Tang Qiaolin, Li Yanqi, Liu Jingya, Li Heshuang, Peng Qiang, Kang Ming, Kang Tianyi, Chang Guanjun
School of Materials and Chemistry and State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, 59, Middle Qinglong Avenue, Mianyang, 621010, P. R. China.
Zigong Centre for Disease Control and Prevention, 826, Huichuan Road, Zigong, 643000, P. R. China.
Adv Mater. 2025 Feb;37(6):e2415485. doi: 10.1002/adma.202415485. Epub 2024 Dec 18.
The intrinsic compromise between strength and toughness in composite epoxy resins significantly constrains their practical applications. In this study, a novel strategy is introduced, leveraging interfacial π-π stacking interactions to induce the "rolling behavior" of microsphere fillers, thereby facilitating efficient energy dissipation. This approach is corroborated through theoretical simulations and experimental validation. The resulting composite epoxy resin demonstrates an impressive 49.8% enhancement in strength and a remarkable 358.9% improvement in toughness compared to conventional epoxy resins, accompanied by substantially reduced hysteresis. Moreover, this system achieves reversible closed-loop recyclability and rapid repair capabilities. The preliminary demonstration of "force-temperature equivalence" further establishes a novel pathway for the design of high-performance composite epoxy materials.
复合环氧树脂在强度和韧性之间的内在折衷显著限制了它们的实际应用。在本研究中，引入了一种新策略，利用界面π-π堆积相互作用来诱导微球填料的“滚动行为”，从而促进有效的能量耗散。通过理论模拟和实验验证证实了该方法。与传统环氧树脂相比，所得复合环氧树脂的强度提高了49.8%，韧性显著提高了358.9%，同时滞后现象大幅减少。此外，该体系实现了可逆闭环可回收性和快速修复能力。“力-温度等效性”的初步证明进一步为高性能复合环氧材料的设计建立了一条新途径。
