A stretchable, environmentally tolerant, and photoactive liquid metal/MXene hydrogel for high performance temperature monitoring, human motion detection and self-powered application

Nano Energy, Journal Year: 2023, Volume and Issue: 117, P. 108875 - 108875

Published: Sept. 6, 2023

Language: Английский

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A Semi‐Interpenetrating Poly(Ionic Liquid) Network‐Driven Low Hysteresis and Transparent Hydrogel as a Self‐Powered Multifunctional Sensor

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: May 6, 2024

Abstract Conductive hydrogels are gaining significant attention as promising candidates for the fabrication materials flexible electronics. Nevertheless, improving tensile properties, hysteresis, durability, adhesion, and electrochemical properties of these remains challenging. This work reports development a novel semi‐interpenetrating network poly(ionic liquid) hydrogel named PATV, via in situ polymerization acrylamide, N ‐[Tris(hydroxymethyl)methyl] 1‐vinyl‐3‐butylimidazolium tetrafluoroborate. The density functional theory calculations reveal that acts physical cross–linking points to construct hydrogen‐bond networks. Furthermore, networks dissipate energy efficiently quickly, thus stress concentration hysteresis avoided. prepared has low (9%), high (900%), fast response (180 ms), sensitivity (gauge factor = 10.4, pressure 0.14 kPa −1 ), wide sensing range (tensile range: 1–600%, compression 0.1–20 kPa). A multifunctional sensor designed based on enables real‐time, rapid, stable response‐ability detection human movement, facial expression recognition, pronunciation, pulse, handwriting, Morse code encryption. assembled triboelectric nanogenerator displays an excellent harvesting capability, highlighting its potential application self‐powered wearable electronic devices.

Language: Английский

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Surface Modification of Super Arborized Silica for Flexible and Wearable Ultrafast‐Response Strain Sensors with Low Hysteresis

Advanced Science, Journal Year: 2023, Volume and Issue: 10(25)

Published: June 28, 2023

Conductive hydrogels exhibit high potential in the fields of wearable sensors, healthcare monitoring, and e-skins. However, it remains a huge challenge to integrate elasticity, low hysteresis, excellent stretch-ability physical crosslinking hydrogels. This study reports synthesis polyacrylamide (PAM)-3-(trimethoxysilyl) propyl methacrylate-grafted super arborized silica nanoparticle (TSASN)-lithium chloride (LiCl) hydrogel sensors with electrical conductivity. The introduction TSASN enhances mechanical strength reversible resilience PAM-TSASN-LiCl by chain entanglement interfacial chemical bonding, provides stress-transfer centers for external-force diffusion. These show outstanding (a tensile stress 80-120 kPa, elongation at break 900-1400%, dissipated energy 0.8-9.6 kJ m

Language: Английский

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Poly(vinyl alcohol)/polyacrylamide double‐network ionic conductive hydrogel strain sensor with high sensitivity and high elongation at break

Journal of Polymer Science, Journal Year: 2024, Volume and Issue: 62(20), P. 4599 - 4611

Published: July 19, 2024

Abstract As a soft material with biocompatibility and stimulation response, ionic conductive hydrogel‐based wearable strain sensors show great potential across wide spectrum of engineering disciplines, but their mechanical toughness is limited in practical applications. In this study, freeze‐thawing techniques were utilized to fabricate double‐network hydrogels poly(vinyl alcohol)/polyacrylamide (PVA/PAM) both covalent physical cross‐linking networks. These demonstrate excellent performance, an elongation at break 2253% tensile strength 268.2 kPa. Simultaneously, they also display high sensitivity (Gage factor, GF = 2.32 0%–200% strain), achieve rapid response time 368 ms without the addition extra fillers or ions, stable signal transmission even after multiple cycles, fast human motion detection.

Language: Английский

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Sandwich-Like Flexible Breathable Strain Sensor with Tunable Thermal Regulation Capability for Human Motion Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(8), P. 10633 - 10645

Published: Feb. 17, 2024

High-performance flexible strain sensors with synergistic and outstanding thermal regulation function are poised to make a significant impact on next-generation multifunctional sensors. However, it has long been intractable optimize the sensing performance high conductivity simultaneously. Herein, novel sandwich-like sensor advanced capability was prepared by assembling electrospun thermoplastic polyurethane (TPU) fibrous membrane, MXene layer, TPU/boron nitride nanosheet (BNNS) composite films. The as-prepared demonstrates wide working range (∼100% strain), an ultrahigh gauge factor (2080.9), satisfactory reliability. Meanwhile, benefiting from uniform dispersion promising orientation of BNNSs in TPU composites, possesses 1.5 W·m–1·K–1, guaranteeing wearer comfort. Additionally, unique structure endows stretchability, breathability, biocompatibility, tunable electromagnetic interference shielding performances. Furthermore, integrated wireless motion monitoring device based this is rationally designed. It exhibits fast response time, recognition range, ability maintain skin temperature during prolonged physical activity. These encouraging findings provide new feasible approach designing high-performance versatile broad applications wearable technology.

Language: Английский

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Mechanically Robust and Anti‐Swelling Anisotropic Conductive Hydrogel with Fluorescence for Multifunctional Sensing

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 24, 2024

Abstract The intricate muscle arrangement structure endows the biological tissues with unique mechanical properties. Inspired by that, a mechanically robust and multifunctional anisotropic Polyacrylamide/Sodium alginate/Zirconium ion/Carbon dots (PAM/SA/Zr 4+ /CDs, PSZC) hydrogel is developed through synergistic effect of mechanical‐assisted stretching, Zr metal‐coordination CDs embedding. resulting exhibited an impressive tensile strength 2.56 MPa exceptional toughness 10.10 MJ m −3 along stretching direction, attributing to oriented alignment PAM SA molecular chains induced metal‐coordination. dense network endowed PSZC excellent anti‐swelling performance, achieving swelling ratio only 1.7% after being stored in water for 30 days. presence conferred remarkable electrical conductivity 2.15 S −1 hydrogel. Furthermore, integration carbon imparted fluorescence properties, rendering it visual sensing capabilities. Overall, straightforward strategy proposed fabricating suitable underwater sensing, offering valuable insights development high‐performance sensors.

Language: Английский

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Highly stretchable, conductive, and self-adhesive starch-based hydrogel for high-performance flexible electronic devices

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: 352, P. 123220 - 123220

Published: Jan. 2, 2025

Language: Английский

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High‐Conductivity, Self‐Healing, and Adhesive Ionic Hydrogels for Health Monitoring and Human‐Machine Interactions Under Extreme Cold Conditions

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract Ionic conductive hydrogels (ICHs) are emerging as key materials for advanced human‐machine interactions and health monitoring systems due to their unique combination of flexibility, biocompatibility, electrical conductivity. However, a major challenge remains in developing ICHs that simultaneously exhibit high ionic conductivity, self‐healing, strong adhesion, particularly under extreme low‐temperature conditions. In this study, novel ICH composed sulfobetaine methacrylate, methacrylic acid, TEMPO‐oxidized cellulose nanofibers, sodium alginate, lithium chloride is presented. The hydrogel designed with hydrogen‐bonded chemically crosslinked network, achieving excellent conductivity (0.49 ± 0.05 S m −1 ), adhesion (36.73 2.28 kPa), self‐healing capacity even at −80 °C. Furthermore, the maintain functionality over 45 days, showcasing outstanding anti‐freezing properties. This material demonstrates significant potential non‐invasive, continuous monitoring, adhering conformally skin without signal crosstalk, enabling real‐time, high‐fidelity transmission cryogenic These offer transformative next generation multimodal sensors, broadening application possibilities harsh environments, including weather outer space.

Language: Английский

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Recent progress in fabrications, properties and applications of multifunctional conductive hydrogels

European Polymer Journal, Journal Year: 2024, Volume and Issue: 208, P. 112895 - 112895

Published: March 1, 2024

Language: Английский

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Self-adhesive, stretchable waterborne polyurethane-based flexible film as wearable conformal strain sensor for motion and health monitoring

Advanced Nanocomposites, Journal Year: 2024, Volume and Issue: 1(1), P. 171 - 179

Published: Jan. 1, 2024

Wearable tensile strain sensors are of great importance in both motion monitoring and next-generation, personalized health diagnostics. The accuracy, reliability stability the signals obtained from these significantly dependent on conformal contact between flexible sensor skin surface. In this study, we have developed a double-layer film as wearable by simple solution-blending method layer-by-layer spraying method. D-Sorbitol was incorporated into waterborne polyurethane (WPU) emulsion to enhance adhesion, achieving strength 7.91 N/m, disrupt hydrogen bonds WPU chains. This disruption facilitates more straightforward conformational changes chains under stress, thereby substantially enhancing mechanical flexibility film. sensing layer subsequently constructed silver microparticles, exhibiting extremely high sensitivity (gauge factor = 103.01) over 19.3% range. can effectively monitor joint motions subtle muscle movements sensors.

Language: Английский

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