writer：Gui Zhang, Luke Yan,* LT Ji, CH Liu, Lei Zhang,* W Zhang, YJ Nie, P Xiao, and Tao Chen*
keywords：CNTs/PVDF Bilayer Actuator
source：期刊
specific source：Macromol. Mater. Eng. 2021, 306, 2000502
Issue time：2021年

A multiple stimuli-responsive actuator with an ability of rapid and sensitive responding is highly desirable for the development of biomimetic actuation applications. Herein, a bilayer actuator with fast and sensitive responses to acetone vapor and light stimuli is reported based on polyvinylidene fluoride (PVDF) membrane with a hierarchical porosity and macroscopic carbon nanotubes (CNTs) assembled film. The CNTs film with uniform and tunable thickness is prepared by a macroscopic interfacial assembly strategy and transferred integrally onto the PVDF membrane. Under the infrared light, this CNTs/PVDF bilayer actuator can bend rapidly within 1 s and generate large stress. Moreover, for the acetone vapor stimuli, the actuator bends within 0.19 s and also reverses in 1.24 s to the initial state, showing sensitive and fast responses to acetone stimuli, as well as outstanding stability and repeatability.