Ultrarobust Ti3C2Tx MXene-Based Soft Actuators via Bamboo-Inspired Mesoscale Assembly of Hybrid Nanostructures.
writer：Cao, J.; Zhou, Z.; Song, Q.; Chen, K.; Su, G.; Zhou, T.; Zheng, Z.; Lu, C.; Zhang, X
keywords：MXenes, actuators, bionic structures, mesoscale assembly, hydrogen bonds
source：期刊
specific source：ACS nano
Issue time：2020年
Soft actuation materials are highly desirable in flflexible
electronics, soft robotics, etc. However, traditional bilayered actuators
usually suffffer from poor mechanical properties as well as deteriorated
performance reliability. Here, inspired by the delicate architecture of
natural bamboo, we present a hierarchical gradient structured soft
actuator via mesoscale assembly of micro?nano-scaled two-dimentional MXenes and one-dimentional cellulose nanofifibers with
molecular-scaled strong hydrogen bonding. The resultant actuator
integrates high tensile strength (237.1 MPa), high Young’s modulus
(8.5 GPa), superior toughness (10.9 MJ/m3
), and direct and fast
hygroscopic actuation within a single body, which is diffiffifficult to
achieve by traditional bilayered actuators. The proof-of-concept
prototype robot is demonstrated to emphasize its high mechanical robustness even after bending 100 000 times, kneading, or
being trampled by an adult (7 500 000 times heavier than a crawling robot). This bioinspired mesoscale assembly strategy
provides an approach for soft materials to the application of next-generation robust robotics.