Stimuli-responsive hydrogel is regarded as one of the most promising smart soft materials for the next-generation advanced technologies and intelligence robots,but the limited variety of stimulus has become a non-negl...Stimuli-responsive hydrogel is regarded as one of the most promising smart soft materials for the next-generation advanced technologies and intelligence robots,but the limited variety of stimulus has become a non-negligible issue restricting its further development.Herein,we develop a new stimulus of“touch”(i.e.,spatial contact with foreign object)for smart materials and propose a flytrap-inspired touch-responsive polymeric hydrogel based on supersaturated salt solution,exhibiting multiple responsive behaviors in crystallization,heat releasing,and electric signal under touch stimulation.Furthermore,utilizing flytrap-like cascade response strategy,a soft actuator with touch-responsive actuation is fabricated by employing the touch-responsive hydrogel and the thermo-responsive hydrogel.This investigation provides a facile and versatile strategy to design touch-responsive smart materials,enabling a profound potential application in intelligence areas.展开更多
A novel bionic piezoelectric actuator based on the walrus motion to achieve high performance on large working stroke for micro/nano positioning systems is first proposed in this study.The structure of the proposed wal...A novel bionic piezoelectric actuator based on the walrus motion to achieve high performance on large working stroke for micro/nano positioning systems is first proposed in this study.The structure of the proposed walrus type piezoelectric actuator is described,and its motion principle is presented in details.An experimental system is set up to verify its feasibility and explore its working performances.Experimental results indicate that the proposed walrus type piezoelectric actuator could realize large working stroke with only one driving unit and one coupled clamping unit;the maximum stepping displacement isΔL max=19.5μm in the case that the frequency f=1 Hz and the voltage U=120 V;the maximum speed V max=2275.2μm·s^(-1) when the frequency f=900 Hz and the voltage U=120 V;the maximum vertical load m max=350 g while the voltage U=120 V and the frequency f=1 Hz.This study shows the feasibility of mimicking the bionic motion of the real walrus animal to the design of piezoelectric actuators,which is hopeful for the real application of micro/nano positioning systems to achieve large working stroke and high performance.展开更多
基金supported by the National Natural Science Foundation of China(52103152)China Postdoctoral Science Foundation(2021M690157)Ningbo Natural Science Foundation(2121J206).
文摘Stimuli-responsive hydrogel is regarded as one of the most promising smart soft materials for the next-generation advanced technologies and intelligence robots,but the limited variety of stimulus has become a non-negligible issue restricting its further development.Herein,we develop a new stimulus of“touch”(i.e.,spatial contact with foreign object)for smart materials and propose a flytrap-inspired touch-responsive polymeric hydrogel based on supersaturated salt solution,exhibiting multiple responsive behaviors in crystallization,heat releasing,and electric signal under touch stimulation.Furthermore,utilizing flytrap-like cascade response strategy,a soft actuator with touch-responsive actuation is fabricated by employing the touch-responsive hydrogel and the thermo-responsive hydrogel.This investigation provides a facile and versatile strategy to design touch-responsive smart materials,enabling a profound potential application in intelligence areas.
基金supported by the Natural Science Foundation of Zhejiang Province:LY19E050010,LY20E050009,LGF2OEO5OOO1General Research Projects of Zhejiang Provincial Department of Education:Y2019430382020-Y1-A-028,Hangzhou Innovation Institute,Beihang University.
文摘A novel bionic piezoelectric actuator based on the walrus motion to achieve high performance on large working stroke for micro/nano positioning systems is first proposed in this study.The structure of the proposed walrus type piezoelectric actuator is described,and its motion principle is presented in details.An experimental system is set up to verify its feasibility and explore its working performances.Experimental results indicate that the proposed walrus type piezoelectric actuator could realize large working stroke with only one driving unit and one coupled clamping unit;the maximum stepping displacement isΔL max=19.5μm in the case that the frequency f=1 Hz and the voltage U=120 V;the maximum speed V max=2275.2μm·s^(-1) when the frequency f=900 Hz and the voltage U=120 V;the maximum vertical load m max=350 g while the voltage U=120 V and the frequency f=1 Hz.This study shows the feasibility of mimicking the bionic motion of the real walrus animal to the design of piezoelectric actuators,which is hopeful for the real application of micro/nano positioning systems to achieve large working stroke and high performance.
