Ultra-stretchable, robust, self-healable conductive hydrogels enabled by the synergistic effects of hydrogen bonds and ionic coordination bonds toward high-performance e-skins

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 156800 - 156800

Опубликована: Окт. 1, 2024

Язык: Английский

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Waterborne polyurethane synthesized for leather with excellent wear and hydrolysis resistance enabled by bio-based poly(trimethylene carbonate) and l-lysine diisocyanate

Progress in Organic Coatings, Год журнала: 2024, Номер 193, С. 108553 - 108553

Опубликована: Июнь 1, 2024

Язык: Английский

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Si, B-containing dynamic covalent bonds enable excellent flame retardancy and reduced fire hazards for cyanate ester resin

Materials Horizons, Год журнала: 2024, Номер 11(20), С. 5094 - 5102

Опубликована: Янв. 1, 2024

Cyanate ester (CE) resins are distinguished by excellent dielectric properties in electronic packaging materials but face significant fire risks, with existing strategies often compromising their processability or original properties. Herein, we propose an innovative strategy involving the exchange of dynamic covalent bonds under heat stimuli aimed at forming a continuous and compact char layer to enhance safety CE resin. Using straightforward one-pot method, Si-O B-O were integrated into novel hyperbranched polymer (HPSiB), ensuring good compatibility resin while lowering its peak curing temperature 185 °C for facile processability. The resulting material 6 wt% HPSiB exhibits LOI value 32.8% UL-94 V0 rating, especially low total smoke production 6.7 m

Язык: Английский

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Biodegradable Polyester-Based Vitrimers Exhibiting Transesterification-Induced Topography Isomerization under Recycling

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(15), С. 9191 - 9199

Опубликована: Июль 25, 2024

In this work, biodegradable and polyester-based vitrimers possessing dynamic ester bonds are prepared by chemically cross-linking −OH-containing poly(glycerol sebacate) (PGS) with the formation of interchain bonds. enzymatic biodegradation tests, demonstrate high extents degradation (of about 85–90 wt %) after 60 days at 37 °C. The excess hydroxyl groups in bring a catalytic effect to transesterification. catalyst-free exhibit stress relaxation time 390 s 190 °C, an activation energy 45.0 kJ mol–1, glass transition temperature 8.0 topology freezing 48.7 Possessing both PGS main chains side sites, topography isomerization changes their mechanical properties under thermally recycling processes. has been demonstrated as effective precursor for preparation corresponding vitrimers. Moreover, processes could be interest further studies potential applications.

Язык: Английский

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Closed‐Loop Recyclable and Totally Renewable Liquid Crystal Networks with Room‐Temperature Programmability and Reconfigurable Functionalities

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Авг. 13, 2024

Abstract Dynamic covalent liquid crystal networks (DCv‐LCNs) with straightforward (re)programmability, reprocessability, and recyclability facilitates the manufacture of sophisticated LCN actuators intelligent robots. However, DCv‐LCNs are still limited to heat‐assisted programming polymer‐to‐polymer reprocessing/recycling, which inevitably lead deterioration structures actuation performances after repeated programming/processing treatments, owing thermal degradation polymer network and/or external agent interference. Here, a totally renewable azobenzene‐based DCv‐LCN room‐temperature programmability polymer‐to‐monomers chemical is reported, was synthesized by crosslinking azobenzene‐containing dibenzaldehyde monomer triamine via dynamic dissociable imine bonds. Thanks water‐activated dynamics bonds, resultant can be simply programmed, upon water‐soaking at room temperature, yield UV/Vis light‐driven actuator. Importantly, reported undergoes depolymerization in an acid‐solvent medium temperature because acid‐catalyzed hydrolysis giving rise easy separation recovery both monomers high purity, even tolerance additives. The recovered pure used regenerate new actuators, their functionalities reconfigured removing old introducing additives, implementing closed‐loop polymer‐monomers‐polymer recycling.

Язык: Английский

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Mechanically robust, creep resistant and photo-stimuli-responsive elastomer vitrimer enabled by integrating boronic ester bond and carboxyl-Fe3+ complex

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 693, С. 137568 - 137568

Опубликована: Апрель 16, 2025

Язык: Английский

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High‐Strength, Self‐Healing, and Conductive Polyurethane Enabled by Double Crosslinking Network for Advanced Multifunctional Strain Sensors

Macromolecular Rapid Communications, Год журнала: 2025, Номер unknown

Опубликована: Май 23, 2025

Abstract Flexible and stretchable conductive elastomers have broad application prospects in health monitoring, wearable flexible sensor, information encryption. However, the current electronic conductors fillers easily fall off, performance is unstable, other problems limit their practical applications. Therefore, developing a elastomer that combines high mechanical properties, good compatibility of filler with substrate, stable conductivity remains significant challenge. In this thesis, self‐healing excellent conductivity, substrate successfully synthesized by introducing high‐density hydrogen bonding dynamic disulfide into polyurethane network addition high‐performance filler, carbon black (Super P). It possesses 8.4 × 10 −4 S cm −1 at room temperature, tensile strength 27.5 MPa, an elongation break 578.7%, as well resilience 46% efficiency. Wearable strain sensors, designed for durability, stability, sensitivity, are ideal detecting human motion, monitoring rehabilitation training, enabling encrypted transmission. This study provides new ideas high‐performance, self‐repairable, recyclable materials, which promotes development devices.

Язык: Английский

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Bio-based polyurethane vitrimer with imine bonds: Excellent thermo-mechanical properties and heat recovery

Materials Today Communications, Год журнала: 2024, Номер 40, С. 110206 - 110206

Опубликована: Авг. 1, 2024

Язык: Английский

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Closed‐Loop Recyclable and Totally Renewable Liquid Crystal Networks with Room‐Temperature Programmability and Reconfigurable Functionalities

Angewandte Chemie, Год журнала: 2024, Номер 136(43)

Опубликована: Июнь 25, 2024

Abstract Dynamic covalent liquid crystal networks (DCv‐LCNs) with straightforward (re)programmability, reprocessability, and recyclability facilitates the manufacture of sophisticated LCN actuators intelligent robots. However, DCv‐LCNs are still limited to heat‐assisted programming polymer‐to‐polymer reprocessing/recycling, which inevitably lead deterioration structures actuation performances after repeated programming/processing treatments, owing thermal degradation polymer network and/or external agent interference. Here, a totally renewable azobenzene‐based DCv‐LCN room‐temperature programmability polymer‐to‐monomers chemical is reported, was synthesized by crosslinking azobenzene‐containing dibenzaldehyde monomer triamine via dynamic dissociable imine bonds. Thanks water‐activated dynamics bonds, resultant can be simply programmed, upon water‐soaking at room temperature, yield UV/Vis light‐driven actuator. Importantly, reported undergoes depolymerization in an acid‐solvent medium temperature because acid‐catalyzed hydrolysis giving rise easy separation recovery both monomers high purity, even tolerance additives. The recovered pure used regenerate new actuators, their functionalities reconfigured removing old introducing additives, implementing closed‐loop polymer‐monomers‐polymer recycling.

Язык: Английский

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Mechanically Robust and Chemically Recyclable Poly(β-Amino Esters)-Based Thermosetting Plastics

ACS Applied Polymer Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 25, 2024

Язык: Английский

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