Low‐Molecular‐Weight Supramolecular‐Polymer Double‐Network Eutectogels for Self‐Adhesive and Bidirectional Sensors

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(45)

Published: Aug. 8, 2021

Abstract Ionic conducting eutectogels have attracted enormous attention as an alternative to the conventional temperature‐intolerant hydrogels and costly ionic liquid gels in constructing flexible electronic devices. However, current prepared via cross‐linked polymer or low‐molecular‐weight gelators suffer from limited stretchability insufficient surface‐adaptive adhesion. Herein, a supramolecular network is introduced into covalent eutectogel architecture, novel supramolecular‐polymer double‐network (SP‐DN) strategy demonstrated fabricate conductive SP‐DN with high (>4000% elongation) toughness (≈800 J m −2 ), well self‐healing, self‐adhesive anti‐freezing/anti‐drying characteristics. These unique features lead successful realization of wearable strain sensors, which can conformally deform skin dynamically monitor body movements sensitivity long‐term stability over wide temperature range (−40 60 °C). Furthermore, sensors accurately detect along two opposite directions (bend up bend down), are rarely reported literature. Distinct widely explored (P‐DN) hydrogels, developed platform capable well‐regulating molecular‐scale noncovalent interactions, providing paradigm for creation smart soft materials versatile performance environmental adaptability.

Language: Английский

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Peptide-enhanced tough, resilient and adhesive eutectogels for highly reliable strain/pressure sensing under extreme conditions

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Nov. 5, 2022

Abstract Natural gels and biomimetic hydrogel materials have been able to achieve outstanding integrated mechanical properties due the gain of natural biological structures. However, nearly every structure relies on water as solvents or carriers, which limits possibility in extreme conditions, such sub-zero temperatures long-term application. Here, peptide-enhanced eutectic were synthesized by introducing α-helical “molecular spring” into deep solvent. The gel takes full advantage structure, achieving high tensile/compression, good resilience, superior fracture toughness, excellent fatigue resistance strong adhesion, while it also inherits benefits solvent solves problems volatilization freezing. This enables unprecedentedly long stable sensing human motion movement. electrical signal shows almost no drift even after 10,000 deformations for 29 hours −20 °C 80 temperature range.

Language: Английский

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Liquid‐Free, Anti‐Freezing, Solvent‐Resistant, Cellulose‐Derived Ionic Conductive Elastomer for Stretchable Wearable Electronics and Triboelectric Nanogenerators

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(46)

Published: Sept. 7, 2022

Abstract The development of flexible conductive elastomers integrating renewable feedstock, splendid mechanical property, and excellent weather resistance is major interest challenge. Here, a novel strategy reported to construct the liquid‐free cellulose‐derived ionic elastomer that successfully applied in wearable sensor triboelectric nanogenerators (TENG). In this strategy, with physical chemical dual‐crosslinking network prepared via situ polymerization polymerizable deep eutectic solvent. construction improves strength toughness more than 2 times, cellulose contributes forming dense hydrogen bond crosslinking can improve recyclability, anti‐freezing, solvent‐resistance performance. Benefiting from these features, sensors TENG for monitoring human motion, harvesting energy convert into stable electrical outputs light LEDs, charge capacitor, power electronic watch. maintains reliable sensing performance even after recycling, soaking organic solvent, or at low/high temperature. This study paves promising fabricating sustainable multifunction electronics are suitable harsh environments.

Language: Английский

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Self-Adhesive, Stretchable, Biocompatible, and Conductive Nonvolatile Eutectogels as Wearable Conformal Strain and Pressure Sensors and Biopotential Electrodes for Precise Health Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(17), P. 20735 - 20745

Published: April 26, 2021

Conductive stretchable hydrogels and ionogels consisting of ionic liquids can have interesting application as wearable strain pressure sensors bioelectrodes due to their soft nature high conductivity. However, a severe stability problem because water evaporation, whereas are not biocompatible or even toxic. Here, we demonstrate self-adhesive, stretchable, nonvolatile, eutectogels that always form conformal contact skin during body movement along with biopotential electrodes for precise health monitoring. The consist deep eutectic solvent has conductivity, waterborne polyurethane is an elastomer, tannic acid adhesive. They elongation at break 178%, conductivity 0.22 mS/cm, adhesion force 12.5 N/m skin. be used accurately monitor joint breath. piezoresistive sensitivity 284.4 kPa–1 precisely detect subtle physical movements like arterial pulses, which provide vital cardiovascular information. Moreover, the nonvolatile epidermal physiological signals, such electrocardiogram (ECG) electromyogram (EMG).

Language: Английский

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Highly stretchable, self-healing, and adhesive polymeric eutectogel enabled by hydrogen-bond networks for wearable strain sensor

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 449, P. 137878 - 137878

Published: July 2, 2022

Language: Английский

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Evolutionary Reinforcement of Polymer Networks: A Stepwise‐Enhanced Strategy for Ultrarobust Eutectogels

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(6)

Published: Nov. 8, 2023

Abstract Gel materials are appealing due to their diverse applications in biomedicine, soft electronics, sensors, and actuators. Nevertheless, the existing synthetic gels often plagued by feeble network structures inherent defects associated with solvents, which compromise mechanical load‐bearing capacity cast persistent doubts about reliability. Herein, combined attractive deep eutectic solvent (DES), a stepwise‐enhanced strategy is presented fabricate ultrarobust eutectogels. It focuses on continuous modulation optimization of polymer networks through complementary annealing exchange processes, drives progressive increase both quantity mass interconnected chains at microscopic scale, hence contributing evolutionary enhancement structure. The resultant eutectogel exhibits superb properties, including record‐breaking strength (31.8 MPa), toughness (76.0 MJ m −3 ), Young's modulus (25.6 together exceptional resistance ability tear crack propagation. Moreover, this able be further programmed photolithography situ create patterned for imparting specific functionalities. Enhanced its broad applicability various DES combinations, poised serve as crucial template methodology future development robust gels.

Language: Английский

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Polymerized and Colloidal Ionic Liquids─Syntheses and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(7), P. 3813 - 3931

Published: March 21, 2024

The breadth and importance of polymerized ionic liquids (PILs) are steadily expanding, this review updates advances trends in syntheses, properties, applications over the past five to six years. We begin with an historical overview genesis growth PIL field as a subset materials science. (ILs) nano meso length-scales exhibiting 0D, 1D, 2D, 3D topologies defines colloidal liquids, CILs, which compose subclass PILs provide synthetic bridge between IL monomers (ILMs) micro macro-scale materials. second focus addresses design syntheses ILMs their polymerization reactions yield PIL-based A burgeoning diversity reflects increasing use nonimidazolium nuclei expanding step-growth chemistries synthesizing Radical chain remains primary method making controlled methods. Step-growth used creating some CILs utilize extensive cross-linking. This cross-linking is enabled by incorporating reactive functionalities PILs, these may be viewed exotic agents. third part update focuses upon key including molecular weight, thermal rheology, ion transport, self-healing, stimuli-responsiveness. Glass transitions, critical solution temperatures, liquidity properties that tie rheology viscoelasticity. These turn modulate mechanical foundational PILs. Cross-linking gelation ionogels reversible essential for self-healing Stimuli-responsiveness distinguishes from many other classes polymers, it emphasizes segmentally controlling tuning solvation fourth development applications, diverse scope such supports Adhesion supported ionogel especially tunable interactions adjacent phases. Antimicrobial antifouling consequences cationic nature Similarly, emulsion dispersion rely on functional groups how interact continuous phases substrates. Catalysis another significant application, ILs component also provides connection porous carbon templated catalysts or serve catalysts. Devices, sensors actuators, stimuli-responsiveness include photo electrochemical stimuli. conclude our view printing. largest components energy related developments supercapacitors, batteries, fuel cells, solar cells. vision will evolve next decade.

Language: Английский

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Environment‐Tolerant Conductive Eutectogels for Multifunctional Sensing

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 29, 2024

Abstract Conductive hydrogels have shown significant potential in the realm of flexible electronics; however, using water as a solvent introduces problems such low‐temperature freezing and loss. One possible solution to address these limitations is replacing with deep eutectic solvents (DES). In this study, PHEAA–gelatin–MXene (PGM) eutectogels are constructed poly( N ‐hydroxyethyl acrylamide) (PHEAA) gelatin main components, MXene nanosheets added nanofillers. The PGM exhibit exceptional tensile compressive mechanical properties, including remarkable stretchability (940%), high strength (0.5 MPa), toughness (1.39 MJ m −3 ), impressive (0.3 MPa at 80% strain). Additionally, demonstrate excellent adhesion, anti‐freezing, long‐term anti‐drying abilities. Moreover, multifunctional sensors allow sensitivity, which enables accurate real‐time stable monitoring human activities over wide temperature range. Consequently, hold great candidates fields wearable devices, personal healthcare, human–machine interfaces.

Language: Английский

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Conductive Hyaluronic Acid/Deep Eutectic Solvent Composite Hydrogel as a Wound Dressing for Promoting Skin Burn Healing Under Electrical Stimulation

Advanced Healthcare Materials, Journal Year: 2024, Volume and Issue: 13(17)

Published: April 3, 2024

Abstract Burns can cause severe damage to the skin due bacterial infection and inflammation. Although conductive hydrogels as electroactive burn‐wound dressings achieve remarkable effects on accelerating wound healing, issues such imbalance between their high conductivity mechanical properties, easy dehydration, low transparency must be addressed. Herein, a double‐network eutectogel is fabricated by integrating polymerizable deep eutectic solvents (PDESs)including acrylamide/choline chloride/glycerol (acrylamide‐polymerization crosslink) thiolated hyaluronic acid (disulfide‐bonding crosslink). The introduction of PDESs provides with (up 0.25 S·m −1 ) strength (tensile strain 59–77%) simulating those natural human skin, well satisfactory tissue adhesiveness, self‐healing ability, antibacterial properties. When combined exogenous electrical stimulation, exhibits ability reduce inflammation, stimulate cell proliferation migration, promote collagen deposition angiogenesis, facilitate remodeling. This shows great potential dressing for healing major burn wounds.

Language: Английский

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Recent Advances and Developments in Injectable Conductive Polymer Gels for Bioelectronics

ACS Applied Bio Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 16, 2024

Soft matter bioelectronics represents an emerging and interdisciplinary research frontier aiming to harness the synergy between biology electronics for advanced diagnostic healthcare applications. In this context, a whole family of soft gels have been recently developed with self-healing ability tunable biological mimetic features act as tissue-like space bridging interface electronic device dynamic fluids body tissues. This review article provides comprehensive overview electroactive polymer gels, formed by noncovalent intermolecular interactions covalent bonds, injectable covering their synthesis, characterization, First, hydrogels crafted from conducting polymers (poly(3,4-ethylene-dioxythiophene) (PEDOT), polyaniline (PANi), polypyrrole (PPy))-based networks which are connected through physical (e.g., hydrogen bonding, π–π stacking, hydrophobic interactions) or bonds imine Schiff-base, borate ester bonds) addressed. Injectable involving hybrid conductive nanomaterials (i.e., graphene oxide, carbon nanotubes, metallic nanoparticles, etc.) also discussed. Besides, it delves into recent advancements in ionic liquid-integrated (iongels) deep eutectic solvent-integrated (eutectogels), present promising avenues future research. Finally, current applications prospects cutting-edge bioelectronic ranging tissue engineering biosensing outlined.

Language: Английский

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