Recent advances in self-healing polymer-modified asphalt utilizing dynamic covalent bonds

Journal of Polymer Research, Journal Year: 2025, Volume and Issue: 32(1)

Published: Jan. 1, 2025

Language: Английский

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Bioactive Metal Ion-Coordinated Dynamic Hydrogel with Antibacterial, Immunomodulatory, and Angiogenic Activities for Infected Wound Repair

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(25), P. 32104 - 32117

Published: June 12, 2024

The repair of infected wounds is a complex physiopathologic process. Current studies on wound treatment have predominantly focused infection treatment, while the factors related to delayed healing caused by vascular damage and immune imbalance are commonly overlooked. In this study, an extracellular matrix (ECM)-like dynamic multifunctional hyaluronic acid (HA) hydrogel with antimicrobial, immunomodulatory, angiogenic capabilities was designed as dressing for skin wounds. network in based reversible metal–ligand coordination formed between sulfhydryl groups bioactive metal ions. our design, antibacterial silver immunomodulatory zinc ions were employed coordinate sulfhydrylated HA vasculogenic peptide. addition desired bioactivities wounds, could also exhibit self-healing injectable abilities. Animal experiments models indicated that dressings enabled minimally invasive injection seamless covering then facilitated efficient bacterial killing, continuous inflammation inhibition, improved blood vessel formation. conclusion, ion-coordinated hydrogels wound-infection-desired ECM-like structures represent class tissue bionic chronic

Language: Английский

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Enhanced Electro-Actuation and Self-Healing Properties of Dielectric Elastomers by Introducing Ultrafine BaTiO₃ and Semi-Interpenetrating Macromolecules

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 4, 2025

The dielectric elastomer (DE) is a kind of electroactive polymer that can deform under an applied electric field. However, it remains challenging to effectively enhance the electro-actuation DE at low driving fields. Furthermore, during long-term utilization, vulnerable aging and mechanical damage, which inevitably affects its electromechanical stability seriously shortens service life. Thus, crucial prepare composites featuring large low-field-actuated strain along with self-healing capability. Herein, ultrafine BaTiO3 (uf-BaTiO3) nanoparticle methyl vinyl silicone (MVQ) incorporating polydimethylsiloxane (PDMS)-based composite was prepared construct typical semi-interpenetrating network. uf-BaTiO3 nanoparticles specific surface area form more heterogeneous interfaces PDMS matrix, leading significant improvement in interfacial polarization. Meanwhile, MVQ macromolecule avoid introduction defects within due excellent compatibility matrix. In particular, electro-actuated 50.7% field 50 V/μm high efficiency 76% short time 15 min be obtained from 5 MVQ/3 wt % uf-BaTiO3/PDMS composite. This study provides feasible route for preparing advanced simultaneously improved low-field property

Language: Английский

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Simultaneous catalyst-free cross-linking and mechanical reinforcement of silicone rubber composites via polydopamine decorated silica nanoparticles

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 105955 - 105955

Published: Feb. 1, 2025

Language: Английский

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A cephalopod-inspired multi-environmental adaptive self-healing polyurethanes

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 44, P. 102580 - 102580

Published: Feb. 6, 2025

Language: Английский

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Visible-Light-Driven and Adaptable Liquid-Crystalline Elastomer Actuators Containing Dynamically Exchangeable Boron Ester and Disulfide Linkages

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

A liquid-crystalline elastomer (LCE) containing dynamically exchangeable disulfide (−S–S−) and boron ester (BE) bonds (LCESS-BE) was successfully prepared. The −S–S– linkages were introduced in the form of a reactive oligomer prepared via thiol-acrylate Michael addition reaction with bis(2-hydroxyethyl) acrylate, while BE incorporated visible-light-induced cross-linking 4-((allyloxy)methyl)-2-(4-vinylphenyl)-1,3,2-dioxaborolane (AMVD). monodomain LCESS-BE (MLCESS-BE) ∼1 wt % AMVD promoted photothermal actuation under blue-light irradiation, resulting rise its temperature ∼147 °C decrease length ∼42%. In addition, films exhibited reversible reprogrammability through two dynamic exchange reactions (DERs) involving either or linkages. induced water-assisted healing hydration/dehydration DER ambient conditions glue-free method, UV-light-induced below nematic-to-isotropic transition temperature, thus maintaining nematic order during DER. This approach represents promising method for preparation MLCEs light-induced multifunctionality reprogramming, reprocessing, properties.

Language: Английский

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Construction of Polyurethane with Excellent Water-Tolerant and Self-Healing Properties by the Efficient Synergy of Imine Bonds and Aliphatic Long Chains

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Language: Английский

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The importance of interface interactions in flexible sensing materials: Classification, effect, and application

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162276 - 162276

Published: April 1, 2025

Language: Английский

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