomimetic superlyophobic metallic surfaces were reported.The remaining challenges and future outlook of biomimetic superlyophobic metallic surfaces were preliminarily analyzed.It is hoped that the review will be essential for broadening the scope of potential applications of metals and providing a powerful reference for future research on metal-based advanced functional materials.
基金supported by the Technology Innovation Program(20018540)funded by the Ministry of Trade,Industry and Energy(MOTIE,Korea)+1 种基金supported by the Basic Science Research Program of the National Research Foundation of Korea(NRF)funded by the Ministry of Education(NRF-2021R1A4A2001403).
文摘Currently,most of the materials for oil-water separation membranes are limited to fluorine-based polymers with low surface energy.However,it is not biodegradable and requires large amounts of organic and toxic solvents in the membrane manufacturing process.Therefore,interest in the development of a new eco-friendly oil-water separation membrane that does not cause secondary pollution and exhibits selective wettability characteristics in water or oil is increasing.The biopolymeric nanofibrous membranes inspired by fish skin can provide specific underwater oleophobicity,which is effective for excellent oil-water separation efficiency and prevention of secondary contamination.Fish gelatin,which is highly soluble in water and has a low gelation temperature,can be electrospun in an aqueous solution and has the same polar functional groups as the hydrophilic mucilage of fish skin.In addition,the micro/nanostructure of fish skin,which induces superoleophobicity in water,introduces a bead-on-string structure using the Rayleigh instability of electrospinning.The solubility of fish gelatin in water was removed using an eco-friendly crosslinking method using reducing sugars.Fish skin-mimicking materials successfully separated suspended oil and emulsified oil,with a maximum flux of 2086 Lm^(−2) h^(−1) and a separation efficiency of more than 99%.The proposed biopolymeric nanofibrous membranes use fish gelatin,which can be extracted from fish waste and has excellent biodegradability with excellent oil-water separation performance.In addition,polymer material processing,including membrane manufacturing and crosslinking,can be realized through eco-friendly processes.Therefore,fish skin-inspired biopolymeric membrane is expected to be a promising candidate for a sustainable and effective oil-water separation membrane in the future.
基金financially supported by the National Natural Science Foundation of China (21571076, 21390394, 21571079 and 61701543)"111" project (B07016)+1 种基金the Ministry of Science and Technology of SINOPEC (A381)Open Projects of State Key Laboratory of Safety and Control for Chemicals (SKL-038)
文摘With the possibility of large-area processing, the ZIF-8-coated mesh membranes with rough micro-/nanostructures and underwater superoleophobic properties were successfully fabricated at ambient temperature and pressure.These membranes exhibited excellent separation efficiency over 99.99% for various oil-water mixtures with the residual oil content in the collected water less than 4 ppm, and high water flux of 10.2×104 L m-2 h-1. Furthermore, the ZIF-8-coated mesh membrane displayed outstanding stability towards high temperature and various organic solvents immersion. More importantly, based on its facile fabrication method, this kind of ZIF-8-coated mesh membrane can be easily enlarged, which is critical for the practical oil-water separation applications.
基金The support of this work by the National Key Research and Development Program of China(Grant No.2019YFC19059003)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)is gratefully acknowledged.
文摘A multi-functional porous paper-based material was prepared from grass pulp by simple pore-forming and green cross-linking method.As a pore-forming agent,calcium citrate increased the porosity of the paper-based material from 30%to 69%while retaining the mechanical strength.The covalent cross-linking of citric acid between cellulose fibers improved both the wet strength and adsorption capacity.In addition,owing to the introduction of high-content carboxyl groups as well as the construction of hierarchical micro-nano structure,the underwater oil contact angle was up to 165°.The separation efficiency of the emulsified oil was 99.3%,and the water flux was up to 2020 L·m^(–2)·h^(–1).The theoretical maximum adsorption capacities of cadmium ion,lead ion and methylene blue reached 136,229 and 128.9 mg·g^(–1),respectively.The continuous purification of complex wastewater can be achieved by using paper-based materials combined with filtration technology.This work provides a simple,low cost and environmental approach for the treatment of complex wastewater containing insoluble oil,organic dyes,and heavy metal ions.
基金This work was supported by the National Natural Science Foundation of China(Grant No.11704321)the Natural Science Foundation of Shandong Province(ZR2016JL020 and ZR2019MEM044)the Yantai Science and Technology Plan Projects(2019XDHZ087).
文摘Development of porous materials with anti-fouling and remote controllability is highly desired for oil-water separation application yet still challenging. Herein, to address this challenge, a sponge with unusual superhydrophilicity/superoleophobicity and magnetic property was fabricated through a dip-coating process. To exploit its superhydrophilic/superoleophobic property, the obtained sponge was used as a reusable water sorbent scaffold to collect water from bulk oils without absorbing any oil. Owing to its magnetic property, the sponge was manipulated remotely by a magnet without touching it directly during the whole water collection process, which could potentially lower the cost of the water collection process. Apart from acting as a water-absorbing material, the sponge can also be used as affiliation material to separate water from oil-water mixture and oil in water emulsion selectively, when fixed into a cone funnel. This research provides a key addition to the field of oil-water separation materials.
基金funded by Excellent Young Science and Technology Innovation Team of Hubei High School,Grant no[T201707]the Foundation of Science Research Program from the Hubei Provincial Department of Education,Grant no[Q20201711].
文摘Polypropylene(PP)membrane has been widely used in water purification and other fields owing to special pore structure,excellent mechanical properties and resistance to acids,alkalis and organic solvents.However,it is difficult for PP to introduce the hydrophilic chemical compositions for oil-water separation.Herein,superhydrophilic and underwater superoleophobic PP membranes were prepared by ALD for efficient gravity-driven oil-water separation.Owing to synergistic effect,oil contact angle of TiO_(2) coated PP membrane under water can reach above 150°.Hence,TiO_(2) coated PP membrane has great oil-repelling performance.Because of the superwetting property,TiO_(2) coated PP membrane can easily separate oil-water mixture and have high separation efficiency(more than 95%).The outstanding recyclability and mechanical stability of TiO_(2) coated PP membrane suggest the promising potential application in practical oil-water separation.
基金Supported by the National Natural Science Foundation of China(No.20873101)the Scientific Research Foundation of the Higher Education Institutions of Gansu Province(No.2016B-091)+3 种基金the General Program of the Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities(No.XZ1603)2015 National Training Program of Innovation and Entrepreneurship for Undergraduates(No.201510740004)2016 Provincial Training Program of Innovation and Entrepreneurship for Undergraduates(No.201610740004)the Sixth Scientific Innovation for College Students of Hexi University(No.001,No.117)~~
基金supported by the National Natural Science Foundation of China(Grant No.51705138).
文摘The fundamental relationship between microstructure,constituent,processing and performances of separating materials is really a vital issue.Traditional preparation methods for separation membranes are complex,time-consuming and easy to be fouled.Also,the durability of conventional coatings on membrane is poor.By combination of bioinspiration from mussel adhesive and fish scales’underwater superoleophobicity,we propose a general route to prepare organic-inorganic hybrid coatings,while no complex apparatus is needed.Specifically,based on the biomimetic adhesion of polydopamine(PDA),we used it as a binder to adhere TiO_(2)nanoparticles and built rough microstructure on fabric.In this way,we obtained TiO_(2)-PDA treated fabric with special wettability.These TiO_(2)-PDA treated samples owned superamphiphilicity in air,underwater superoleophobicity(underwater oil contact angles(OCAs)>150°),underoil superhydrophobicity(underoil water contact angles(WCAs)>150°),excellent multiresistance;and can separate polar/nonpolar liquid mixture effectively.It also owned superaerophobicity underwater(underwater bubble contact angles(BCAs)>150°).The proposed TiO_(2)-PDA coatings are highly expected to be employed for real situation of water pollution remediation,self-cleaning,oil extraction and harsh chemical engineering issues.
