Solar-driven evaporators are promising for tackling freshwater scarcity but still challenged in simultaneously realizing comprehensive performances at one platform for sustainable and efficient application in real-wor...Solar-driven evaporators are promising for tackling freshwater scarcity but still challenged in simultaneously realizing comprehensive performances at one platform for sustainable and efficient application in real-world environments,such as stablefloating,scalability,salt-resistance,efficient vaporization,and anti-oil-fouling property.Herein,we design a hybrid organohydrogel evaporator to achieve the enduring oil contamination repulsion with maintaining accelerated evaporation process,and integrate capacities of ultra-stable floating,hindered salt-crystallization,large-scale fabrication for practical purification of seawater and polluted solutions.The raised water surface surrounding evaporators,induced by low density of organogel-phase,results in oil contamination resistance through the lateral capillary repulsion effect.Meanwhile,the organogel-phase containing photo-thermal carbon-nanotubes with low thermal capacity and conduction can form locally confined hot dots under solar irradiation and reduce heat dissipation on heating excessive water.Therefore,based on this approach,accelerated long-term practical purification of oilcontaminated solutions without any extra disposal is realized.Considering other properties of ultra-stable floating,large-scale fabrication,and anti-salt crystallization,these innovative organohydrogel evaporators open pathways for purifying oil-slickpolluted water via interfacial evaporation and are anticipated accelerating industrialization of efficient and sustainable solar-driven water purification.展开更多
When contacting with lotus leaves,water droplets keep nearly spherical and can roll off easily.This is the famous self-cleaning phenomenon of superhydrophobic lotus leaves with micro-and nano-structures and low surfac...When contacting with lotus leaves,water droplets keep nearly spherical and can roll off easily.This is the famous self-cleaning phenomenon of superhydrophobic lotus leaves with micro-and nano-structures and low surface energy.Nowadays,on the basis of self-cleaning,the artificial superhydrophobic surfaces have been developed for various emerging applications,such as anti-icing,anti-fogging,anti-corrosion,antibiofouling and drag reduction[1].However,these superhydrophobic surfaces are limited by their mechanical vulnerability in further practical applications[2]for the high local pressures suffered by the fragile micro-and nano-structures under abrasion.Although several strategies have attempted to improve robustness by introducing adhesion layers[3]or sacrificing upper structures[4],they hardly meet the demand of robustness in practice.展开更多
Wet adhesion has widespread applications in the fields of wearable electronics,medical devices and intelligent robots.In nature,many organisms have evolved with unique wet adhesion properties to adapt to complex habit...Wet adhesion has widespread applications in the fields of wearable electronics,medical devices and intelligent robots.In nature,many organisms have evolved with unique wet adhesion properties to adapt to complex habitats and climb in wet environments without falling.Tree frogs,as crawling masters in tropical rain forests,are representative of wet adhesion and give novel inspirations to design artificial wet adhesive materials by mimicking their specialised hexagonal structures and/or mucus composition.In this review,we first overview the research progress of tree frog toe pads from the perspective of toe pad structure and adhesion mechanism.Then,wet adhesive materials inspired by tree frog toe pads are systematically summarised from(i)the typical polymers,(ii)the preparation approaches,(iii)the adhesion test methods and(iv)the typical artificial adhesion surfaces.Third,various applications of bioinspired wet adhesive surfaces are highlighted.Finally,we present future challenges and opportunities to develop tree frog-inspired wet adhesive materials.展开更多
基金support from the National Key R&D Program of China(Nos.2018YFA0209500 and 2019YFA0709300)the National Natural Science Foundation of China(Nos.21621091,21972155,21975209,22005255,22035008,and 52025132)+1 种基金Projects of International Cooperation and Exchanges NSFC(No.1A1111KYSB20200010)National Program for Special Support of Eminent Professionals and the Fundamental Research Funds for Central Universities(No.20720190037).
文摘Solar-driven evaporators are promising for tackling freshwater scarcity but still challenged in simultaneously realizing comprehensive performances at one platform for sustainable and efficient application in real-world environments,such as stablefloating,scalability,salt-resistance,efficient vaporization,and anti-oil-fouling property.Herein,we design a hybrid organohydrogel evaporator to achieve the enduring oil contamination repulsion with maintaining accelerated evaporation process,and integrate capacities of ultra-stable floating,hindered salt-crystallization,large-scale fabrication for practical purification of seawater and polluted solutions.The raised water surface surrounding evaporators,induced by low density of organogel-phase,results in oil contamination resistance through the lateral capillary repulsion effect.Meanwhile,the organogel-phase containing photo-thermal carbon-nanotubes with low thermal capacity and conduction can form locally confined hot dots under solar irradiation and reduce heat dissipation on heating excessive water.Therefore,based on this approach,accelerated long-term practical purification of oilcontaminated solutions without any extra disposal is realized.Considering other properties of ultra-stable floating,large-scale fabrication,and anti-salt crystallization,these innovative organohydrogel evaporators open pathways for purifying oil-slickpolluted water via interfacial evaporation and are anticipated accelerating industrialization of efficient and sustainable solar-driven water purification.
文摘When contacting with lotus leaves,water droplets keep nearly spherical and can roll off easily.This is the famous self-cleaning phenomenon of superhydrophobic lotus leaves with micro-and nano-structures and low surface energy.Nowadays,on the basis of self-cleaning,the artificial superhydrophobic surfaces have been developed for various emerging applications,such as anti-icing,anti-fogging,anti-corrosion,antibiofouling and drag reduction[1].However,these superhydrophobic surfaces are limited by their mechanical vulnerability in further practical applications[2]for the high local pressures suffered by the fragile micro-and nano-structures under abrasion.Although several strategies have attempted to improve robustness by introducing adhesion layers[3]or sacrificing upper structures[4],they hardly meet the demand of robustness in practice.
基金National Natural Science Foundation of China,Grant/Award Numbers:21972155,21988102,22035008the Key Research Program of the Chinese Academy of Sciences,Grant/Award Number:XDPB24+1 种基金China Postdoctoral Science Foundation,Grant/Award Number:2022M713225International Partnership Program of Chinese Academy of Sciences,Grant/Award Number:1A1111KYSB20200010。
文摘Wet adhesion has widespread applications in the fields of wearable electronics,medical devices and intelligent robots.In nature,many organisms have evolved with unique wet adhesion properties to adapt to complex habitats and climb in wet environments without falling.Tree frogs,as crawling masters in tropical rain forests,are representative of wet adhesion and give novel inspirations to design artificial wet adhesive materials by mimicking their specialised hexagonal structures and/or mucus composition.In this review,we first overview the research progress of tree frog toe pads from the perspective of toe pad structure and adhesion mechanism.Then,wet adhesive materials inspired by tree frog toe pads are systematically summarised from(i)the typical polymers,(ii)the preparation approaches,(iii)the adhesion test methods and(iv)the typical artificial adhesion surfaces.Third,various applications of bioinspired wet adhesive surfaces are highlighted.Finally,we present future challenges and opportunities to develop tree frog-inspired wet adhesive materials.
