期刊
MATERIALS TODAY PHYSICS
卷 29, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtphys.2022.100919
关键词
Gecko; dry adhesives; Infrared -responsive; Hydrogel; PDMS; Flexible arm gripper; Gradient
资金
- National Natural Science Foundation of China [51575528, 52211530034, 51875577]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Research Chairs Program
- Science Foundation of China University of Petroleum-Beijing [2462020XKJS01]
- U.S. National Science Foundation [2004251, 202006440137, 201908530039]
- China Scholarship Council
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [2004251] Funding Source: National Science Foundation
Inspired by the microstructure of gecko toes, a drivable bionic gecko toe adhesion surface with double-layer structure was designed and fabricated, which can achieve reversible transition of adhesion/desorption. This structurally optimized surface has great design potential and is expected to provide insights into the preparation of robots.
Inspired by the microstructure of gecko toes, a drivable bionic gecko toe adhesion surface with double-layer structure was designed and fabricated. The driving ability is derived from the volume shrinkage of the dehydrated hydrogel after the driving hydrogel layer is irradiated by near-infrared light (808 nm) (the temperature of the single-layer hydrogel can be increased from 17.9 degrees C to 107 degrees C within 30s, and the curling angle can be curled by 0 degrees -180 degrees, similar to the folded state.), and another layer with a microstructure similar to gecko toes can withstand a maximum shear force of 22.4N/cm-2. The different properties of the two layers are combined together to achieve a reversible transition of adhesion/desorption similar to the gecko walking process. The double-layer structure of the drivable bionic gecko toe adhesion surface was structurally optimized to prepare a four-arm gripper that could grasp/release only by unilateral irradiation. This bilayer-structured bionic gecko toe adhesion surface has great design potential, and in the future, it is hoped that it can provide insights into the preparation of large-actuated remote-controlled robots and fast-actuated soft robots.
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