Biomimetic Thermal-sensitive Multi-transform Actuator
2019-11-14 14:04:04 조회수298
Tae Hyeob Kim(1), Jung Gi Choi(1), Ju Young Byun(1), Yongwoo Jang(1), Sung Min Kim(2),Geoffrey. M. Spinks(3), Seon Jeong Kim(1) 1)Center for Self-Powered Actuation, Department of Biomedical Engineering, Hanyang University, Seoul, 04763, South Korea. // 2)Department of Physical Education, Department of Active Aging Industry, Hanyang University, Seoul, 04763, South Korea. // 3)ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, New South Wales, 2522, Australia. 원문 링크 :


Controllable and miniaturised mechanical actuation is one of the main challenges facing various emerging technologies, such as soft robotics, drug delivery systems, and microfluidics. Here we introduce a simple method for constructing actuating devices with programmable complex motions. Thermally responsive hydrogels based on poly(N-isopropylacrylamide) (PNIPAM) and its functionalized derivatives (f-PNIPAM) were used to control the lower critical solution temperature (LCST) or the temperature at which the gel volume changes. Techniques for ultra-violet crosslinking the monomer solutions were developed to generate gel sheets with controllable crosslink density gradients that allowed bending actuation to specified curvatures by heating through the LCST. Simple molding processes were then used to construct multi-transform devices with complex shape changes, including a bioinspired artificial flower that shows blossoming and reverse blossoming with a change in temperature. 

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