Bioinspired Flexible Film as Intelligent Moisture-Responsive Actuators and Noncontact Sensors
Yuanhang Ge,
Jiaxi Zeng,
Bo Hu,
Dong-Yuan Yang,
Yizhen Shao,
Hongbin Lu
Affiliations
Yuanhang Ge
State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, Shanghai 200438, China
Jiaxi Zeng
State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, Shanghai 200438, China
Bo Hu
State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, Shanghai 200438, China
Dong-Yuan Yang
Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China; Shaanxi Yanchang Petroleum (Group) Corp. Ltd., Xi'an 710069, China
Yizhen Shao
State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, Shanghai 200438, China; Corresponding authors.
Hongbin Lu
State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers & Polymer Composites, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, Shanghai 200438, China; Yiwu Research Institute of Fudan University, Chengbei Road, Yiwu, Zhejiang 322000, China; Corresponding authors.
Inspired by nature organisms, flexible moisture-responsive actuators and sensors fabricated by hydrophilic 2D materials have attracted increased demands by utilizing water in a green and renewable way. Graphene oxide (GO) and MXene have shown great potential in moisture-responsive actuators and sensors due to their superior properties and strong interaction with water. Bioinspired actuators with nacre-like structure have been successfully fabricated by anchoring MXene and GO into bacterial cellulose fibers, which exhibit excellent moisture-driven performance with superior mechanical properties and ambient antioxidation. The flexible actuator demonstrates sensitive response to moisture with intensive deformation. It is demonstrated that the moisture-responsive smart devices are able to function as an electrical switch and robotic gripper. Furthermore, a noncontact control system can also be implemented via monitoring the respiration and the humidity on the human skin surface. Devices with effective and sensitive response to solvent and temperature have also been demonstrated by the fabricated composite film. This work overcomes the shortcomings of the actuators prepared by MXene, offering a facile approach to fabricate flexible moisture-responsive actuators and sensors with wider applications.
