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Dynamic Cross-Linked Polyurea/Polydopamine Nanocomposites for Photoresponsive Self-Healing and Photoactuation
Macromolecules ( IF 5.1 ) Pub Date : 2022-03-02 , DOI: 10.1021/acs.macromol.1c02534
Zhongqun Zhou 1 , Xuting Wang 2 , Hancheng Yu 1 , Caili Yu 3 , Faai Zhang 1
Macromolecules ( IF 5.1 ) Pub Date : 2022-03-02 , DOI: 10.1021/acs.macromol.1c02534
Zhongqun Zhou 1 , Xuting Wang 2 , Hancheng Yu 1 , Caili Yu 3 , Faai Zhang 1
Affiliation
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Designing self-healing materials with multiresponsive self-healing and high mechanical performance has promising applications in wearable electronics and soft robots. In this study, polydopamine (PDA) particles and hindered urea bonds are used as functional nanofillers and dynamic motifs, respectively, in the production of dynamic cross-linked polyurea/PDA (DCPU/PDA) nanocomposites via facile in situ photoinitiated copolymerization. PDA particles form good interfacial bonds with the DCPU matrix, which endows the nanocomposites with enhanced thermomechanical and remotely photoresponsive self-healing properties as well as excellent photothermal effects. DCPU/PDA nanocomposites have higher toughness (∼14.96 ± 2 MJ m–3) and stretchability (up to 334 ± 20%) than pure DCPU. When damaged, they self-heal rapidly and effectively in response to near-infrared light. The fast responsive self-healing ability is enabled by the excellent photothermal effect of PDA and the dynamic exchange reaction of the hindered urea bonds. In addition, DCPU/PDA nanocomposites are malleable and easily recyclable. Finally, their outstanding photoactuation makes them suitable for applications as soft actuators in wearable electronics and soft robots.
中文翻译：
用于光响应自愈和光驱动的动态交联聚脲/聚多巴胺纳米复合材料
设计具有多响应自修复和高机械性能的自修复材料在可穿戴电子产品和软机器人中具有广阔的应用前景。在这项研究中，聚多巴胺（PDA）颗粒和受阻脲键分别用作功能性纳米填料和动态基序，通过简便的原位光引发共聚制备动态交联聚脲/PDA（DCPU/PDA）纳米复合材料。PDA 颗粒与 DCPU 基质形成良好的界面结合，赋予纳米复合材料增强的热机械和远程光响应自愈性能以及优异的光热效应。DCPU/PDA 纳米复合材料具有更高的韧性 (∼14.96 ± 2 MJ m –3) 和可拉伸性（高达 334 ± 20%）比纯 DCPU。当受损时，它们会响应近红外光而快速有效地自我修复。PDA优异的光热效应和受阻脲键的动态交换反应使快速响应的自愈能力成为可能。此外，DCPU/PDA 纳米复合材料具有延展性且易于回收利用。最后，它们出色的光致动使它们适用于可穿戴电子设备和软机器人中的软致动器应用。
更新日期：2022-03-02
中文翻译：
用于光响应自愈和光驱动的动态交联聚脲/聚多巴胺纳米复合材料
设计具有多响应自修复和高机械性能的自修复材料在可穿戴电子产品和软机器人中具有广阔的应用前景。在这项研究中，聚多巴胺（PDA）颗粒和受阻脲键分别用作功能性纳米填料和动态基序，通过简便的原位光引发共聚制备动态交联聚脲/PDA（DCPU/PDA）纳米复合材料。PDA 颗粒与 DCPU 基质形成良好的界面结合，赋予纳米复合材料增强的热机械和远程光响应自愈性能以及优异的光热效应。DCPU/PDA 纳米复合材料具有更高的韧性 (∼14.96 ± 2 MJ m –3) 和可拉伸性（高达 334 ± 20%）比纯 DCPU。当受损时，它们会响应近红外光而快速有效地自我修复。PDA优异的光热效应和受阻脲键的动态交换反应使快速响应的自愈能力成为可能。此外，DCPU/PDA 纳米复合材料具有延展性且易于回收利用。最后，它们出色的光致动使它们适用于可穿戴电子设备和软机器人中的软致动器应用。
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