材料科学
自愈水凝胶
执行机构
各向异性
纳米技术
生物相容性
人工肌肉
响应时间
光电子学
复合材料
计算机科学
光学
高分子化学
人工智能
冶金
计算机图形学(图像)
物理
作者
Yan Qian,Ran Ding,Haowen Zheng,Pengyang Li,Zonglin Liu,Zhong Chen,Jinhua Xiong,Fuhua Xue,Xu Zhao,Qingyu Peng,Xiaodong He
标识
DOI:10.1002/adfm.202301982
摘要
Abstract 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.
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