Synergetic Lithium and Hydrogen Bonds Endow Liquid‐Free Photonic Ionic Elastomer with Mechanical Robustness and Electrical/Optical Dual‐Output

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: March 6, 2023

Photonic ionic elastomers (PIEs) capable of multiple signal outputs are intriguing in flexible interactive electronics. However, fabricating PIEs with simultaneous mechanical robustness, good conductivity, and brilliant structure color still remains challenging. Here, the limitations broken through introducing synergistic effect lithium hydrogen bonds into an elastomer. In virtue bonding between ions carbonyl groups polymer matrix as well silanol on surface silica nanoparticles (SiNPs) ether along chains, demonstrate strength up to 4.3 MPa toughness 8.6 MJ m-3 . Meanwhile, synchronous electrical optical output under strains can be achieved presence dissociated contributed by bond non-close-packed SiNPs stabilized bond. Moreover, due their liquid-free nature, exhibit extraordinary stability durability, which withstand extreme conditions including both high low temperatures humidity. This work provides a promising molecular engineering route construct high-performance photonic conductors toward advanced ionotronic applications.

Language: Английский

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High‐Toughness and High‐Strength Solvent‐Free Linear Poly(ionic liquid) Elastomers

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(7)

Published: Oct. 11, 2023

Abstract Solvent‐free elastomers, unlike gels, do not suffer from solvent evaporation and leakage in practical applications. However, it is challenging to realize the preparation of high‐toughness (with both high stress strain) ionic elastomers. Herein, linear poly(ionic liquid) (PIL) elastomers are constructed via supramolecular networks formed by polymerization halometallate liquid (IL) monomers, without any chemical crosslinking. The obtained PIL exhibit strength (16.5 MPa), Young's modulus (157.49 toughness (130.31 MJ m −3 ), crack propagation insensitivity (fracture energy 243.37 kJ −2 owing enhanced intermolecular noncovalent interactions chains. Furthermore, elastomer‐based strain, pressure, touch sensors have shown sensitivity. crosslinked network endows with self‐healing recyclable properties, broad application prospects fields flexible sensor devices, health monitoring, human–machine interaction.

Language: Английский

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A Fully Self‐Healing and Highly Stretchable Liquid‐Free Ionic Conductive Elastomer for Soft Ionotronics

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(49)

Published: Aug. 4, 2023

Abstract Soft ionic conductors hold great potential for soft ionotronics, such as skin, human–machine interface and luminescent device. However, most hydrogel ionogel‐based suffer from freezing, evaporation liquid leakage problems, which limit their use in complex environments. Herein, a class of liquid‐free conductive elastomers (ICEs) is reported an alternative conductor ionotronics. These ICEs offer combination desirable properties, including extraordinary stretchability (up to 1913%), toughness 1.08 MJ cm −3 ), Young's modulus 0.67 MPa), rapid fully self‐healing capability at room temperature, good conductivity 1.01 × 10 −5 S −1 ). The application these demonstrated by creating wearable sensor that can detect discriminate minimal deformations human body movements, finger or elbow joint flexion, walking, running, etc. In addition, ionotronic devices are confront mechanical breakdown, skin alternating‐current electroluminescent device reuse damage. It believed promises applications

Language: Английский

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Entropy-Driven Design of Highly Impact-Stiffening Supramolecular Polymer Networks with Salt-Bridge Hydrogen Bonds

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(11), P. 7533 - 7542

Published: March 7, 2024

Impact-stiffening materials that undergo a strain rate-induced soft-to-rigid transition hold great promise as soft armors in the protection of human body and equipment. However, current impact-stiffening materials, such polyborosiloxanes shear-thickening fluids, often exhibit limited response. Herein, we propose design strategy for fabricating highly supramolecular polymer networks by leveraging high-entropy-penalty physical interactions. We synthesized fully biobased comprising poly(α-thioctic acid) arginine clusters, whose chain dynamics are governed specific guanidinium-carboxylate salt-bridge hydrogen bonds. The resulting material exhibits an exceptional response ∼2100 times, transitioning from dissipating state (21 kPa, 0.1 Hz) to stiffened glassy (45.3 MPa, 100 with increasing rates. Moreover, material's high energy-dissipating hot-melting properties bring excellent damping performance easy hybridization other scaffolds. This entropy-driven approach paves way development next-generation soft, sustainable, impact-resistant materials.

Language: Английский

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Extremely strengthening fatigue resistance, elastic restorability and thermodynamic stability of a soft transparent self-healing network based on a dynamic molecular confinement-induced bioinspired nanostructure

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(8), P. 2968 - 2979

Published: Jan. 1, 2023

Soft self-healing materials are crucial for the development of next-generation wearable electronics that could function in dynamic environments and resist mechanical damage. However, several challenges remain, including fatigue fracture, poor elasticity, thermodynamic lability, which significantly limit their practical applications. Here, with a model system soft polyurea, we propose molecular engineering strategy transforming inherently fragile an island-like structure into resilient ones bicontinuous nanophase separation using 2-ureido-4-pyrimidinone (UPy) supramolecular motifs as structural regulators. The continuous hard domains modified by UPy formed repairable network similar to those reticular layer animal dermis. This design allows simultaneous tremendous improvement threshold (34.8-fold increase), elastic restorability (the maximum elongation full dimensional recovery increasing from 6 times 13 times), stability (4 orders magnitude characteristic flow transition relaxation time), without compromising compliance, autonomous self-healing, optical transparency. These improvements address current limitations unfilled reliable substrates transparent strain-electronics.

Language: Английский

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Ultrastable, Superrobust, and Recyclable Supramolecular Polymer Networks

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)

Published: Jan. 18, 2024

Abstract Supramolecular polymer networks (SPNs), crosslinked by noncovalent bonds, have emerged as reorganizable and recyclable polymeric materials with unique functionality. However, poor stability is an imperative challenge faced SPNs, because SPNs are susceptible to heat, water, and/or solvents due the dynamic reversible nature of bonds. Herein, design a cooperative network (NCoN) simultaneously stabilize reinforce reported, resulting in ultrastable, superrobust, SPN. The NCoN constructed multiplying H‐bonding sites tuning conformation/geometry segment optimize multivalence cooperativity H‐bonds. rationally designed high conformational compliance favors formation tightly packed H‐bond arrays comprising higher‐density stronger Consequently, H‐bonded crosslinks display covalent crosslinking effect but retain on‐demand dynamics reversibility. resultant ultrastable SPN not only displays remarkable resistance heat up 120 °C, water soaking, broad spectrum solvents, also possesses superhigh true stress at break (1.1 GPa) ultrahigh toughness (406 MJ m −3 ). Despite covalent‐network‐like stability, through activating its reversibility high‐polarity solvent heated threshold temperature.

Language: Английский

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A Self‐Healing Solid‐State Ion‐Conductive Elastomer with High Mechanical Robustness and High Conductivity for Soft Ionotronics

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: May 19, 2024

Abstract Flexible and stretchable ion‐conductive elastomers have shown promising applications in wearable flexible sensor devices, biopotential detection, electroluminescent other areas. However, the currently employed gel‐based materials encounter issues such as solvent volatilization or leakage. Herein, there is an urgent requirement to develop a solid‐state ionic conductor material that both safe reliable, free from of liquid Here, study reports elastomer with excellent mechanical properties high conductivity based on synergistic strategy multiple interaction forces. The ion−conductive exhibits (1.42 × 10 −4 S cm −1 at 25 °C), superior stretchability (≈1550% elongation) strength (1.48 MPa). Moreover, resilience possesses self‐healing ability. sensor, prepared comprehensive performance, not only demonstrates strain sensitivity but also captures high‐quality epidermal signals human body detection. Additionally, can serve electrode devices for applications. It believed provide novel opportunities advancement soft ionotronics.

Language: Английский

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Ultrastretchable and Tough Poly(ionic liquid) Elastomer with Strain-Stiffening Ability Enabled by Strong/Weak Ionic Interactions

Macromolecules, Journal Year: 2024, Volume and Issue: 57(5), P. 2339 - 2350

Published: Feb. 28, 2024

Polymer ionic conductors have shown great promise as iontronic sensors for flexible wearable devices and intelligent machines. A series of exquisitely designed hydrogels, ionogels, elastomers good mechanical properties, such super stretchability high elasticity. However, most gels tend to exhibit softening or linear mechanoresponsive behavior when subjected stress, which is completely different from the strain-stiffening biological tissues. Therefore, designing polymer with properties ability remains a challenge, critical in improving reliability durability sensing. Here, we propose strong/weak interaction strategy develop poly(ionic liquid) (PILEs) through copolymerization imidazolium liquid monomers acrylate monomers. The design allows weak interactions impart softness network, while strong stiffen network during stretching. resulting transparent PILE possesses ultrastretchability, immense strain stiffening, elasticity, toughness, puncture resistance. also shows antibacterial adhesion due high-content charge groups network. These combined make an excellent candidate sensors, stability sensitivity temperature strain, demonstrating potential human–machine interfaces.

Language: Английский

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Entropy‐Driven Hydrated Eutectic Electrolytes with Diverse Solvation Configurations for All‐Temperature Zn‐ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)

Published: June 29, 2024

Batteries always encounter uncontrollable failure or performance decay under extreme temperature environments, which is largely limited by the properties of electrolytes. Herein, an entropy-driven hydrated eutectic electrolyte (HEE) with diverse solvation configurations proposed to expand operating range Zn-ion batteries. The HEE possesses over 40 types Zn

Language: Английский

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Intrinsic Solubilization of Lithium Nitrate in Ester Electrolyte by Multivalent Low‐Entropy‐Penalty Design for Stable Lithium‐Metal Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)

Published: Jan. 8, 2024

LiNO

Language: Английский

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