Oral PresentationNature-inspired multiscale superwetting surfaces: design and bionic manufacturing
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更新：2024-04-25 12:47:12 浏览：377次
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摘要
As the core portion with which other things first interacts, biologic surfaces underpin the frequent dealing of mass, energy, and information, which allows living beings to avoid harm and harvest limited resources. The ingenious functions including antifouling, camouflage, cooling, light harvest, water harvest, and locomotion originated from the multiscale superwetting structures, and have found broad applications in aerospace, naval navigation, nuclear power, and biomedicine. However, traditional research faces challenges of the small size effect and the resultant poor structural mechanical stability and low mass transfer efficiency. Additional concerns are the scalability and efficiency of the method for fabricating biomimetic structures. In this talk, we first show two surface designs, including a monolithic perfluorinated surface (MPS) design and a cellular design. The use of nonlinear behavior and mechanochemical control of surface components enhanced the structural and functional stability of superhydrophobic structures, and allow us to regulate droplet, bubbles, and particle with minimized sizes. The design principles are contrary to conventional wisdom—using highly rigid structures to bear the concentrated stress yet failing once slight deformation and fracture occur. Second, we present two manufacturing methods, i.e., crack engineering and template-assisted self-assembly for precisely fabricating 3D hierarchical biomimetic structures, yet without compromising the scalability and efficiency. Our fundings potentially lay down the theoretical basis and technological support for the low-carbon and intelligent applications of nature-inspired surfaces.
关键词
Surface science, surface engineering, multiscale wettability, bionic manufacturing
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