Biomimetic snapping of polyhexahydrotriazine tough actuator driven by supramolecular interaction
Biomimetic snapping of polyhexahydrotriazine tough actuator driven by supramolecular interaction
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DOI：
10.1007/s10853-023-08480-w
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发表时间：
2023-04
影响因子：
4.5
通讯作者：
Lun-Quan Wang;Walter Li;Rui Yuan;Ying Huang;Q. Yin;Diwen Jiang;Guan-jun Chang;Li Yang
中科院分区：
文献类型：
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作者：
Lun-Quan Wang;Walter Li;Rui Yuan;Ying Huang;Q. Yin;Diwen Jiang;Guan-jun Chang;Li Yang
通过简单的理论和工艺设计来模拟自然界中神奇而复杂的现象的材料设计是必不可少的和具有挑战性的。在这里，我们通过简单的理论和技术设计描述了一种坚韧的聚六氢三嗪薄膜致动器，其弯曲行为与捕蝇草的折断一致。理论计算表明，该驱动器的驱动力来源于二氯甲烷与聚合物链之间的C-H/π相互作用和卤键相互作用。在两种超分子相互作用的驱动下，致动器弯曲并积累弹性势能，通过卡扣变形释放弹性势能，可以举起比自身重20倍的物体。随着时间的推移，致动器保持弯曲，弯曲程度增加，使其能够紧紧地包裹在物体周围，在保护材料和智能爬行系统中具有潜在的应用。此外，致动器具有良好的机械性能，耐溶剂性和热性能，具有抵抗极端条件的能力。
The design of materials that can simulate the magical and complex phenomena in nature through simple theoretical and process design are essential and challenging. Here we describe a tough polyhexahydrotriazine film actuator bent in response to dichloromethane through simple theory and technological design, and its curving behavior is consistent with the snapping of a Venus flytrap. Theoretical calculation demonstrates that the driving force of the actuator derives from the C–H/πinteraction and halogen bond interaction between dichloromethane and polymer chains. Driven by two supramolecular interactions, the actuator bends and accumulates elastic potential energy, releasing elastic potential energy through snapping deformation, which can lift objects 20 times heavier than itself. Over time, the actuator remains bent, and the degree of bending increases, allowing it to wrap tightly around the object, with potential applications in protective materials and intelligent crawling systems. In addition, the actuator possesses good mechanical properties, solvent resistance, and thermal properties, with the ability to resist extreme conditions.