Fog harvesting has been considered as a promising method for solving water crisis in underdeveloped regions.To mimic and optimize the alleged natural fog harvesting ability of the stenocara beetle,hybrid superhydropho...Fog harvesting has been considered as a promising method for solving water crisis in underdeveloped regions.To mimic and optimize the alleged natural fog harvesting ability of the stenocara beetle,hybrid superhydrophobic(hydrophobic,superhydrophilic)/hydrophilic patterns are processed on stainless steel via picosecond laser direct writing.Basically,after laser processing,the surfaces of stainless steel change from hydrophilic to superhydrophilic.Then,after chemical and heat treatment,the superhydrophilic surfaces become superhydrophobic with ultra-low adhesion,and superhydrophobic(hydrophobic)with ultra-high adhesion,respectively.This work systematically examines the fog harvesting ability of picosecond laser treated surfaces(LTS),pristine surfaces(PS),laser and chemical treated surfaces(LCTS),laser and heat-treated surfaces(LHTS).Compared with the PS,the as-prepared surfaces enhanced the fog harvesting efficiency by 50%.This work provides a fast and simple method to fog collectors,which offer a great opportunity to develop water harvesters for real world applications.展开更多
Efficient collection of water from fog provides a potential solution to solve the global freshwater shortage problem, particularly in the desert or arid regions. In this work, a flexible and highly efficient fog colle...Efficient collection of water from fog provides a potential solution to solve the global freshwater shortage problem, particularly in the desert or arid regions. In this work, a flexible and highly efficient fog collector was prepared by mimicking the back exoskeleton structure of the Namib desert beetle. The improved fog collector was constructed by a superhydrophobic-superhydrophilic patterned fabric via a simple weaving method, followed by in-situ deposition of copper particles. Compared with the conventional fog collector with a plane structure, the fabric has shown a higher water-harvesting rate at 1432.7 mg/h/cm2,owing to the biomimetic three-dimensional structure, its enhanced condensation performance enabled by the copper coating and the rational distribution of wetting units. The device construction makes use of the widely available textile materials through mature manufacturing technology, which makes it highly suitable for large-scale industrial production.展开更多
With the explosive growth of the world's population and the rapid increase in industrial water consumption,the world's water supply has fallen into crisis.The shortage of fresh water resources has become a glo...With the explosive growth of the world's population and the rapid increase in industrial water consumption,the world's water supply has fallen into crisis.The shortage of fresh water resources has become a global problem,especially in arid regions.In nature,many organisms can collect water from foggy water under harsh conditions,which provides us with inspiration for the development of new functional fog harvesting materials.A large number of bionic special wettable synthetic surfaces are synthesized for water mist collection.In this review,we introduce some water collection phenomena in nature,outline the basic theories of biological water harvesting,and summarize six mechanisms of biological water collection:increased surface wettability,increased water transmission area,long-distance water delivery,water accumulation and storage,condensation promotion,and gravity-driven.Then,the water collection mechanisms of three typical organisms and their synthesis are discussed.And their function,water collection efficiency,new developments in their biomimetic materials are narrated,which are cactus,spider and desert beetles.The study of multiple bionics was inspired by the discovery of Nepenthes,moist and smooth peristome.The excellent characteristics of a variety of biological water collection structures,combined with each other,are far superior to other single synthetic surfaces.Furthermore,the main problems in the preparation and application of biomimetic fog harvesting materials and the future development trend of materials fog harvesting are prospected.展开更多
Slippery lubricant-infused surfaces exhibit excellent fog-harvesting capacities compared with superhydrophobic and superhydrophilic surfaces.However,lubricant depletion is typically unavoidable under dynamic condition...Slippery lubricant-infused surfaces exhibit excellent fog-harvesting capacities compared with superhydrophobic and superhydrophilic surfaces.However,lubricant depletion is typically unavoidable under dynamic conditions,and reinfused oil is generally needed to recover the fog-harvesting capacity.Herein,an effective strategy for delaying the depletion of lubricant to prolong the service life of fog harvesting is proposed.An ultrathin transparent lubricant self-replenishing slippery surface was fabricated via facile one-step solvent evaporation polymerization.The gel film of the lubricant self-replenishing slippery surface,which was embedded with oil microdroplets,was attached to glass slides via the phase separation and evaporation of tetrahydrofuran.The gel film GFs-150(with oil content 150 wt%of aminopropyl-terminated polydimethyl siloxane(PDMS–NH2))exhibited superior slippery and fog-harvesting performance to other gel films.Furthermore,the slippery surfaces with the trait of oil secretion triggered by mechanical stress exhibited better fog-harvesting capabilities and longer service life than surfaces without the function of lubricant self-replenishment.The lubricant self-replenishing,ultrathin,and transparent slippery surfaces reported herein have considerable potential for applications involving narrow spaces,visualization,long service life,etc.展开更多
基金Project(52075302)supported by the National Natural Science Foundation of ChinaProject(ZR2021QE247)supported by the Shandong Provincial Natural Science Foundation,China+2 种基金Projects(ZR2018ZB0521,ZR2018ZA0401)supported by the Major Basic Research of Shandong Provincial Natural Science Foundation,ChinaProject(Kfkt2020-09)supported by the Open Research Fund of State Key Laboratory of High Performance Complex Manufacturing,Central South University,ChinaProject(52075302)supported by the Key Laboratory of High-efficiency and Clean Mechanical Manufacture(Shandong University),Ministry of Education,China。
文摘Fog harvesting has been considered as a promising method for solving water crisis in underdeveloped regions.To mimic and optimize the alleged natural fog harvesting ability of the stenocara beetle,hybrid superhydrophobic(hydrophobic,superhydrophilic)/hydrophilic patterns are processed on stainless steel via picosecond laser direct writing.Basically,after laser processing,the surfaces of stainless steel change from hydrophilic to superhydrophilic.Then,after chemical and heat treatment,the superhydrophilic surfaces become superhydrophobic with ultra-low adhesion,and superhydrophobic(hydrophobic)with ultra-high adhesion,respectively.This work systematically examines the fog harvesting ability of picosecond laser treated surfaces(LTS),pristine surfaces(PS),laser and chemical treated surfaces(LCTS),laser and heat-treated surfaces(LHTS).Compared with the PS,the as-prepared surfaces enhanced the fog harvesting efficiency by 50%.This work provides a fast and simple method to fog collectors,which offer a great opportunity to develop water harvesters for real world applications.
基金National Natural Science Foundation of China(5197206321501127+3 种基金51502185)Natural Science Foundation of Fujian Province(2019J01256)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX191916)the funds from China postdoctoral science foundation grant(2019TQ0061)。
文摘Efficient collection of water from fog provides a potential solution to solve the global freshwater shortage problem, particularly in the desert or arid regions. In this work, a flexible and highly efficient fog collector was prepared by mimicking the back exoskeleton structure of the Namib desert beetle. The improved fog collector was constructed by a superhydrophobic-superhydrophilic patterned fabric via a simple weaving method, followed by in-situ deposition of copper particles. Compared with the conventional fog collector with a plane structure, the fabric has shown a higher water-harvesting rate at 1432.7 mg/h/cm2,owing to the biomimetic three-dimensional structure, its enhanced condensation performance enabled by the copper coating and the rational distribution of wetting units. The device construction makes use of the widely available textile materials through mature manufacturing technology, which makes it highly suitable for large-scale industrial production.
基金This work is supported by the National Nature Science Foundation of China(No.51735013).
文摘With the explosive growth of the world's population and the rapid increase in industrial water consumption,the world's water supply has fallen into crisis.The shortage of fresh water resources has become a global problem,especially in arid regions.In nature,many organisms can collect water from foggy water under harsh conditions,which provides us with inspiration for the development of new functional fog harvesting materials.A large number of bionic special wettable synthetic surfaces are synthesized for water mist collection.In this review,we introduce some water collection phenomena in nature,outline the basic theories of biological water harvesting,and summarize six mechanisms of biological water collection:increased surface wettability,increased water transmission area,long-distance water delivery,water accumulation and storage,condensation promotion,and gravity-driven.Then,the water collection mechanisms of three typical organisms and their synthesis are discussed.And their function,water collection efficiency,new developments in their biomimetic materials are narrated,which are cactus,spider and desert beetles.The study of multiple bionics was inspired by the discovery of Nepenthes,moist and smooth peristome.The excellent characteristics of a variety of biological water collection structures,combined with each other,are far superior to other single synthetic surfaces.Furthermore,the main problems in the preparation and application of biomimetic fog harvesting materials and the future development trend of materials fog harvesting are prospected.
基金This work was financially supported by the National Natural Science Foundation of China(No.51735013).
文摘Slippery lubricant-infused surfaces exhibit excellent fog-harvesting capacities compared with superhydrophobic and superhydrophilic surfaces.However,lubricant depletion is typically unavoidable under dynamic conditions,and reinfused oil is generally needed to recover the fog-harvesting capacity.Herein,an effective strategy for delaying the depletion of lubricant to prolong the service life of fog harvesting is proposed.An ultrathin transparent lubricant self-replenishing slippery surface was fabricated via facile one-step solvent evaporation polymerization.The gel film of the lubricant self-replenishing slippery surface,which was embedded with oil microdroplets,was attached to glass slides via the phase separation and evaporation of tetrahydrofuran.The gel film GFs-150(with oil content 150 wt%of aminopropyl-terminated polydimethyl siloxane(PDMS–NH2))exhibited superior slippery and fog-harvesting performance to other gel films.Furthermore,the slippery surfaces with the trait of oil secretion triggered by mechanical stress exhibited better fog-harvesting capabilities and longer service life than surfaces without the function of lubricant self-replenishment.The lubricant self-replenishing,ultrathin,and transparent slippery surfaces reported herein have considerable potential for applications involving narrow spaces,visualization,long service life,etc.
基金Key Science Foundation Project of Henan Province(232300421146)the National Natural Science Foundation of China(NSFC,21905076)to Ju J+2 种基金the NSFC(22172045 and 21905077)to Yao X,and the NSFC(22205056)the Key Research Program of Higher Education of Henan Province(22A430003)to Luo YQsupported by CAS Key Laboratory of Bio-inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry。
