Hydrogel‐Based Flexible Electronics

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(14)

Published: Aug. 29, 2022

Abstract Flexible electronics is an emerging field of research involving multiple disciplines, which include but not limited to physics, chemistry, materials science, electronic engineering, and biology. However, the broad applications flexible are still restricted due several limitations, including high Young's modulus, poor biocompatibility, responsiveness. Innovative aiming for overcoming these drawbacks boost its practical application highly desirable. Hydrogel a class 3D crosslinked hydrated polymer networks, exceptional material properties render it as promising candidate next generation electronics. Here, latest methods synthesizing advanced functional hydrogels state‐of‐art hydrogel‐based in various fields reviewed. More importantly, correlation between hydrogel device performance discussed here, have better understanding development by using environmentally responsive hydrogels. Last, perspectives on current challenges future directions multifunctional provided.

Language: Английский

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Skin-like mechanoresponsive self-healing ionic elastomer from supramolecular zwitterionic network

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: July 2, 2021

Abstract Stretchable ionic skins are intriguing in mimicking the versatile sensations of natural skins. However, for their applications advanced electronics, good elastic recovery, self-healing, and more importantly, skin-like nonlinear mechanoresponse (strain-stiffening) essential but can be rarely met one material. Here we demonstrate a robust proton-conductive skin design via introducing an entropy-driven supramolecular zwitterionic reorganizable network to hydrogen-bonded polycarboxylic acid network. The allows two dynamic networks with distinct interacting strength sequentially debond stretch, conflict among elasticity, strain-stiffening thus defeated. representative polyacrylic acid/betaine elastomer exhibits high stretchability (1600% elongation), immense (24-fold modulus enhancement), ~100% excellent elasticity (97.9 ± 1.1% recovery ratio, <14% hysteresis), transparency (99.7 0.1%), moisture-preserving, anti-freezing (elastic at −40 °C), water reprocessibility, as well easy-to-peel adhesion. combined advantages make present very promising wearable iontronic sensors human-machine interfacing.

Language: Английский

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Green Tea Derivative Driven Smart Hydrogels with Desired Functions for Chronic Diabetic Wound Treatment

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(18)

Published: Feb. 1, 2021

Abstract Current treatments for chronic diabetic wounds remain unsatisfactory due to the lack of ideal wound dressings that can integrate matching mechanical strength, fast self‐healability, facile dressing change, and multiple therapeutic effects into one system. In this work, benefiting from catechol groups effect epigallocatechin‐3‐gallate (EGCG, green tea derivative), a smart hydrogel be conveniently obtained through copolymerization complex formed by EGCG 3‐acrylamido phenylboronic acid (APBA) (the formation boronate ester bond) acrylamide. The resulting features adequate properties, self‐healing capability, tissue adhesiveness. Otherwise, substantial release not only realize anti‐oxidation, antibacterial, anti‐inflammatory proangiogenic effect, modulation macrophage polarization accelerate healing, but also facilitate easy change. This advanced provides effective way management may extended therapy other complicated healings.

Language: Английский

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Zwitterionic Biomaterials

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(23), P. 17073 - 17154

Published: Oct. 6, 2022

The term "zwitterionic polymers" refers to polymers that bear a pair of oppositely charged groups in their repeating units. When these are equally distributed at the molecular level, molecules exhibit an overall neutral charge with strong hydration effect via ionic solvation. constitutes foundation series exceptional properties zwitterionic materials, including resistance protein adsorption, lubrication interfaces, promotion stabilities, antifreezing solutions, etc. As result, materials have drawn great attention biomedical and engineering applications recent years. In this review, we give comprehensive panoramic overview covering fundamentals nonfouling behaviors, different types surfaces polymers, applications.

Language: Английский

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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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Recent advances in wet adhesives: Adhesion mechanism, design principle and applications

Progress in Polymer Science, Journal Year: 2021, Volume and Issue: 116, P. 101388 - 101388

Published: March 10, 2021

Language: Английский

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Healable, Degradable, and Conductive MXene Nanocomposite Hydrogel for Multifunctional Epidermal Sensors

ACS Nano, Journal Year: 2021, Volume and Issue: 15(4), P. 7765 - 7773

Published: March 26, 2021

Conductive hydrogels have emerged as promising material candidates for epidermal sensors due to their similarity biological tissues, good wearability, and high accuracy of information acquisition. However, it is difficult simultaneously achieve conductive hydrogel-based with reliable healability long-term usage, robust mechanical property, environmental degradability decreased electronic waste, sensing capability the physiological stimuli electrophysiological signals. Herein, we propose synthesis strategy a multifunctional sensor based on highly stretchable, self-healing, degradable, biocompatible nanocomposite hydrogel, which fabricated from conformal coating MXene (Ti3C2Tx) network by hydrogel polymer networks involving poly(acrylic acid) amorphous calcium carbonate. The can be employed sensitively detect human motions fast response time (20 ms) serve skins wirelessly monitoring signals (such electromyogram electrocardiogram signals). Meanwhile, could degraded in phosphate buffered saline solution, not cause any pollution environment. This line research work sheds light fabrication healable, signal-sensitive potential applications human–machine interactions, healthy diagnosis, smart robot prosthesis devices.

Language: Английский

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Development of Conductive Hydrogels for Fabricating Flexible Strain Sensors

Small, Journal Year: 2021, Volume and Issue: 18(5)

Published: Oct. 17, 2021

Abstract Conductive hydrogels can be prepared by incorporating various conductive materials into polymeric network hydrogels. In recent years, have been developed and applied in the field of strain sensors owing to their unique properties, such as electrical conductivity, mechanical self‐healing, anti‐freezing properties. These remarkable properties allow hydrogel‐based show excellent performance for identifying external stimuli detecting human body movement, even at subzero temperatures. This review summarizes application fabrication working different modes. Finally, a brief prospectus development future is provided.

Language: Английский

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Advanced hydrogels for the repair of cartilage defects and regeneration

Bioactive Materials, Journal Year: 2020, Volume and Issue: 6(4), P. 998 - 1011

Published: Oct. 10, 2020

Cartilage defects are one of the most common symptoms osteoarthritis (OA), a degenerative disease that affects millions people world-wide and places significant socio-economic burden on society. Hydrogels, which class biomaterials elastic, display smooth surfaces while exhibiting high water content, promising candidates for cartilage regeneration. In recent years, various kinds hydrogels have been developed applied repair in vitro or vivo, some hopeful to enter clinical trials. this review, research findings developments summarized. We discuss principle regeneration, outline requirements be fulfilled deployment medical applications. also highlight development advanced with tailored properties different meet tissue engineering precision medicine.

Language: Английский

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From Diagnosis to Treatment: Recent Advances in Patient-Friendly Biosensors and Implantable Devices

ACS Nano, Journal Year: 2021, Volume and Issue: 15(2), P. 1960 - 2004

Published: Feb. 3, 2021

Patient-friendly medical diagnostics and treatments have been receiving a great deal of interest due to their rapid cost-effective health care applications with minimized risk infection, which has the potential replace conventional hospital-based procedures. In particular, integration recently developed materials into devices allows development point-of-care (POC) sensing platforms implantable special functionalities. this review, recent advances in biosensors for patient-friendly diagnosis treatment are discussed. Comprehensive analysis portable wearable biosensing monitoring disease is provided, including topics such as selection, device structure integration, biomarker detection strategies. Moreover, specific challenges related each biological fluid biosensor-based POC presented. Also, devices, wireless communication strategies, Furthermore, various surgical approaches reviewed, minimally invasive insertion mounting, vivo electrical optical modulations, post-operation monitoring. Finally, future perspectives toward provided.

Language: Английский

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