Fiber‐Shaped, Stretchable Strain Sensors with High Linearity by One‐Step Injection Molding for Structural Health Monitoring

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Abstract Fiber‐shaped strain sensors have attracted considerable attention due to their exceptional stretchability, conductivity, and flexibility, making them promising for applications in wearable electronics, smart textiles, structural health monitoring. However, most reported ones based on elastic conductive fibers are fabricated by blending materials with polymers, lacking effective encapsulation resist environmental interferences such as dust water. Inspired the myelin sheath of nerve fibers, a fiber‐shaped, stretchable sensor featuring an silicone tube is developed layer hybrid film sensing layer. The difference rebound hysteresis capacity between effectively enhances sensor's recovery after stretching. Experimental results demonstrate that exhibit linearity up 0.9958, stretchability 100% strain, outstanding cyclic stability over 7 000 loading‐unloading cycles. Furthermore, demonstrates multi‐functionality monitoring temperature, pressure while maintaining robust water resistance. Application tests large‐scale bridges agricultural greenhouses validated its effectiveness monitoring, showcasing significant potential use systems. resilience facilitates deployment real‐world scenarios minimizing interference from external factors.

Language: Английский

Advances in Crack-Based Strain Sensors on Stretchable Polymeric Substrates: Crack Mechanisms, Geometrical Factors, and Functional Structures

Polymers, Journal Year: 2025, Volume and Issue: 17(7), P. 941 - 941

Published: March 30, 2025

This review focuses on deepening the structural understanding of crack-based strain sensors (CBSS) stretchable and flexible polymeric substrates promoting sensor performance optimization. CBSS are cutting-edge devices that purposely incorporate cracks into their functional elements, thereby achieving high sensitivity, wide working ranges, rapid response times. To optimize CBSS, systematic research characteristics is essential. comprehensively analyzes key factors determining such as crack mechanism, geometrical factors, structures proposes optimization strategies grounded in these insights. In addition, we explore potential numerical analysis machine learning to offer novel perspectives for Following this, introduce various applications CBSS. Finally, discuss current challenges future prospects research, providing a roadmap next-generation technologies.

Language: Английский

Flexible Vibration Sensors with Omnidirectional Sensing Enabled by Femtosecond Laser-Assisted Fabrication

Polymers, Journal Year: 2025, Volume and Issue: 17(2), P. 211 - 211

Published: Jan. 16, 2025

Vibration sensors are integral to a multitude of engineering applications, yet the development low-cost, easily assembled devices remains formidable challenge. This study presents highly sensitive flexible vibration sensor, based on piezoresistive effect, tailored for detection high-dynamic-range vibrations and accelerations. The sensor’s design incorporates polylactic acid (PLA) housing with cavities spherical recesses, polydimethylsiloxane (PDMS) membrane, electrodes that positioned above. Employing femtosecond laser ablation template transfer techniques, parallel groove array is created within polymer sensing layer. includes conductive pathways, integrates stainless-steel balls as oscillators further amplify sensitivity. performance evaluated over frequency range 50 Hz 400 from 1 g 5 accelerations, exhibiting linear correlation coefficient 0.92 between voltage output acceleration. It demonstrates stable accurate responses signals such drills mobile phone ringtones, well robust responsiveness omnidirectional long-distance vibrations. simplicity in microstructure fabrication, ease assembly, low cost render it promising applications machinery rotating or vibrating components.

Language: Английский