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Bio-Inspired Stimuli-Responsive Ti3C2Tx/PNIPAM Anisotropic Hydrogels for High-Performance Actuators
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-05-08 , DOI: 10.1002/adfm.202301982 Qian Yan 1 , Renjie Ding 1 , Haowen Zheng 1 , Pengyang Li 1 , Zonglin Liu 1 , Zhong Chen 1 , Jinhua Xiong 1 , Fuhua Xue 1 , Xu Zhao 1 , Qingyu Peng 1 , Xiaodong He 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-05-08 , DOI: 10.1002/adfm.202301982 Qian Yan 1 , Renjie Ding 1 , Haowen Zheng 1 , Pengyang Li 1 , Zonglin Liu 1 , Zhong Chen 1 , Jinhua Xiong 1 , Fuhua Xue 1 , Xu Zhao 1 , Qingyu Peng 1 , Xiaodong He 1
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Near-infrared (NIR) light-responsive hydrogels have the advantages of high precision, remote control and excellent biocompatibility, which are widely used in soft biomimetic actuators. The process by which water molecules diffuse can directly affect the deformation of hydrogel. Therefore, it remains a serious challenge to improve the response speed of hydrogel actuator. Herein, an anisotropic photo-responsive conductive hydrogel is designed by a directional freezing method. Due to the anisotropy of the MXene-based PNIPAM/MXene directional (PMD) hydrogel, its mechanical properties and conductivity are enhanced in a specific direction. At the same time, with the presence of the internal directional channels and the assistance of capillary force, the PMD hydrogel can achieve a volume deswelling of 70% in 2 s under light irradiation, further building a hydrogel actuator with a fast response performance. Additionally, the hydrogel actuator can lift an object 40 times its weight by a distance of 6 mm, realizing the advantages of both rapid responsiveness and high driving strength, which makes the hydrogel actuator have important application significance in remote control, microflow valve, and soft robot.
中文翻译：
用于高性能执行器的仿生刺激响应 Ti3C2TX/PNIPAM 各向异性水凝胶
近红外（NIR）光响应水凝胶具有高精度、远程控制和优异的生物相容性等优点，广泛应用于软仿生执行器中。水分子的扩散过程可以直接影响水凝胶的变形。因此，提高水凝胶致动器的响应速度仍然是一个严峻的挑战。本文通过定向冷冻方法设计了各向异性光响应导电水凝胶。由于基于 MXene 的 PNIPAM/MXene 定向（PMD）水凝胶的各向异性，其机械性能和电导率在特定方向上得到增强。同时，由于内部定向通道的存在以及毛细管力的辅助，PMD水凝胶在光照射下可以在2 s内实现70%的体积消溶，进一步构建具有快速响应性能的水凝胶致动器。此外，该水凝胶执行器可以将40倍自身重量的物体提升6毫米的距离，实现了响应速度快和驱动强度高的优点，这使得该水凝胶执行器在远程控制、微流量阀门、软体等方面具有重要的应用意义。机器人。
更新日期：2023-05-08
中文翻译：
用于高性能执行器的仿生刺激响应 Ti3C2TX/PNIPAM 各向异性水凝胶
近红外（NIR）光响应水凝胶具有高精度、远程控制和优异的生物相容性等优点，广泛应用于软仿生执行器中。水分子的扩散过程可以直接影响水凝胶的变形。因此，提高水凝胶致动器的响应速度仍然是一个严峻的挑战。本文通过定向冷冻方法设计了各向异性光响应导电水凝胶。由于基于 MXene 的 PNIPAM/MXene 定向（PMD）水凝胶的各向异性，其机械性能和电导率在特定方向上得到增强。同时，由于内部定向通道的存在以及毛细管力的辅助，PMD水凝胶在光照射下可以在2 s内实现70%的体积消溶，进一步构建具有快速响应性能的水凝胶致动器。此外，该水凝胶执行器可以将40倍自身重量的物体提升6毫米的距离，实现了响应速度快和驱动强度高的优点，这使得该水凝胶执行器在远程控制、微流量阀门、软体等方面具有重要的应用意义。机器人。
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