近日，上海交通大学颜徐州团队实现了机械键合增韧环氧树脂。2025年11月26日出版的《德国应用化学》杂志发表了这项成果。

环氧树脂虽以其卓越机械强度成为不可或缺的材料，但其本质脆性却带来根本性局限。

研究组通过战略性引入基于[2]轮烷的机械互锁键作为交联剂，实现了环氧增韧技术的新突破——该机械键独特的分子内运动能在受力时实现高效能量耗散与应力重分布。由此制备的机械互锁环氧网络（MINEP）表现出272%的断裂伸长率和37.9 MJ m⁻³的韧性，这两项指标均达到传统环氧树脂的十倍提升，相较其他环氧材料也展现出显著优越性。

研究组进一步利用MINEP的粘附特性与良好韧性对石墨烯薄膜进行增强处理：相较于原始石墨烯薄膜，MINEP键合薄膜的韧性（30.2 MJ m⁻³ vs 3.4 MJ m⁻³）、断裂伸长率（26.5% vs 9.9%）和极限强度（237 MPa vs 72.3 MPa）均获得显著提升。该工作不仅为高性能环氧树脂开发提供了有效策略，更开拓了其在二维材料增韧领域的应用前景。

附：英文原文

Title: Mechanical-Bond-Toughened Epoxy Resins

Author: Chunyu Wang, Tinghao Yun, Wei You, Yi Ding, Zhiwei Fan, Guoquan Liu, Wei Yu, Xuzhou Yan

Issue&Volume: 2025-11-26

Abstract: Epoxy resins, while indispensable for their excellent mechanical strength, face fundamental limitations due to their inherent brittleness. Here we present a novel advancement in epoxy toughening through the strategic incorporation of [2]rotaxane-based mechanical bond as mechanically interlocked cross-linker, whose unique intramolecular motion enables efficient energy dissipation and stress redistribution under external force. As a result, the as-prepared mechanically interlocked epoxy networks (MINEP) exhibit elongation of 272% and toughness of 37.9 MJ m3, both representing an order-of-magnitude improvement over the conventional counterpart while showcasing notable properties compared to other epoxy materials. Further, we capitalize on the adhesive effect and good toughness of MINEP to toughen graphene films. Compared to pristine graphene films, the MINEP-bonded films show significantly enhanced toughness (30.2 versus 3.4 MJ m3), elongation (26.5% versus 9.9%), and maximum strength (237 versus 72.3 MPa). This work not only provides an effective strategy for the development of high-performance epoxy resins, but also exploits their application potential in toughening two-dimensional (2D) materials.

DOI: 10.1002/anie.202516283

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202516283