Mobility Control of Mechanical Bonds to Modulate Energy Dissipation in Mechanically Interlocked Networks

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

Published: March 11, 2025

Mechanically interlocked networks (MINs) with dense mechanical bonds can amplify the dynamic behaviors of to exhibit decent properties. Energy dissipation resulting from bond motion is essential for improving toughness, yet effective strategies optimize this process remain underexplored. Here, by designing models controllable mobility, we establish a fortification strategy two key factors governing energy dissipation, host–guest recognition and sliding friction, thereby enabling property enhancement mechanically materials. Specifically, [2]rotaxanes in MIN-1 MIN-2 identical axle structures, incorporating small benzo-21-crown-7 ring large benzo-24-crown-8 ring. Strain rate-dependent cyclic tensile tests reveal that required drive 510 260 kJ/m3, respectively, indicating wheel size enhances recognition. Furthermore, apparent activation (11.0 kJ/mol) higher than (6.70 kJ/mol), suggesting increased friction MIN-1. Due these aspects, exhibits superior performance (damping capacity = 92%) compared (78%), translating toughness (7.50 vs 5.70 MJ/m3).

Language: Английский

Flexible supramolecular polymer proton conductors with high mechanical-conductive decoupling ability

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Language: Английский

Mechanically Robust, Hydrophobic, and Recyclable Dynamic Aerogels via Organic–Inorganic Hybridization

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

Published: May 2, 2025

Language: Английский