Novel Polyurethane Based, Fully Flexible, High-Performance Piezoresistive Sensor for Real-Time Pressure Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(19), P. 25422 - 25431

Published: May 2, 2024

Flexible piezoresistive pressure sensors are garnering substantial attention, in line with advancements biointegrated and wearable electronics. However, a significant portion of suffer from the trade-off between sensitivity range. Moreover, current generally rely on rigid metallic electrode, severely deteriorating their long-term durability. Herein, fully flexible sensor coupling polyurethane (PU) based electrode active sensing element is proposed to circumvent aforementioned problems. By rationally regulating double-permeable conductive networks within PU matrix, an elastomeric implemented, respectively. The assembled heterostructured configurations enable impressive up 7.023 kPa–1, broad detection (up 420 kPa), ultralow limit (0.1 Pa), extraordinary operation stability over 80000 cyclic pressings along fast response/relaxation times (60 ms/80 ms). Additionally, capable both real-time physiological signals mimicking keyboards, implying its viability as high-performance sensor.

Language: Английский

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Self-healing and reprocessable biobased non-isocyanate polyurethane elastomer with dual dynamic covalent adaptive network for flexible strain sensor

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152876 - 152876

Published: June 5, 2024

Language: Английский

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Conductive Cross-Linkable PDMS-MXene Nanosheet Networks on Polyurethane Sponges as Robust Superhydrophobic Sensors for Human Motion Detection

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(2), P. 2164 - 2175

Published: Jan. 10, 2024

Wearable piezoresistive sensors have aroused considerable attention for their huge potential in emerging applications such as healthcare monitoring and intelligent electronics. However, the fabrication of that combine excellent sensing performance with outstanding working reliability watery environments still remains challenging. Herein, a superhydrophobic polyurethane (PU) sponge was proposed sensor through synthesis d-asparagine-modified MXene nanosheets (MXene-NH2) coating conductive cross-linkable layer constructed by dihydroxyl-terminated poly(dimethylsiloxane) (PDMS(OH)) MXene-NH2 nanosheets. The microscale skeleton nanoscale PDMS-MXene nanosheet wrinkles formed hierarchically rough structure support superhydrophobicity water contact angle 160°. Benefiting from chemically network strong adhesion coating, obtained PDMS-MXene@PU exhibited robust repellency angles (WCAs) larger than 150° after enduring chemical physical damages. Owing to synergistic effect production microcrack junctions separation between backbones, successfully applied full-scale human motions (e.g., blowing, facial expression, finger knee bending, etc.) performances gauge factor reaching −1.9. findings conceivably stand out methodology fabricate desirable property innovative broad even under special conditions.

Language: Английский

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Bioinspired Low Hysteresis Flexible Pressure Sensor Using Nanocomposites of Multiwalled Carbon Nanotubes, Silicone Rubber, and Carbon Nanofiber for Human–Computer Interaction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(13), P. 15626 - 15639

Published: June 28, 2024

The development and utilization of flexible piezoresistive sensors based on bionic nanomaterials have garnered considerable attention due to their broad potential in various domains. However, the key enhanced performance lies incorporating microstructures conductive coatings, which maximize initial resistance minimize upon pressure application, thereby amplifying change signal. In this study, we draw inspiration from microconvex structure observed skin crocodiles propose a bionic-structured sensor. sensor is fabricated using nanocomposites comprising multiwalled carbon nanotubes, silicone rubber, nanofiber conjunction with three-dimensional (3D)-printed structural mold. Sensor similar sandwich three layers: substrate layer, sensing an interdigital electrode layer. Our exhibits improved pressure-sensing capabilities, characterized by rapid response recovery times (25 ms), wide detection range (0–80 kPa), minimal hysteresis (2.44%), high sensitivity (0.4311 kPa–1 within 0–10 kPa range), fine stability (withstanding 6000 cycles under varying pressures). Notably, has efficient ability, long-term stability, good waterproofing properties, expanding its applications human–computer interaction, motion monitoring, intelligent robotics, underwater rescue operations.

Language: Английский

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Superhydrophobic and flame-retardant chitosan/ammonium polyphosphate/montmorillonite aerogel-based piezoresistive pressure sensor for human motion detection

Sensors and Actuators A Physical, Journal Year: 2024, Volume and Issue: 369, P. 115135 - 115135

Published: Feb. 6, 2024

Language: Английский

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