Bioinspired Super‐Robust Conductive Hydrogels for Machine Learning‐Assisted Tactile Perception System

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

Published: Feb. 3, 2025

Conductive hydrogels have attracted significant attention due to exceptional flexibility, electrochemical property, and biocompatibility. However, the low mechanical strength can compromise their stability under high stress, making material susceptible fracture in complex or harsh environments. Achieving a balance between conductivity robustness remains critical challenge. In this study, super-robust conductive were designed developed with highly oriented structures densified networks, by employing techniques such as stretch-drying-induced directional assembly, salting-out, ionic crosslinking. The showed remarkable property (tensile strength: 17.13-142.1 MPa; toughness: 50 MJ m- 3), (30.1 S m-1), reliable strain sensing performance. Additionally, it applied hydrogel fabricate biomimetic electronic skin device, significantly improving signal quality device stability. By integrating 1D convolutional neural network algorithm, further real-time recognition system based on triboelectric piezoresistive collection, achieving classification accuracy of up 99.79% across eight materials. This study predicted potential high-performance for various applications flexible smart wearables, Internet Things, bioelectronics, bionic robotics.

Language: Английский

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Regulating Contact Electrification and Charge Retention Capability With Metal–Organic Frameworks in Triboelectric Nanogenerator for Self‐Powered Sewage Treatment

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

Published: Jan. 28, 2025

Abstract The harvesting of ocean wind energy for triboelectric nanogenerators (TENGs) is greatly influenced by the contact electrification (CE) capability, charge retention characteristics, and harsh marine environment. In this work, four highly water‐stable metal–organic frameworks, including MIL‐101(Cr), UiO‐66, ZIF‐8, MOF‐303, are doped into PVA/Ta layers to modulate their CE retention, resistance environments. capability compared at multiple scales electronic, atomic, molecular levels using DFT calculation. combined effect pyrazole ring ─COO─ group contributes highest tribopositivity PVA/Ta/MOF‐303. Besides, reduced HOMO–LUMO gap increased HOMO level make it easier electrons in PVA/Ta/MOF‐303 transfer. Meanwhile, MOF‐303 with high capture located deep can serve as traps reduce dissipation rate. Hence, density PVA/Ta/MOF‐303‐based TENG (PTM‐TENG) 90% RH reaches 361.43 µC m −2 . Hydrogen bonding, coordination effects, electrostatic interactions endow excellent mechanical, anti‐swelling, anti‐aging properties. Finally, PTM‐TENG assembled a self‐powered sewage treatment system, generation ·OH ·O 2 − enables realize water sterilization rate (99.99%) efficient organic pollutant degradation (>95%) within 20 min.

Language: Английский

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Preparation schemes and applications of multifunctional PVA composite hydrogels

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160946 - 160946

Published: Feb. 1, 2025

Language: Английский

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Facile synthesis of ultratough conductive gels with swelling and freezing resistance for flexible sensor applications

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 1, 2025

Abstract The application of flexible hydrogel sensors in extreme environments, such as low temperatures, underwater, or significant mechanical deformations, poses considerable challenges. Here, we present a simple one-pot method to fabricate ultra-tough, swelling- and freezing-resistant conductive organohydrogels without external freeze-resistant fillers. During gelation, by-products (C 6 H 15 NHCl, KCl) provide both conductivity antifreeze properties, thus eliminating compatibility issues dispersion challenges associated with resulting gel exhibits super toughness, tensile strength reaching 10.2 MPa stretchability up 800% the dry state. Following covalent crosslinking, demonstrates excellent anti-swelling swelling ratio only 15.4% after 24 h water immersion, while maintaining 5.8 an elongation 1000%. When fabricated into sensors, these gels display stable electrical responsiveness desired Gauge Factor (0.58–2.25), effectively detecting limb movements. Furthermore, gel’s superior resistance freezing ensures reliable signal stability under − 20 °C underwater conditions. These combined properties render promising candidate for sensing components robotic bionic applications.

Language: Английский

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Damping Supramolecular Elastomer for Steady Hypothermic Sensing

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

Published: Feb. 24, 2025

Abstract Flexible temperature sensors often use gels to achieve skin‐inspired softness, but the water evaporation and freezing of hydrogel leakage ionogel, cause unstable signal transmission inaccurate measurement at sub‐zero temperatures. Here steady hypothermic sensing is achieved by designing a supramolecular elastomer containing two types segments: liquid‐free iontronic segment transmit electrical charges prevent ion leakage, neutral with pendant chains damp vibration for stable transmission. The exhibits excellent tensile properties, adhesiveness, self‐healing, ionic conductivity A wireless system fabricated based on supermolecule elastomer, realizing accurate, steady, sensitive real‐time detection. Especially, sensor coefficient resistance (TCR) 8.87% °C −1 from −20 −15 °C, three five times higher than that most flexible sensors. There no significant difference in detected this an infrared thermal imaging camera. Such represents step toward highly accurate cold chain transportation beyond.

Language: Английский

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Covalent crosslinking modulated nanocrystallization of PVA/poly(lithium acrylate) hydrogel with Hofmeister effect for simultaneously excellent mechanical performance and ionic conductivity

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160460 - 160460

Published: Feb. 1, 2025

Language: Английский

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Skin-like Heterogeneous and Self-Healing Conductive Hydrogel toward Ultrasensitive Marine Sensing

ACS Sensors, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Flexible wearable electronic devices based on hydrophobic, conductive hydrogels have attracted widespread attention in the field of underwater sensing. However, traditional homogeneous tend to compromise their conductivity and sensing performance when achieving hydrophobicity, high complexity marine environments further reduces service life. Here, we develop a seawater-resistant hydrogel with ultrahigh sensitivity self-healing ability by introduction skin-like heterogeneous structure, consisting hydrophobic outer layer that protects against seawater internal senses. Based structure obtained through surface modification confined nitrogen-alkylation reaction, simultaneously achieves satisfying resistance (contact angle 123.2°), ionic (2.86 S m–1), excellent (GF = 6.15), harmonizing contradiction between water hydrogels. In addition, abundant hydrogen-bonding dipole–dipole interactions endow an outstanding ability, exhibiting high-efficiency behavior seawater. Underwater strain sensors constructed can be used for detecting human motion simulated real-time signal transmission, showcasing great potential as field.

Language: Английский

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Amino-ended hyperbranched polyamide-cross-linked conducting polymer hydrogels with enhanced performance for wearable electronics

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Amino-ended hyperbranched polyamide (HBPN) cross-links PVA and PEDOT:PSS to form a tough, stretchable conducting polymer hydrogel for strain sensors, enabling stable sensitive motion monitoring.

Language: Английский

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Supramolecular Zwitterionic Hydrogels for Information Encryption, Soft Electronics and Energy Storage at Icy Temperature

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

Published: March 26, 2025

Abstract Zwitterionic hydrogels have attracted intensive attentions for their exceptional hydration and anti‐fouling properties, while the exploration rational structural designs to achieve multi‐function superior anti‐freezing capability remains an ongoing mission. Herein, a new multi‐functional zwitterionic monomer (ACHPES) is designed developed from which novel are fabricated. The pyridinium‐sulfonate motif endows hydrogel with discoloration in both visible light fluorescence response pH stimulus, enabling unique multi‐channel information encryption highly sensitive Cu 2+ detection threshold of 0.64 ppm. design carbamate group fulfils high bonding capacity water, leading capability. As such, exhibit extremely low water freezing point −47.3 °C breaking elongation ≈500% at −20 °C. outstanding enables sensors electrolytes excellent operational performance temperatures. This innovative strategy offers avenue functionalization application icy temperature.

Language: Английский

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Interhalogen and the salting-out effect enable high-capacity and long-cycle Zn//I2 aqueous microbatteries

Matter, Journal Year: 2025, Volume and Issue: unknown, P. 102104 - 102104

Published: April 1, 2025

Language: Английский

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