Salt-welding strategy for the design of repairable impact-resistant and wear-resistant hydrogels

Science Advances, Journal Year: 2025, Volume and Issue: 11(4)

Published: Jan. 24, 2025

Self-healing hydrogels can autonomously repair damage, enhancing their performance stability and broadening applications as soft devices. Although the incorporation of dynamic interactions enhances self-healing capabilities, it simultaneously weakens hydrogels’ strength. External stimuli such heating, while accelerating healing process, may also lead to dehydration. Developing a stable strategy that combines rapid high mechanical strength is challenging. Here, we introduce “salt-welding” for high-strength with room temperature self-healing. This achieved through borate ester bonds in salt-responsive poly(methacrylamide) hydrogel. The process involves “salt-fusion” convert fractures into viscous liquid swift healing, followed by “salt-concretion” toughen achieve posthealing 23 megapascals 95 minutes at temperature, near 100% efficiency. Leveraging tunable rate, hydrogel be tailored reparable wear-resistant material damping device.

Language: Английский

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Mechanically robust and dynamic supramolecular polymer networks enabled by [an]daisy chain backbones

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Language: Английский

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Diethyl-modified polydimethylsiloxane polymer-fluid-gels: Breakthrough of damping limits at ultra-low temperatures or ultra-high frequencies

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162167 - 162167

Published: April 1, 2025

Language: Английский

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Designing High-Mechanical-Property Organic Polymeric Crystals: Insights from Stress Dispersion and Energy Dissipation Strategies

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

Despite recent significant advancements in the applications of organic polymeric crystals (OPCs), a comprehensive understanding design principles for high-mechanical-property remains somewhat elusive. Here, we investigate mechanical properties OPCs from perspectives stress dispersion and energy dissipation by examining macrocycle three analogous polymers with different solvent fillings, utilizing novel research platform constructed via dative B-N bonds. Through thorough study investigation into molecular mechanisms these model topologies, it was demonstrated that structural expansion filling are effective pathways enhancing performance employing strategies. Overall, our showcases precise control over topology OPC materials elucidates specific modulating their performance, offering broader perspective efficiently other crystalline polymers, such as metal-organic frameworks (MOFs) covalent (COFs).

Language: Английский

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Multi‐Armed Molecule Drives High Energy Dissipation and Stiffness via Physically Cross‐Linking

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

Published: May 12, 2025

Abstract Damping materials, particularly viscoelastic polymeric are essential to mitigate or even eliminate vibration through energy dissipation. However, designing pure damping materials with high stiffness remains a challenge, which limits their application in constrained layer treatments for mechanical structures. Herein, chemical design of yet stiff supramolecular (SPMs) cross‐linked by small dendritic molecules quadruple H‐bonding units at the branch ends is proposed. These rationally designed not only enhance chain relaxation and improve performance original topology, but also maintain resultant level due newly generated robust H‐bonds. As result, these SPMs exhibit excellent across wide range frequencies temperatures, while simultaneously demonstrating key characteristics such as stiffness, adhesive properties, recyclability. Importantly, employed model system elucidate molecular mechanism underlying unique combination stiffness.

Language: Английский

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Hydrogen Bonding Enhanced Polysaccharide-Based Gels with Ultrahigh Stretchability and Unprecedented Crack Propagation Strain

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

Published: May 16, 2025

Language: Английский

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Solvent Polarity‐Induced Ultrahigh Strength Supramolecular Polyzwitterionic Organogels with Impact‐Stiffening, Damping, and Anti‐Freezing Properties

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

Published: May 24, 2025

Abstract Widely used polyzwitterionic hydrogels usually suffer from significant mechanical loss, owing to the strong hydration of zwitterionic groups. Herein, a novel solvent polarity‐induced strategy is introduced for developing pure supramolecular organogels with ultrahigh strength by using facile one‐pot synthesis process. The properties these can be well‐tuned adjusting polarity dihydric alcohol solvents regulate hydrogen bonding and dipole‐dipole interactions between polymer chains in organogel network. exhibit superior properties, including tensile 1.5 MPa, elongation at break 669%, toughness 3.2 MJ m − 3 , adhesive 506 kPa. Additionally, display outstanding impact response performance (maximum strain‐stiffening ratio 140 times, maximum impact‐stiffening 450 times) energy dissipation (energy above 60%, loss factor 2.0 1 Hz), resulting presence inter‐molecular internal friction. Notably, synergistic groups on side organic impart flexibility vibration absorption capabilities even low‐temperature environments. Furthermore, demonstrate flaw‐insensitivity, self‐healing ability, water processability, broadening their applicability more complex conditions.

Language: Английский

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Principles for designing sustainable and high-strain rate stress wave dissipating materials

Materials Horizons, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Dynamic covalent networks serve as effective tools for dissipating high-strain rate mechanical energy throughout reversible bond exchange reactions. Despite their potential, a gap exists in understanding how polymer chain mobility and the kinetics of reactions impact capabilities dynamic networks. This study presents an optimal strategy to enhance dissipation by controlling side structures rates Lipoic acid-derived polymers are chosen our model system due easily tunable chains disulfide-rich backbones. High-strain stress waves subjected using laser-induced shock wave technique. A strong correlation is observed between capability glass transition temperature poly(disulfide)s. Furthermore, addition catalyst accelerate disulfide reaction improves dissipation. Leveraging inherent nature cyclic disulfides, exhibit self-healing chemical recycling monomers. The principles this provide rational framework designing sustainable efficient materials.

Language: Английский

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