Bird's-Nest-Inspired, High-Temperature-Resistant Soft Robots with Enhanced Electromagnetic Interference Shielding

The rapid development of aerospace, artificial intelligence, and flexible wearable electronics has led to an increasing demand for multifunctional electromagnetic interference (EMI) shielding materials, especially for lightweight and high-strength biomimetic intelligent actuators. In this study, we...

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Veröffentlicht in:ACS applied materials & interfaces Jg. 17; H. 14; S. 21886
Hauptverfasser: Liu, Xianyuan, Zhou, Jinman, Lu, Xianyong, Liu, Zunfeng
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States 09.04.2025
Schlagworte:
repeatable programming
Kevlar
electromagnetic interference shielding
bird’s-nest-like
intelligent actuators
ISSN:1944-8252, 1944-8252
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Zusammenfassung:The rapid development of aerospace, artificial intelligence, and flexible wearable electronics has led to an increasing demand for multifunctional electromagnetic interference (EMI) shielding materials, especially for lightweight and high-strength biomimetic intelligent actuators. In this study, we present polyolefin elastomer/aramid nanofiber/carbon nanotube (POE/ANF/CNT) composites with a sandwich architecture fabricated via layer-by-layer technology. Actuation is achieved by exploiting the differential thermal expansion coefficients among the layers, where the POE functions as the active layer, while ANFs and CNTs serve as inert reinforcement layers. The bird's-nest-like CNT layer imparts the actuators with repeatable programming capabilities. These intelligent actuators exhibit rapid responses to light, electrical, and thermal stimuli, featuring a low activation energy, high actuation speed, significant deformation, and exceptional fatigue resistance. Inspired by paper cutting and origami techniques, the actuators achieve repeatable morphological programming and complex actuation behaviors. The POE/ANF/CNT composites also demonstrate effective EMI shielding (35.7 dB at 40 wt % CNTs), high tensile strength (39.1 MPa), superior Joule heating performance (301 °C at 20 V voltage), and excellent thermal stabilities (with a maximum decomposition temperature reaching 473 °C). These multifunctional intelligent materials hold significant potential for applications in flexible wearable electronic devices, EMI shielding, and soft robotics.
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ISSN:1944-8252
1944-8252
DOI:10.1021/acsami.5c02500