材料科学
自愈
弹性体
执行机构
复合材料
光热效应
自愈材料
氢键
纳米片
极限抗拉强度
复合数
电磁屏蔽
纳米技术
计算机科学
纳米颗粒
分子
化学
医学
替代医学
有机化学
病理
人工智能
作者
Chuansong Yu,Yuyan Wang,Xiaoyan Qiu,Jize Liu,Xinkai Li,Xin Yang,Xin Huang,Xinxing Zhang,Zhenming Chen
标识
DOI:10.1016/j.cej.2023.146079
摘要
Self-healing ability is highly desired for flexible actuators that operate in dynamic and real-world environments, as these machines are vulnerable to mechanical damage. However, self-healing properties and mechanical strength are often difficult to combine at the same time. We report a synergistic enhancement strategy based on the ordered micro-nano structure and interfacial hydrogen bonding aggregation to achieve self-healing elastomer toughening. The hydrogen bonding interaction drives the MXene nanosheet to self-assemble into an interconnected network around the PU latex microsphere. Thanks to the synergy of dynamic physical networks and high-density interfacial hydrogen bonding, the composites with controllable room temperature self-healing efficiency (76.5–95.9%) and tensile strength (17.7–42.6 MPa). Furthermore, the MXene network structure of the composite endows the actuator with an efficient photothermal conversion efficiency, fast responsiveness, and even functional recovery. It is an effective strategy to achieve high-strength self-healing materials through hydrogen bonding connected MXene network and interfacial hydrogen bonding aggregation, which is expected to be applied to other flexible devices, such as flexible sensors and electromagnetic shielding.
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