A new Janus mesh membrane with ultrafast directional water transportation and improved fog collection  

作　　者：Shiyu Song Yan Zhang Tianlu Yu Jianlin Yang 

机构地区：[1]College of Materials Science and Engineering,Liaoning Technical University,Fuxin 123000,China [2]College of Mining,Liaoning Technical University,Fuxin 123000,China

出　　处：《Journal of Materials Science & Technology》2024年第35期129-139,共11页材料科学技术(英文版)

基　　金：supported by the Scientific Research Funding Project of the Education Department of Liaoning Province(No.LJKZ0351).

摘　　要：Fog collection materials have been intensively investigated and can potentially be used to alleviate fresh-water shortages.However,developing highly efficient fog collection materials remains challenging.Requi-site improvements in fog collection technology are the ultrafast transportation of captured water and the effective regeneration of fresh regions on the surfaces of fog collection materials.Herein,a novel Janus mesh membrane(JMM)with an alternating hydrophobic-superhydrophilic-patterned hydrophobic surface and asymmetric wettability interface is prepared by a selective liquid-phase surface oxidation strategy.The unique structure and high-contrast wettability of the JMM enable ultrafast directional transportation of tiny water droplets(<0.1μL),thereby achieving an excellent water collection efficiency of 15.28 g h^(−1) cm^(−2),which is much higher than those of conventional Janus membranes.The JMM functioned as a versatile fog collector and maintained continuous fog collection regardless of the fog flow direction.This study offers a novel approach for preparing innovative fog collection materials and establishes a founda-tion for developing advanced fog collection systems suitable for diverse applications.

关 键 词：SUPERHYDROPHILIC HYDROPHOBIC Copper mesh Janus membrane Fog collection 

分 类 号：V24[航空宇航科学与技术—飞行器设计]