Programming Anisotropic Functionality of 3D Microdenticles by Staggered-Overlapped and Multilayered Microarchitectures

作     者：Park, Jeong Eun Je, Hyeongmin Kim, Chae Ryean Park, Sudong Yu, Yeonuk Cho, Woongbi Won, Sukyoung Kang, Dong Jun Han, Tae Hee Kwak, Rhokyun Lee, Seung Goo Kim, Sanha Wie, Jeong Jae 

作者机构：Hanyang Univ Res Inst Ind Sci Dept Organ & Nano Engn Seoul 04763 South Korea Korea Adv Inst Sci & Technol Dept Mech Engn Daejeon 34141 South Korea Univ Ulsan Dept Chem Ulsan 44610 South Korea Hanyang Univ Dept Mech Convergence Engn Seoul 04763 South Korea Hanyang Univ Dept Organ & Nano Engn Human Tech Convergence Program Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol Dept Mech Convergence Engn Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol Dept Chem Engn Dept Organ & Nano EngnHuman Tech Convergence Prog Seoul 04763 South Korea SUNY Michael M Szwarc Polymer Res Inst Dept Chem Engn Coll Environm Sci & Forestry Syracuse NY 13210 USA 

出 版 物：《ADVANCED MATERIALS》 (先进材料)

年 卷 期：2024年第36卷第7期

页      面：2309518-2309518页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：National Research Foundation [FA2386-22-1-4086] Asian Office of Aerospace Research and Development of U.S. Government National Research Foundation (NRF) of Republic of Korea [NRF-2022R1A2C44001521] Individual Basic Science & Engineering Research grant Korea Advanced Institute of Science and Technology [2022R1A2C4002115] Ministry of Science and ICT NRF [2021R1A6A1A03038858] NRF - Ministry of Education Grant 

主　　题：biomimetics drag reduction electrical conductivity friction indentation MXene sharkskin 

摘      要：Natural sharkskin features staggered-overlapped and multilayered architectures of riblet-textured anisotropic microdenticles, exhibiting drag reduction and providing a flexible yet strong armor. However, the artificial fabrication of three-dimensional (3D) sharkskin with these unique functionalities and mechanical integrity is a challenge using conventional techniques. In this study, it is reported on the facile microfabrication of multilayered 3D sharkskin through the magnetic actuation of polymeric composites and subsequent chemical shape fixation by casting thin polymeric films. The fabricated hydrophobic sharkskin, with geometric symmetry breaking, achieves anisotropic drag reduction in frontal and backward flow directions against the riblet-textured microdenticles. For mechanical integrity, hard-on-soft multilayered mechanical properties are realized by coating the polymeric sharkskin with thin layers of zinc oxide and platinum, which have higher hardness and recovery behaviors than the polymer. This multilayered hard-on-soft sharkskin exhibits friction anisotropy, mechanical robustness, and structural recovery. Furthermore, coating the MXene nanosheets provides the fabricated sharkskin with a low electrical resistance of approximate to 5.3 omega, which leads to high Joule heating (approximate to 229.9 degrees C at 2.75 V). The proposed magnetomechanical actuation-assisted microfabrication strategy is expected to facilitate the development of devices requiring multifunctional microtextures. To mimic natural sharkskin exhibiting drag reduction and providing a flexible yet strong armor, microfabrication of multilayered 3D sharkskin comprising polymeric composites is suggested. 3D artificial sharkskin has staggered-overlapped and multilayered architectures with riblet-textured microdenticles which exhibit programmed anisotropic multifunction including drag reduction anisotropy, friction anisotropy, mechanical robustness, structural recovery, and Joule heating with