Underwater Communication and Optical Camouflage Ionogels

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(24)

Published: May 6, 2021

Abstract Marine animals, such as leptocephalus and jellyfish, can sense external stimuli achieve optical camouflage in the aquatic environment. Fabricating an intelligent soft sensor that mimic capabilities of transparent marine animals function underwater enable transformative applications various novel fields. However, previously reported sensors struggle to meet requirements adhesion, self‐healing ability, transparency, stable conductivity Herein, high‐performance ionogels by virtue ion–dipole ion–ion interactions between fluorine‐rich poly(ionic liquid) ionic liquid are designed. The hydrophobic dynamic viscoelastic networks provide excellent properties for ionogels, including adjustable mechanical properties, adhesiveness, conductivity, 3D printability. A mechanically compliant visually invisible based on ionogel is developed. This camouflage, human‐body‐motion detection, barrier‐free communication contactless sensing mechanism changing electron transfer pathway proposed. Several interesting functions, detection water environment changes, recognition objects, delivery information, even identification human standing posture be realized. Importantly, avoid fatigue physical damage process.

Language: Английский

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Evolution of self-healing elastomers, from extrinsic to combined intrinsic mechanisms: a review

Materials Horizons, Journal Year: 2020, Volume and Issue: 7(11), P. 2882 - 2902

Published: Jan. 1, 2020

The evolution of self-healing polymers has resulted in a myriad healing designs that have given way to complex systems capable supporting multiple cycles, among other features. This progression enables us propose the implementation timeline classifies generations based on mechanism, and correlated with historical development. first generation employed encapsulation external agents; second one, intrinsic mechanisms, applied reversible chemistries; third was inspired by natural examples such as plants human skin, which agent is embedded vascular networks. Despite great efforts and, few exceptions, high efficiency mechanical performance are not common. To improve this situation, combination different mechanisms currently emerging, giving birth fourth materials. article, focused elastomers, provides rigorous overview new generation, covalent bonds non-covalent interactions an optimal balance between repairability. concept leads materials real commercial potential functional applications, coatings, sensors, actuators, controlled release drugs, seals, gaskets, hoses, even high-performance applications tires railway components.

Language: Английский

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Intrinsically Self-Healing Polymers: From Mechanistic Insight to Current Challenges

Chemical Reviews, Journal Year: 2022, Volume and Issue: 123(2), P. 701 - 735

Published: Dec. 28, 2022

Self-healing materials open new prospects for more sustainable technologies with improved material performance and devices' longevity. We present an overview of the recent developments in field intrinsically self-healing polymers, broad class based mostly on polymers dynamic covalent noncovalent bonds. describe current models mechanisms discuss several examples systems different types bonds, from various hydrogen bonds to The advances indicate that most intriguing results are obtained have combined These demonstrate high toughness along a relatively fast rate. There is clear trade-off relationship between rate mechanical modulus materials, we propose design principles toward surpassing this trade-off. also applications summarize challenges field. This review intends provide guidance intrinsic required properties.

Language: Английский

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Conductance-stable liquid metal sheath-core microfibers for stretchy smart fabrics and self-powered sensing

Science Advances, Journal Year: 2021, Volume and Issue: 7(22)

Published: May 28, 2021

Coaxial wet-spinning is used to fabricate stretchable liquid metal sheath-core microfibers with consistently high conductance.

Language: Английский

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Multiple H‐Bonding Chain Extender‐Based Ultrastiff Thermoplastic Polyurethanes with Autonomous Self‐Healability, Solvent‐Free Adhesiveness, and AIE Fluorescence

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(4)

Published: Oct. 9, 2020

Abstract Developing an autonomous room temperature self‐healing supramolecular polyurethane (PU) with toughness and stiffness remains a great challenge. Herein, novel concept that utilizes T‐shaped chain extender double amide hydrogen bonds in side to extend PU prepolymers construct highly stiff tough integrated functions is reported. Mobile side‐chain H‐bonds afford large flexibility modulate the of PUs ranging from elastomer (105.87 MPa Young's modulus, 27 kJ m −2 tearing energy), solvent‐free hot‐melt adhesive, coating. The dynamic multiple self‐healability at (25 ° C). Due rapid reconstruction bonds, this adhesive demonstrates high adhesion strength, fast curing, reusability, long‐term adhesion, excellent low‐temperature resistance. Intriguingly, emits intrinsic blue fluorescence presumably owing aggregation‐induced emission tertiary amine domains induced by H‐bonds. explored as counterfeit ink coated on predesigned pattern, which visible‐light invisible UV‐light visible. This work represents universal facile approach fabricate supertough tailorable extension H‐bonding extenders.

Language: Английский

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Wearable Soft Technologies for Haptic Sensing and Feedback

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(39)

Published: Dec. 31, 2020

Abstract Virtual reality (VR) and augmented (AR) systems have garnered recent widespread attention due to increased accessibility, functionality, affordability. These sense user inputs typically provide haptic, audio, visual feedback blend interactive virtual environments with the real world for an enhanced or simulated experience. With applications ranging from immersive entertainment, teleoperation, physical therapy, further development of this technology has potential impact across multiple disciplines. However, VR/AR devices still face critical challenges that hinder integration into everyday life additional applications; namely, rigid cumbersome form factor current is incompatible dynamic movements pliable limbs human body. Recent advancements in field soft materials are uniquely suited solutions challenge. Devices fabricated flexible elastic bio‐compatible significantly greater compatibility body could lead a more natural This review reports state‐of‐the‐art experimental studies wearable sensing haptic applications, explores emerging technologies on‐body devices, identifies future opportunities toward seamless world.

Language: Английский

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Ultra‐Stretchable and Fast Self‐Healing Ionic Hydrogel in Cryogenic Environments for Artificial Nerve Fiber

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(16)

Published: Feb. 1, 2022

Self-healing materials behave with irreplaceable advantages in biomimetic intelligent robots (BIR) for avoiding or reducing safety hazards and economic losses from accidental damage during service. However, the self-healing ability is unreservedly lost even becomes rigid fragile cryogenic environment where BIR are precisely needed. Here, authors report a versatile ionic hydrogel fast ability, ultra-stretchability, stable conductivity, at -80 °C. The systematically optimized to improve hydrogen-bonded network nanostructure, coordinated achieving quick within 10 min, large deformation tolerance of over 7000%, superior conductivity 11.76 S cm-1 anti-freezing which difficult obtain simultaneously. Such provides new opportunities artificial electronic devices harsh environments. As prospective application, they fabricate an nerve fiber by mimicking structure functions myelinated axon, exhibiting property potential-gated signal transmission. This integrated into robot demonstrating real-time high fidelity throughput information interaction under big temperature. bionic device will bring pioneering open broad application scenario extreme conditions.

Language: Английский

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The new generation of soft and wearable electronics for health monitoring in varying environment: From normal to extreme conditions

Materials Today, Journal Year: 2020, Volume and Issue: 41, P. 219 - 242

Published: Nov. 5, 2020

Language: Английский

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Molecular engineering of a colorless, extremely tough, superiorly self-recoverable, and healable poly(urethane–urea) elastomer for impact-resistant applications

Materials Horizons, Journal Year: 2021, Volume and Issue: 8(8), P. 2238 - 2250

Published: Jan. 1, 2021

Molecular engineering of a microphase separated structure to convert weak, soft and self-healing polymer strong, tough, resilient, healable poly(urethane–urea) elastomer, which is in great demand for transparent protection engineering.

Language: Английский

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Self-Healing, Wet-Adhesion silk fibroin conductive hydrogel as a wearable strain sensor for underwater applications

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 446, P. 136931 - 136931

Published: May 11, 2022

Language: Английский

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