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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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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Transparent, Mechanically Strong, Extremely Tough, Self‐Recoverable, Healable Supramolecular Elastomers Facilely Fabricated via Dynamic Hard Domains Design for Multifunctional Applications

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 30(3)

Published: Oct. 22, 2019

Abstract The design and synthesis of supramolecular self‐healing polymers with high healing efficiency excellent integrated mechanical properties is challenging due to conflicting attributes dynamic properties. Herein, this study introduces a concept, that is, “dynamic hard domains,” balance performance, strength, elastic recovery, at the same time obtain extreme toughness. essential features domains include: (i) noncrystallized loose structure, (ii) low binding energy mobility, (iii) sequential dissociation rapid rearrangement. Based on strategy, simple one‐step polycondensation route reported synthesize transparent polyurethane‐urea elastomer (PPGTD‐IDA), which successfully combines decent toughness, outstanding notch‐sensitiveness, self‐recoverability, room‐temperature self‐healing. Upon rupture, PPGTD‐IDA completely restores within 48 h. Furthermore, results demonstrate repeatable prominent antiaging healability. Taking advantages merits PPGTD‐IDA, it can be utilized for fabricating impact‐resistant materials protection aluminum alloys as well stretchable conductors, exhibits unique characteristics such stable conductivity during stretching (even after or notch), automatic elimination notch stretching/releasing cycles.

Language: Английский

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Bioinspired, Highly Adhesive, Nanostructured Polymeric Coatings for Superhydrophobic Fire-Extinguishing Thermal Insulation Foam

ACS Nano, Journal Year: 2021, Volume and Issue: 15(7), P. 11667 - 11680

Published: June 25, 2021

Lightweight polymeric foam is highly attractive as thermal insulation materials for energy-saving buildings but plagued by its inherent flammability. Fire-retardant coatings are suggested an effective means to solve this problem. However, most of the existing fire-retardant suffer from poor interfacial adhesion during use. In nature, snails and tree frogs exhibit strong a variety surfaces hydrogen-bonding mechanical interlocking, respectively. Inspired their mechanisms, we herein rationally design with phase-separated micro/nanostructures via facile radical copolymerization hydroxyethyl acrylate (HEA) sodium vinylsulfonate (VS). The resultant waterborne poly(VS-co-HEA) copolymers rigid polyurethane (PU) other substrates, better than current adhesives because combination interlocking. Besides superhydrophobic feature, poly(VS-co-HEA)-coated PU can self-extinguish flame, exhibiting desired V-0 rating vertical burning low heat smoke release due high charring capability, which superior previous counterparts. Moreover, well-preserved agrees well theoretical calculations. This work offers biomimetic strategy creating advanced adhesive many flammable substrates.

Language: Английский

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Extrusion 3D Printing of Polymeric Materials with Advanced Properties

Advanced Science, Journal Year: 2020, Volume and Issue: 7(17)

Published: Aug. 5, 2020

Abstract 3D printing is a rapidly growing technology that has an enormous potential to impact wide range of industries such as engineering, art, education, medicine, and aerospace. The flexibility in design provided by this technique offers many opportunities for manufacturing sophisticated devices. most widely utilized method extrusion‐based solid‐freeform fabrication approach, which extremely attractive additive both academic industrial research communities. This versatile, with the ability print dimensions, multimaterial, multifunctional structures. It also very affordable prototyping. However, lack variety printable polymers advanced material properties becomes main bottleneck further development technology. Herein, comprehensive review provided, focusing on strategies achieve or enhance printability including thermoplastics, thermosets, hydrogels, other extrusion techniques. Moreover, diverse exhibited printed polymers, mechanical strength, conductance, self‐healing, well integrated are highlighted. Lastly, stimuli responsiveness polymeric materials shape morphing, degradability, color changing discussed.

Language: Английский

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A Fast Room‐Temperature Self‐Healing Glassy Polyurethane

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(14), P. 7947 - 7955

Published: Jan. 15, 2021

Abstract We designed and synthesized a colorless transparent glassy polyurethane assembled using low‐molecular‐weight oligomers carrying large number of loosely packed weak hydrogen bonds (H‐bonds), which has glass transition temperature ( T g ) up to 36.8 °C behaves unprecedentedly robust stiffness with tensile Young's modulus 1.56±0.03 GPa. Fast room‐temperature self‐healing was observed in this polymer network: the broken (GPU) specimen can recover strength 7.74±0.76 MPa after healing for as little 10 min, is prominent compared reported polymers. The high density loose‐packed reversibly dissociate/associate below GPU (that secondary relaxation), enables reconfiguration damaged network fractured interfaces, despite extremely slow diffusion dynamics molecular chains under room temperature. This shows potential application an optical lens.

Language: Английский

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Assembling a Natural Small Molecule into a Supramolecular Network with High Structural Order and Dynamic Functions

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(32), P. 12804 - 12814

Published: July 26, 2019

Programming the hierarchical self-assembly of small molecules has been a fundamental topic great significance in biological systems and artificial supramolecular systems. Precise highly programmed can produce architectures with distinct structural features. However, it still remains challenge how to precisely control pathway desirable way by introducing abundant information into limited molecular backbone. Here we disclose strategy that directs sodium thioctate, molecule origin, ordered layered network. By combining unique dynamic covalent ring-opening-polymerization thioctate an evaporation-induced interfacial confinement effect, direct this simple scheduled pathway, resulting structure long-range order at both macroscopic scales, which is revealed small-angle wide-angle X-ray scattering technologies. The layers are found be able bind water as water, works interlayer lubricant modulate material properties, such mechanical performance, self-healing capability, actuating function. Analogous many reversibly self-assembled systems, polymeric network degraded monomers reformed water-mediated route, exhibiting full recyclability facile, mild, environmentally friendly way. This approach for assembling commercial structurally complex materials paves low-cost functional based on synthetically procedures.

Language: Английский

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Mechano-responsive hydrogen-bonding array of thermoplastic polyurethane elastomer captures both strength and self-healing

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

Published: Jan. 27, 2021

Self-repairable materials strive to emulate curable and resilient biological tissue; however, their performance is currently insufficient for commercialization purposes because mending toughening are mutually exclusive. Herein, we report a carbonate-type thermoplastic polyurethane elastomer that self-heals at 35 °C exhibits tensile strength of 43 MPa; this as strong the soles used in footwear. Distinctively, it has abundant carbonyl groups soft-segments fully amorphous with negligible phase separation due poor hard-segment stacking. It operates dual mechano-responsive mode through reversible disorder-to-order transition its hydrogen-bonding array; heals when static toughens dynamic. In mode, non-crystalline hard segments promote dynamic exchange disordered hydrogen-bonds self-healing. The forms stiff crystals stretched orders inter-chain hydrogen bonding. strain return pre-stressed state after release repeat healing process.

Language: Английский

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Disulfide-Mediated Reversible Polymerization toward Intrinsically Dynamic Smart Materials

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(5), P. 2022 - 2033

Published: Jan. 6, 2022

The development of a dynamic chemistry toolbox to endow materials behavior has been key the rational design future smart materials. rise supramolecular and covalent offers many approaches construction polymers that can adapt, respond, repair, recycle. Within this toolbox, building blocks based on 1,2-dithiolanes have become an important scaffold, featuring their reversible polymerization mediated by disulfide bonds, which enables unique class at intersection adaptable networks. This Perspective aims explore as versatile structural unit for summarizing state art well providing overview fundamental challenges involved in research area its potential directions.

Language: Английский

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Toughening a Self‐Healable Supramolecular Polymer by Ionic Cluster‐Enhanced Iron‐Carboxylate Complexes

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(13), P. 5278 - 5283

Published: Feb. 25, 2020

Supramolecular polymers that can heal themselves automatically usually exhibit weakness in mechanical toughness and stretchability. Here we exploit a toughening strategy for dynamic dry supramolecular network by introducing ionic cluster-enhanced iron-carboxylate complexes. The resulting simultaneous exhibits tough strength, high stretchability, self-healing ability, processability at room temperature. excellent performance of these distinct is attributed to the hierarchical existence four types combinations high-density network, including covalent disulfide bonds, noncovalent H-bonds, complexes clustering interactions. extremely facile preparation method this polymer offers prospects high-performance low-cost material among others coatings wearable devices.

Language: Английский

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