Bioinspired Double-stranded Yarn with Alternating Hydrophobic/Hydrophilic Patterns for High-efficiency Fog Collection  

作　　者：Lan-Lan Hou Meng-Na Qiu Ya-Qiong Wang Tong-Hua Bai Zhi-Min Cui Jing-Chong Liu Ying-Qun Qi Nü Wang Yong Li Yong Zhao 

机构地区：[1]Beijing Institute of Graphic Communication,Beijing,102600,China [2]Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education,Beijing Key Laboratory of Bioinspired Energy Materials and Devices,School of Chemistry,Beijing Advanced Innovation Center for Biomedical Engineering,Beihang University,Beijing,100191,China [3]Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China [4]Beijing Key Laboratory for Bioengineering and Sensing,Technology,Daxing Research Institute,School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing,100083,China

出　　处：《Chinese Journal of Polymer Science》2024年第7期968-975,I0008,共9页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22105012,21975007,22175007 and 52172080);Beijing Natural Science Foundation(Nos.2242035,2242041,2232054 and 2232037);the National Natural Science Foundation for Outstanding Youth Foundation;the Fundamental Research Funds for the Central Universities;the National Program for Support of Top-notch Young Professionals;the 111 project(No.B14009);the Youth Excellence Project of Beijing Institute of Graphic Communication(No.Ea202403);the Scientific Research Foundation of Beijing Institute of Graphic Communication(No.27170124031)。

摘　　要：Efforts to develop innovative water harvesting strategies offer powerful solutions to alleviate the water crisis,especially in remote and arid areas.Inspired by the hydrophobic/hydrophilic pattern of desert beetles and water self-propulsion property of spider silks,a double-strand hydrophobic PVDF-HFP/hydrophilic PAN nanofibers yarn is proposed by electrospinning and twisting techniques.The double-strand cooperation approach allows for water deposition on hydrophobic PVDF-HFP segment and transport under the asymmetric capillary driving force of hydrophilic PAN segment,thus speeded up the aggregation and growth of droplets.The effects of the composition and the diameter ratio of the two primary yarns were studied and optimized for boosting fog collection performance.The double-strand anisotropic yarn not only provide an effective method for water harvesting,but also hold the potential to inspire innovative design concepts for fog collection materials in challenging environments.

关 键 词：Fog collection Wettability Electrospinning Nanofibers Spider silk 

分 类 号：TQ340.64[化学工程—化纤工业] TB383.1[一般工业技术—材料科学与工程]