Triple-shape memory, magneto-response, and piezo-resistive flexible composites: multiple-sensing and switchable actuating

Flexible strain sensors made of conductive composites provide an opportunity for monitoring human motions and external stimuli. However, it is still in pursuit to fabricate multifunctional strain sensors with shape memory effects to further broaden the practical applications. Herein, we designed and...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2021-05, Vol.9 (2), p.6568-6578
Main Authors: Hu, Tao, Xuan, Shouhu, Shu, Quan, Xu, Zhenbang, Shen, Longjiang, Li, Jun, Gong, Xinglong
Format: Article
Language:English
Subjects:
Automation
Composite materials
Compressive properties
High temperature
Human motion
Liquid metals
Magnetic properties
Manufacturing engineering
Monitoring
Morphing
Morphology
Object recognition
Robotics
Sensors
Shape effects
Shape memory
Tensile strain
Tensile stress
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Summary:Flexible strain sensors made of conductive composites provide an opportunity for monitoring human motions and external stimuli. However, it is still in pursuit to fabricate multifunctional strain sensors with shape memory effects to further broaden the practical applications. Herein, we designed and fabricated a high-temperature liquid metal-based magneto-resistive strain sensor with a triple-shape memory effect, stimulus-dependent conductivity, and magnetically driven property. The shape memory effect endowed the sensor with the ability to adapt its morphology to detect and fix on the objects with an arbitrary shape. The stimulus-dependent conductivity caused the sensor to generate a corresponding electrical signal when it detected any human motion and magnetic field. The magnetically driven properties broadened the application of the sensor, such as a smart gripper. Therefore, this multifunctional flexible strain sensor could be a good candidate for future intelligent electronics such as e-skins, soft robotics, morphing structures, and biomedical devices. A high-temperature liquid metal (HLM) -based magneto-resistive strain sensor (PPLC sensor) with triple-shape memory effects, compressive strain/magnetic field-dependent conductivity, and magnetically driven property was developed.
ISSN:2050-7526
2050-7534
DOI:10.1039/d1tc01060c