A Transparent, Highly Stretchable, Solvent‐Resistant, Recyclable Multifunctional Ionogel with Underwater Self‐Healing and Adhesion for Reliable Strain Sensors

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(51)

Published: Oct. 13, 2021

Ionogels have gained increasing attentions as a flexible conductive material. However, it remains big challenge to integrate multiple functions into one gel that can be widely applied in various complex scenes. Herein, kind of multifunctional ionogels with combination desirable properties, including transparency, high stretchability, solvent and temperature resistance, recyclability, conductivity, underwater self-healing ability, adhesiveness is reported. The are prepared via one-step photoinitiated polymerization 2,2,2-trifluoroethyl acrylate acrylamide hydrophobic ionic liquid. abundant noncovalent interactions hydrogen bonding ion-dipole endow the excellent mechanical strength, resilience, rapid capability at room temperature, while fluorine-rich polymeric matrix brings tolerance against water organic solvents, well tough adhesion on different substrates. Wearable strain sensors based sensitively detect differentiate large body motions, such bending limbs, walking jumping, subtle muscle movements, pronunciation pulse. It believed designed will show great promises wearable devices ionotronics.

Language: Английский

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Hydro/Organo/Ionogels: “Controllable” Electromagnetic Wave Absorbers

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(43)

Published: Sept. 6, 2022

Demand for electromagnetic wave (EMW) absorbers continues to increase with technological advances in wearable electronics and military applications. In this study, a new strategy overcome the drawbacks of current by employing co-contribution functional polymer frameworks liquids strong EMW absorption properties is proposed. Strongly polar water, dimethyl sulfoxide/water mixtures, highly conductive 1-ethyl-3-methylimidazolium ethyl sulfate ([EMI][ES]) are immobilized dielectrically inert networks form different classes gels (hydrogels, organogels, ionogels). These demonstrate high correlation between their dielectric polarity/ionic conductivity/non-covalent interaction liquids. Thus, performances can be precisely tuned over wide range due diversity stability The prepared hydrogels show good shielding performance (shielding efficiency > 20 dB) constants, while organogels moderate attenuation ability impedance matching achieve full-wave X-band (8.2-12.4 GHz) at 2.5 ± 0.5 mm. ionogels also offer effective bandwidth (10.79-16.38 GHz 2.2 mm) via prominent ionic conduction loss. short, work provides conceptually novel platform develop high-efficient, customizable, low-cost absorbers.

Language: Английский

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Fatigue-free artificial ionic skin toughened by self-healable elastic nanomesh

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

Published: July 29, 2022

Abstract Robust ionic sensing materials that are both fatigue-resistant and self-healable like human skin essential for soft electronics robotics with extended service life. However, most existing artificial skins produced on the basis of network reconfiguration suffer from a low fatigue threshold due to easy fracture low-energy amorphous polymer chains susceptible crack propagation. Here we engineer fatigue-free yet fully healable hybrid toughened by high-energy, elastic nanomesh, resembling repairable nanofibrous interwoven structure skin. Such design affords superhigh 2950 J m −2 while maintaining skin-like compliance, stretchability, strain-adaptive stiffening response. Moreover, nanofiber tension-induced moisture breathing matrix leads record-high strain-sensing gauge factor 66.8, far exceeding previous intrinsically stretchable conductors. This concept creates opportunities designing durable ion-conducting replicate unparalleled combinatory properties natural more precisely.

Language: Английский

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Rapid Gelation of Tough and Anti‐Swelling Hydrogels under Mild Conditions for Underwater Communication

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(1)

Published: Nov. 4, 2022

Abstract Swelling is ubiquitous for conventional hydrogels but not favorable many situations, especially underwater applications. In this study, an anti‐swelling and mechanically robust polyacrylic acid (PAAc)/gelatin composite hydrogel reported with a rapid gelation process (10 1 s) under mild conditions via the synergy of MXene‐activated initiation zirconium ion (Zr 4+ )‐induced cross‐linking, without requirement external energy input. The MXene found efficient to activate chain initiation, while Zr prone indispensable facilitating cross‐linking formed polymer chains. resulting exhibits integration exceptional properties high mechanical performance at room temperature, thanks dense hydrogen bonds between PAAc gelatin chains that enable upper critical solution temperature above temperature. Also, desirable electrical conductivity emerges in due simultaneous contribution , allowing stable signal output gel upon deformation underwater. As demonstration, communicator by harnessing as sensing module assembled, which capable wirelessly delivering messages decoder on ground Morse codes. This study provides exemplary way tough durable

Language: Английский

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Ionogels: recent advances in design, material properties and emerging biomedical applications

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(7), P. 2497 - 2527

Published: Jan. 1, 2023

This review describes the most recent developments in materials design and advanced features of ionogels, as well their emerging biomedical applications.

Language: Английский

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Highly Damping and Self‐Healable Ionic Elastomer from Dynamic Phase Separation of Sticky Fluorinated Polymers

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(10)

Published: Jan. 20, 2023

Shock-induced low-frequency vibration damage is extremely harmful to bionic soft robots and machines that may incur the malfunction of fragile electronic elements. However, current skin-like self-healable ionic elastomers as artificial sensing protecting layer still lack ability dampen vibrations, due their almost opposite design for molecular frictions material's elasticity. Inspired by two-phase structure adipose tissue (the natural damping skin layer), here, a highly elastomer with energy-dissipating nanophases embedded in an elastic matrix introduced, which formed polymerization-induced dynamic phase separation sticky fluorinated copolymers presence lithium salts. Such supramolecular decouples functions into two distinct phases, thus reconciles few intriguing properties including conductivity, high stretchability, softness, strain-stiffening, recovery, room-temperature self-healability, recyclability, most importantly, record-high capacity at human motion frequency range (loss factor tan δ > 1 0.1-50 Hz). This study opens door syntheses high-performance skins robust protective applications electronics robotics.

Language: Английский

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Non‐equilibrium‐Growing Aesthetic Ionic Skin for Fingertip‐Like Strain‐Undisturbed Tactile Sensation and Texture Recognition

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: March 2, 2023

Humans use periodically ridged fingertips to precisely perceive the characteristics of objects via ion-based fast- and slow-adaptive mechanotransduction. However, designing artificial ionic skins with fingertip-like tactile capabilities remains challenging because contradiction between structural compliance pressure sensing accuracy (e.g., anti-interference from stretch texture recognition). Inspired by formation modulus-contrast hierarchical structure fingertips, an aesthetic skin grown a non-equilibrium Liesegang patterning process is introduced. This periodic stiff ridges embedded in soft hydrogel matrix enables strain-undisturbed triboelectric dynamic as well vibrotactile recognition. By coupling another piezoresistive ionogel, sensory system further fabricated robotic mimic simultaneous multimodal sensations fingers grasping actions. approach may inspire future design high-performance sensors for intelligent applications robotics prosthetics.

Language: Английский

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Cellulose-Based Ionic Conductor: An Emerging Material toward Sustainable Devices

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(15), P. 9204 - 9264

Published: July 7, 2023

Ionic conductors (ICs) find widespread applications across different fields, such as smart electronic, ionotronic, sensor, biomedical, and energy harvesting/storage devices, largely determine the function performance of these devices. In pursuit developing ICs required for better performing sustainable cellulose appears an attractive promising building block due to its high abundance, renewability, striking mechanical strength, other functional features. this review, we provide a comprehensive summary regarding fabricated from cellulose-derived materials in terms fundamental structural features cellulose, design fabrication techniques engineering, main properties characterization, diverse applications. Next, potential cellulose-based relieve increasing concern about electronic waste within frame circularity environmental sustainability future directions be explored advancing field are discussed. Overall, hope review can unique perspectives on application advanced thereby encourage utilization cellulosic toward

Language: Английский

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Ionogels: Preparation, Properties and Applications

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 31, 2023

Abstract Ionogels, composed of ionic liquids and supporting networks, possess a plethora exceptional properties, including nonvolatility, remarkable thermal electrochemical stability, elevated mechanical strength, as well outstanding conductivity. Based on these extraordinary characteristics, ionogels have found extensive applications in diverse fields encompassing functional materials, sensors, soft electronics, solid electrolytes, biomedicine. In recent years, witnessed significant advancements emerged highly popular subject matter. Consequently, this review provides comprehensive overview the latest progress made realm ionogels. The preparation methods are initially introduced following concise introduction. Subsequently, properties ionogels, high low temperature resistance, conductivity, stimuli‐response self‐healing recyclability their structure‐property relationships, comprehensively discussed. Moreover, utilization skins, adhesions other domains also elaborated upon extensively. Finally, after succinct summary, challenges prospects regarding future development thoroughly deliberated.

Language: Английский

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Tough Liquid‐Free Ionic Conductive Elastomers with Robust Adhesion and Self‐Healing Properties for Ionotronic Devices

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(4)

Published: Oct. 20, 2023

Abstract Polymerizable deep eutectic solvent (PDES) as a newly emerging type of liquid‐free ionic conductive elastomer is considered to be the most attractive candidate for next generation ionotronic devices. However, it remains huge challenge integrate high conductivity, excellent mechanical properties, good self‐healing capacity, and robust adhesion into single material that satisfies stringent demand devices in various scenarios. Herein, constructed by incorporating tannic acid‐encapsulated cellulose nanocrystals (TA@CNC) multifunctional hydrogen bond donors (HBDs) along with poly(acrylic acid) choline chloride (hydrogen acceptors, HBAs) form dynamic cross‐linking network through multiple bonds. The presence rigid crystalline regions sufficient interaction sites on TA@CNC endow resultant elastomers (ACTC) superior properties (≈496 kPa, 2400%), (≈68.6 kPa), property. Benefiting from above integrated features, wearable sensors harnessing ACTC resistance sensing module provide unaltered performance under off‐axial deformation (twisting prick). Additionally, capacitance pressure sensor stability force distribution developed, opening up new avenue development

Language: Английский

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