Facile fabrication of biomimetic and conductive hydrogels with robust mechanical properties and 3D printability for wearable strain sensors in wireless human-machine interfaces

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161112 - 161112

Published: Feb. 1, 2025

Language: Английский

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Fully Stretchable and Self-Healing Graphene-Hydrogel E-Skin with Temperature-Strain Self-Calibration

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

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A Novel Smart Hydrogel Strain Sensor for Efficient and Quantitative Detection of Blood Potassium Concentration with a Drop of Serum

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

Published: March 27, 2025

Abstract Quantitative detection of potassium ion (K + ) concentration in serum is great significance for clinical diagnosis and management. Although various methods are developed quantitative K concentration, the existed techniques often fall short realization rapid with small volume sample. Here, a novel smart hydrogel strain sensor that combines poly( N ‐isopropylacrylamide‐ co ‐benzo‐15‐crown‐5‐acrylamide) (PNB) resistance gauge efficient by converting amplifying biochemical signals into easily measurable variations. By rationally regulating PNB hydrogels crosslinked Laponite XLG nanosheets, sensors can be rapidly achieved 2 min. Because sensitive transformation enables measurement extremely slight deformation hydrogels, only one drop 16 µL required to achieve blood sensors. The exhibit exceptional interference repeated performances. proposed strategy not offers method concentrations, but also opens up new window developing applications.

Language: Английский

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Scalable Fabrication of Uniform Fast‐Response Humidity Field Sensing Array for Respiration Recognition and Contactless Human‐Machine Interaction

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

Published: April 30, 2025

Abstract In the wake of COVID‐19 pandemic, there is an increased demand for humidity sensors that can accurately detect targets without direct contact, driving advancements in contactless human‐machine interaction (HMI) and non‐invasive medical diagnostics. However, it difficult traditional individual to acquire field information reliable HMI. Here, ionogel film‐based flexible fast‐response sensing array developed via a scalable, efficient, modified spin‐coating‐based fabrication strategy accurate detection distribution. By optimizing structure constitution hydrophobic films, display ultrafast response recovery time (0.65/0.85 s), broad range (11‐98% RH), long‐term stability (120 days), excellent repeatability, flexibility, environmental tolerances. Thanks one‐time scalable fabrication, units exhibit superior uniformity, as device‐to‐device deviation reduced one‐ninth compared multi‐batch methods. With aid machine learning algorithms, this realizes not only identification various subtle breath abnormalities (e.g., oral breathing, apnea, left right nasal congestions) by conformally attaching wearable masks, but also precise HMI applications anti‐interference gesture recognition wireless control intelligent executive terminals).

Language: Английский

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Motion‐Interference Free and Self‐Compensated Multi‐Receptor Skin with all Gel for Sensory Enhancement

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

Published: May 5, 2025

Abstract Stretchable multimodal electronic skin (e‐skin) has attracted intensive research interest but faces great challenges related to strain interference, crosstalk issues, and integration of multiple sensitive materials. Herein, a stretchable strain‐isolated (SSIM) e‐skin capable concurrently sensitively monitoring temperature, humidity, UV light, oxygen, while also possessing self‐compensation capability is developed. The SSIM sensing platform created by chemically anchoring polyethylene terephthalate onto polydimethylsiloxane through silane treatment form island‐bridge structures. This method effectively isolates improves interfacial adhesion, achieving state‐of‐the‐art low interference 0.2% an adhesion energy exceeding 300 J m − 2 (13.4 times that the untreated material), ensuring e‐skin's stable operation even under dynamic stretching. To mitigate fabrication complexity, single hydrogel film employed facilitate self‐compensating various mechanisms physical isolations. can simultaneously monitor several environmental physiological signals with minimized without from body movements. It enables remote respiration wireless circuitry, highlighting its substantial potential in health monitoring, medical diagnostics, neurorehabilitation.

Language: Английский

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Polyacrylamide–Gelatin–MXene Composite Hydrogels with Interpenetrating Network Structures for Human Movement Monitoring

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Hydrogel materials containing gelatin can improve the biocompatibility and biodegradability of sensing materials, so they be widely used in flexible sensors, health monitoring, smart electronic devices. In this paper, using as a biomass-based material, interpenetrating network structure formed between polyacrylamide could not only strong stretchability flexibility hydrogel but also provide more binding sites for conductive materials. Then, polyacrylamide–gelatin MXene (PGMH) sensor with excellent performance tensile strength was prepared by introducing into structure. addition to enhancing mechanical properties hydrogel, electrical conductivity are effectively improved wearable device; breathability material ensure its adequate wear safety comfort. Importantly, feedstock gives it stability comfort use. The designed has good wide applicability great application potential next generation degradable

Language: Английский

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Mechanically robust polyacrylamide/gelatin ionic hydrogels reinforced by sodium alginate for wearable device applications

Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(3)

Published: April 21, 2025

Language: Английский

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MXene-Enhanced Laser-Induced Graphene Flexible Sensor with Rapid Response for Monitoring Pilots’ Body Motion

Micromachines, Journal Year: 2025, Volume and Issue: 16(5), P. 513 - 513

Published: April 27, 2025

Flexible wearable strain sensors demonstrate promising application prospects in health monitoring, human-machine interaction, motion tracking, and the detection of human physiological signals. Although laser-induced graphene (LIG) materials have been extensively utilized these scenarios, traditional types LIG are constrained by intrinsic limitations, including discontinuous conductive networks electromechanical responsive hysteresis. These limitations hinder their applications micro-strain scenarios. Consequently, enhancing performance LIG-based has become a crucial priority. To address this challenge, we developed novel MXene/LIG composite featuring optimized interfacial coupling effects through systematic enhancement LIG. The flexible sensor fabricated using exhibits exceptional performance, an ultra-low sheet resistance 14.1 Ω, high sensitivity 20.7, limit 0.05%, rapid response time approximately 65 ms. improvements significantly enhance responsiveness sensitivity. Furthermore, remarkable stability under varying tensile strains, particularly showing outstanding repeatability across 2500 cyclic tests. Notably, when applied to pilot monitoring MXene/LIG-based demonstrates robust capability detecting body movement signals such as micro-expressions joint movements. This establishes highly effective technological solution for real-time pilots’ states during operational

Language: Английский

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Rigid-flexible synergy dual-gradient microwrinkled strain sensor for machine learning-assisted wearable technology

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163818 - 163818

Published: May 1, 2025

Language: Английский

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Preparation of Active On-Demand Antibacterial Hydrogel Epidermis Electrodes Based on Flora Balance Strategy for Intelligent Prostheses

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: May 20, 2025

Hydrogel epidermis electrodes have demonstrated remarkable potential for stable electrophysiological signal acquisition in the field of intelligent prostheses. However, current hydrogel face challenges providing on-demand antibacterial effects due to dynamic skin conditions, such as sweating, which may induce inflammation, thus limiting their practical applications. Herein, an active electrode is prepared by encapsulating Staphylococcus epidermidis (S. epidermidis) into based on strategy flora balance. The encapsulated S. metabolizes nutrients from sweat produce substances, achieving 82% inhibition rate against aureus over a 24-h period. With properties, low interfacial impedance, and strong adhesion, enables various high-quality signals with signal-to-noise ratio 22.2 dB after 12 h attachment, much higher than that commercial electrodes. When combined machine learning models decode electromyographic signals, system achieves high gesture recognition accuracy 95%. Furthermore, enabled facilitates real-time wireless control robotic hands, robust technical platform prosthetic

Language: Английский

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