Bio‑imitative Synergistic Color‑Changing and Shape‑Morphing Elastic Fibers with a Liquid Metal Core  

作　　者：Seonwoo Mun Sangmin Lee Kwak Jin Bae Yejin Bae Hye‑Min Lee Byung‑Joo Kim Jaesang Yu Sungjune Park 

机构地区：[1]Department of Nano Convergence Engineering,Department of Polymer‑Nano Science and Technology,Jeonbuk National University,Jeonju 54896,Republic of Korea [2]Institute of Advanced Composite Materials,Korea Institute of Science and Technology(KIST),Chudong‑Ro 92,Bongdong‑Eup,Wanju‑Gun 55324,Jeollabukdo,Korea [3]R&BD Group 1,Industrialization Division,Korea Carbon Industry Promotion Agency,Jeonju 54853,Republic of Korea [4]Department of Advanced Materials and Chemical Engineering,Jeonju University,Jeonju 55069,Republic of Korea [5]School of Chemical Engineering,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea

出　　处：《Advanced Fiber Materials》2024年第3期900-910,共11页先进纤维材料（英文）

基　　金：supported by a National Research Foundation of Korea(NRF)grant funded by the Republic of Korea government(MSIT)(2021R1C1C1005083 and RS-2023-00207836);the Technology Innovation Program(20013038)funded by the Ministry of Trade,Industry and Energy(MOTIE,Republic of Korea).

摘　　要：The systematic integration of color-changing and shape-morphing abilities into entirely soft devices is a compelling strategy for creating adaptive camouflage,electronic skin,and wearable healthcare devices.In this study,we developed soft actuators capable of color change and programmable shape morphing using elastic fibers with a liquid metal core.Once the hollow elastic fiber with the thermochromic pigment was fabricated,liquid metal(gallium)was injected into the core of the fiber.Gallium has a relatively low melting point(29.8℃);thus,fluidity and metallic conductivity are preserved while strained.The fiber can change color by Joule heating upon applying a current through the liquid metal core and can also be actuated by the Lorentz force caused by the interaction between the external magnetic field and the magnetic field generated around the liquid metal core when a current is applied.Based on this underlying principle,we demonstrated unique geometrical actuations,including flower-like blooming,winging butterflies,and the locomotion of coil-shaped fibers.The color-changing and shape-morphing elastic fiber actuators presented in this study can be utilized in artificial skin,soft robotics,and actuators.

关 键 词：Electromagnetic actuator Liquid metal Soft electronic Thermochromic elastic fiber Bio-inspired actuator 

分 类 号：TB34[一般工业技术—材料科学与工程]