In-situ cured gel polymer/ecoflex hierarchical structure-based stretchable and robust TENG for intelligent touch perception and biometric recognition

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156650 - 156650

Published: Oct. 11, 2024

Language: Английский

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Engineering of Flexible–Rigid Binary Complementary Network toward Mechanically Robust Elastomers Simultaneously Integrating Extreme Low-Temperature and High-Temperature Resistance

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

Published: Jan. 11, 2025

There is a significant need for elastomers that retain their elastic characteristics and mechanical robustness at temperatures ranging from extremely low to high. However, low- high-temperature resistances are mutually exclusive. Here, mechanically robust elastomer integrates low-temperature resistance fabricated using multiblock polymer of polybutadiene (PB)/polyimide (PI). The exhibits an ultralow glass transition temperature −82 °C retains its −60 90 °C. has flexible–rigid binary complementary network, in which the PI segments with highly conjugated structure aromaticity aggregate form phase-separated nanodomains cross-link flexible PB segments. Serving as nanofillers, strengthen significantly enhance resistance. Furthermore, prevent crystallization thus ensure high flexibility temperatures. properties under cold, normal, elevated exceed those general-purpose rubbers previously reported elastomers. Moreover, stable acidic basic aqueous solutions. This holds particular promise tire tread compound because it provides excellent winter traction rolling

Language: Английский

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Bio‐Based Elastomers: Design, Properties, and Biomedical Applications

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

Published: Jan. 13, 2025

Abstract To reduce carbon footprint and human dependence on fossil fuels, the field of bio‐based polymers has undergone explosive growth in recent years. Among them, elastomers have gained tremendous attention for their inherent softness, high strain, resilience. In this review, progress representative derived from molecular building blocks biopolymers are recapitulated, with an emphasis design, synthesis approaches, mechanical performance. The performance‐advantaged properties elastomers, including immune modulation, biocompatibility, biodegradability also explored. Furthermore, biomedical applications wound dressing, cardiovascular, nerve repair, bone biosensors exemplified. Lastly, challenges outlooks development discussed. This review aims to offer readers valuable insights into potential as viable alternatives petroleum‐based counterparts, supporting transition toward a more sustainable future.

Language: Английский

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Self-Powered Electrochemical Protection for Marine Corrosion and Fouling Control: Principles, Advances, and Prospects

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110676 - 110676

Published: Jan. 1, 2025

Language: Английский

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Autonomous Self‐Healing Magnetoelectric I‐Skin from Self‐Bonded Deep Eutectic Polymer

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Next‐generation ionic skin (i‐skin) should be self‐healing and self‐powered, promoting its development toward lightweight, miniaturization, compact, portable designs. Previously reported self‐powered i‐skin mostly either lack the ability to self‐repair damaged parts or only have capabilities some components, falling short of achieving complete device self‐healability. In this work, a self‐bonding strategy is presented obtain an all‐polymerizable deep eutectic solvent (PDES) magnetoelectric (MIS) that simultaneously achieves self‐powering full‐device autonomous The three‐layered MIS can easily restore mechanical electrochemical performance at level without requiring any external stimulus. developed configured into various 3D architectures with highly compatible magnetic conductive offering promising potential for advancement embodied energy technologies. present work provides versatile user‐friendly platform producing wide range intrinsic multi‐layered devices made from soft materials, applications extending beyond human‐machine interfaces artificial intelligence.

Language: Английский

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Synthesizing lignin-based gelators to prepare oleogels used as green and fossil-free greases

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: 305, P. 141074 - 141074

Published: Feb. 19, 2025

Traditional lubricating greases are mainly derived from petroleum, which poses major environmental challenges due to their non-biodegradability and pollution issues. This study attempts synthesize lignin-based green thickeners explore potential for developing fossil-free greases. A gelator was successfully synthesized by reacting malic acid with lignin epoxidized soybean oil, in participated both the esterification reaction ring-opening of epoxy group. used as thickener prepare several different oils, e.g., castor rapeseed PAO 15, paraffin oil. It found that combining this oil can be preparing greases, while it does not work other oils. Rheological studied showed 35 % gelator-castor grease exhibited strong gel-like behaviour, storage modulus (G', 400 Pa) exceeding loss (G", 40 shear-thinning viscosity reducing 106 104 mPa·s under stress. Comprehensive tribological studies on developed show gelators significantly improve lubricant performance (about 20 lower friction around wear a contact pressure 2.72 GPa, reciprocating speed 0.1 m/s, 80 °C). XPS analysis further revealed ability form protective film metal surfaces. demonstrates great provides new ideas high-performance, green,

Language: Английский

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Self-Healing, Degradable, and Biobased Polyurethane Elastomer for High-Performance Piezoresistive Pressure Sensors with a Hump-like Microstructure

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

Published: Feb. 19, 2025

Flexible sensors are widely applied in the fields of electronic skins and wearable devices, yet it is still a big challenge to effectively prolong lifespan damaged reduce environmental pollution caused by discarded after updating upgrading. Herein, we proposed self-healing, degradable, biobased polyurethane elastomer for high-performance flexible pressure sensors. The synthesized using fatty diamine as chain extender possessed high tensile strength 13.25 MPa an elongation at break 830%, self-healing efficiency reached up 109.2%. Additionally, could be fully degraded within 7 days 1 mol L-1 NaOH solution with assistance ethanol. elastomer-based sensor hump-like microstructure was fabricated reduced graphene oxide conductive material via simple template method. showed sensitivity 9.448 kPa-1, large sensing range 0-300 kPa, short response/recovery time 40/80 ms, good stability 14,000 cycles. Moreover, utilized monitor different human motions, including muscle contraction, joint bending, swallowing, voice recognition, pulse beat. Importantly, even being severely damaged, able recover its function detecting motions. findings this research provide strategy sustainable development environmentally friendly functional elastomers

Language: Английский

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Tannic Acid Modified Epoxidized Natural Rubber Based High Performing Triboelectric Nanogenerator

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

Published: Feb. 19, 2025

Abstract Considering today's environmental concerns, the development of triboelectric nanogenerator (TENG) is gaining immense interest as a green energy harvesting technology. However, most materials leveraged in TENG construction are based on non‐renewable resources. Therefore, developing bio‐based composite with high performance for application extremely desirable. This study uses Tannic acid (TA), naturally occurring polyphenolic compound, reactive bio‐filler elastomer Epoxidized natural rubber (ENR‐50). bio‐composite utilized tribo‐positive pair construction, which resulted very output voltage 751 V (at 9 Hz) and 568 5 Hz). The maximum obtained power density recorded at Hz 37 W m −2 1 MΩ external load resistance an average 20 10–100 MΩ. excellent results from electron‐donating ability TA. It many‐fold higher terms than recently reported all bio‐composites. Density Functional Theory to probe contact electrification process. result correlates surface energy, dielectric, dynamic mechanical properties, morphologies (roughness). Notably that such can be promising material next‐generation

Language: Английский

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Silk Protein-Based Triboelectric Nanogenerators for Energy Harvesting and Self-Powered Sensing

Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116449 - 116449

Published: March 1, 2025

Language: Английский

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3D Printing Flexible Wearable Electronics with Diversified Environmentally Adaptive for Biomechanical Energy Harvesting and Personal Electromagnetic Safety

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

Published: April 7, 2025

Abstract The exploitation of wearable electronic devices with diversified environmentally adaptivity, advanced additive manufacturing, efficient microwaves absorption, and self‐powered sensing represents a pivotal strategic in promoting Artificial‐Intelligence personal electromagnetic safety. However, achieving robust multifunctional integration single flexible device is still an unprecedented challenge. Herein, the multidimensional multiphase nanofiller hierarchical structures tailored defects, comb/bottlebrush polysiloxane multifluorination multireversible bond, featuring dynamic interface interaction, are designeded. Subsequently, dual‐mode intelligent sensor assembled based on direct‐ink‐writing electrostatic‐spraying technology. 3D‐printed triboelectric nanogenerator (TENG) exhibited excellent output ( V oc = 185.4 V, I sc 1576.2nA, power density 729.8mW m −2 ) durability virtue multi‐scale roughness surface, interfacial polarization, charge trapping, storage transmission capacity. Accordingly, fabric‐based TENG designed for demonstrating human activity monitoring biomechanical energy harvesting. Benefiting from optimized impedance matching multiple magnetic‐dielectric coupling, exceptional protection behavior RL min ‐64.81 dB, EAB 5.1 GHz). Remarkably, synergistic properties superhydrophobic, oleophobic, self‐healing significantly improved reliability life‐span. This work presents as proof‐of‐concept extensive design‐freedom, pioneering sensing, safety, which will contribute to development high‐quality human‐machine healthcare, skin.

Language: Английский

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