Realization of dual crosslinked network robust, high toughness self-healing polyurethane elastomers for electronics applications

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 476, P. 146536 - 146536

Published: Oct. 11, 2023

Language: Английский

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Double crosslinked networks waterborne polyurethane with self-healing, recyclable and antibacterial functions based on dynamic bonds and used for temperature/light sensor

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 148994 - 148994

Published: Jan. 22, 2024

Language: Английский

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Regulation of Hard Segment Cluster Structures for High‐performance Poly(urethane‐urea) Elastomers

Advanced Science, Journal Year: 2024, Volume and Issue: 11(22)

Published: April 11, 2024

Abstract Elastomers are widely used in daily life; however, the preparation of degradable and recyclable elastomers with high strength, toughness, excellent crack resistance remains a challenging task. In this report, polycaprolactone‐based poly(urethane‐urea) elastomer is presented mechanical properties by optimizing arrangement hard segment clusters. It found that long alkyl chains chain extenders lead to small evenly distributed clusters, which beneficial for improving properties. Together multiple hydrogen bond structure stress‐induced crystallization, obtained exhibits strength 63.3 MPa, an toughness 431 MJ m −3 outstanding fracture energy 489 kJ −2 , while maintaining good recyclability degradability. believed holds great promise various application fields it contributes development sustainable society.

Language: Английский

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A rapid room-temperature self-healing, antibacterial, photoluminescent waterborne polyurethane coating with excellent mechanical properties based on double dynamic cross-linked network used for leather finishing

Progress in Organic Coatings, Journal Year: 2024, Volume and Issue: 190, P. 108386 - 108386

Published: March 14, 2024

Language: Английский

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Self-healing and reprocessable biobased non-isocyanate polyurethane elastomer with dual dynamic covalent adaptive network for flexible strain sensor

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152876 - 152876

Published: June 5, 2024

Language: Английский

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High-Strength and Excellent Self-Healing Polyurethane Elastomer Based on Rigid Chain Segment Reinforcement

Macromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Owing to their extensive application scope, elastomers that combine high strength and excellent self-healing efficiency have always attracted significant attention are still a contradiction. In this study, novel PU elastomer was prepared by combining rigid poly(amic acid) (PAA) chain segments 3,3-dithiodipropionic dihydrazide (DPH) containing sextuple hydrogen-bonding units disulfide bonds. The exhibited tensile of 50.1 MPa toughness 144.2 MJ/m3. PAA serve as framework, significantly enhancing the mechanical elastomer. Meanwhile, DPH with bonds enabled exhibit an 96.1% after 12 h at 80 °C. Additionally, strong reversible cross-linking arrays in endows it strength, ability, recyclability, allowing be recycled hot pressing dissolution.

Language: Английский

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Self-healing polyurethane elastomers with dynamic crosslinked networks for complex structure 3D printing

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160193 - 160193

Published: Feb. 1, 2025

Language: Английский

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Intrinsic and extrinsic self‐healing fiber‐reinforced polymer composites: A review

Polymer Composites, Journal Year: 2023, Volume and Issue: 44(10), P. 6304 - 6323

Published: Aug. 10, 2023

Abstract With their high specific modulus, strength and designability, fiber‐reinforced polymer (FRP) composites have replaced or surpassed traditional metallic materials in a wide range of applications. However, the matrix commonly used FRP is usually thermosetting that difficult to rework once formed, which implants substantial challenge for repair recycling composites. Self‐repair, as an emerging method repairing polymer‐based materials, has advantages simplification, efficiency repeatability against methods. Research on self‐healing developing rapidly becoming more systematic. development polymer, with capabilities are possible. This paper reviews current polymers recent years, emphasis applications According difference healing mechanisms, split into two categories, intrinsic extrinsic ones. The essential concepts different types first introduced. Then, pros cons discussed, respectively. Finally, perspectives well put forward. Highlights Development Extrinsic Pros Perspectives

Language: Английский

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Imparting Ultrahigh Strength to Polymers via a New Concept Strategy of Construction of up to Duodecuple Hydrogen Bonding among Macromolecular Chains

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(35)

Published: June 21, 2024

Abstract Interconnecting macromolecules via multiple hydrogen bonds (H‐bonds) can simultaneously strengthen and toughen polymers, but material synthesis becomes extremely difficult with increasing number of H‐bonding donors acceptors; therefore, most reports are limited to triple quadruple H‐bonds. Herein, this bottleneck is overcome by adopting a quartet‐wise approach constructing H‐bonds instead the traditional pairwise method. Thus, large be easily established, supramolecular interactions further reinforced. Especially, when such H‐bond motifs embedded in four macromolecular chains—rather than two as usual—are tied, distributing applied stress over larger volume more significantly improving overall mechanical properties. Proof‐of‐concept studies indicate that proposed intermolecular (up duodecuple) readily introduced polyurethane. A record‐high tensile strength (105.2 MPa) achieved alongside outstanding toughness (352.1 MJ m −3 ), fracture energy (480.7 kJ −2 fatigue threshold (2978.4 J ). Meantime, polyurethane has acquired excellent self‐healability recyclability. This strategy also applicable nonpolar polydimethylsiloxane, whose (15.3 (50.3 ) among highest reported date for silicones. new technique good expandability used develop even stronger polymers.

Language: Английский

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Anti-friction gold-based stretchable electronics enabled by interfacial diffusion-induced cohesion

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 6, 2024

Abstract Stretchable electronics that prevalently adopt chemically inert metals as sensing layers and interconnect wires have enabled high-fidelity signal acquisition for on-skin applications. However, the weak interfacial interaction between elastomers limit tolerance of device to external friction interferences. Here, we report an diffusion-induced cohesion strategy utilizes hydrophilic polyurethane wet gold (Au) grains render them wrapped by strong hydrogen bonding, resulting in a high binding strength 1017.6 N/m. By further constructing nanoscale rough configuration (RPU), Au-RPU increases 1243.4 N/m, which is 100 4 times higher than conventional polydimethylsiloxane styrene-ethylene-butylene-styrene-based devices, respectively. The stretchable can remain good electrical conductivity after 1022 frictions at 130 kPa pressure, reliably record electrophysiological signals. Furthermore, anti-friction pressure sensor array constructed based on wires, demonstrating superior mechanical durability concentrated large acquisition. This chemical modification-free approach strengthening metal-based promising three-dimensional integration on-chip interconnection.

Language: Английский

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