| LUO Hong,MEI Yi,WEI Han,ZHOU Xueqiu,QIN Bingli,WANG Xikui.Research Progress and Application of Biomimetic Fiber Water Harvesting[J],53(22):16-34 |
| Research Progress and Application of Biomimetic Fiber Water Harvesting |
| Received:January 04, 2024 Revised:March 15, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.22.002 |
| KeyWord:biomimetic fiber surface wetting cold condensation directional transport droplet removal |
| Author | Institution |
| LUO Hong |
School of Mechanical Engineering, Guizhou University, Guiyang , China |
| MEI Yi |
School of Mechanical Engineering, Guizhou University, Guiyang , China |
| WEI Han |
School of Mechanical Engineering, Guizhou University, Guiyang , China |
| ZHOU Xueqiu |
School of Mechanical Engineering, Guizhou University, Guiyang , China |
| QIN Bingli |
School of Mechanical Engineering, Guizhou University, Guiyang , China |
| WANG Xikui |
School of Mechanical Engineering, Guizhou University, Guiyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Water is the source of life and an indispensable natural resource in the process of human production, life and social development. However, water shortage is a serious challenge faced by all countries in the world. Solving the problem of water scarcity is a serious challenge faced by the global community. Previous studies have shown that mimicking natural structures like spider silk to extract water from the air is a feasible way to alleviate the water crisis. This method has advantages such as low cost, easy accessibility, and energy efficiency, making it a hot topic in the field of biomimetic water harvesting. Therefore, it is necessary to summarize the research progress of biomimetic fiber water harvesting. The work aims to provide a comprehensive review on the basic wetting theory, the mechanism of liquid droplet directional transport and water harvesting, as well as the design features and preparation of biomimetic fibers. The basic wetting theory models are introduced, including Young's equation, Wenzel model, and Cassie-Baxter model. At the same time, the harvesting of water droplets on fibers is divided into three stages of cold condensation, directional transport, and droplet removal. The main principles of fiber water harvesting are expounded, including difference in Laplace pressure, surface energy gradient, hysteresis effects, and hanging ability, as well as the key factors affecting water harvesting efficiency. Common strategies for the three stages of optimization are also listed. Combining the non-uniform wettability design with the biological special structure can promote the droplet cold condensation. The microstructures promoting droplet directional transport include spider silk spindle knot, cactus spine structure, and Sarracenia groove structure. The design of hollow spindle knot and a bioinspired helical-groove-modified spindle-knot can improve the hanging ability of fiber. The low hysteresis of hydrophobic and smooth surfaces is used to accelerate droplet removal. At the same time, efficient desorption can also be achieved through self-induced droplet jump, droplet sweep and droplet collision during droplet dropping. Ideas are provided for the design of efficient water-harvesting fibers and how to balance the constraints between droplet condensation and droplet removal. Furthermore, the main biomimetic objects, biomimetic principles, and the primary preparation techniques of biomimetic fiber structures are discussed. The bionic fiber is mainly inspired by the spindle knot structure of spider silk. Many biomimetic knotting fibers use different methods to make various types of knots, including commonly used methods such as dip coating, fluid coating, electrospinning microfluidic control, as well as more precise emerging methods like dynamic interface spinning and 3D printing. The advantages and disadvantages of different preparation techniques and their applicable scenarios are analyzed. Additionally, the water harvesting characteristics and efficiency of biomimetic fiber mesh water harvesters are compared. Finally, the application prospects of biomimetic fiber water harvesting technology in atmospheric water harvesting, seawater desalination, industrial steam recovery, and oil-water separation are summarized, and the future development and existing shortcomings of biomimetic fiber water harvesting technology are put forward. This will help to comprehensively understand the mechanism and behavior of fiber water harvesting, and promote the development of water harvesting efficiency, harvester design, fluid control, and functional materials in various fields. |
| Close |
|
|
|