基于红外辐射下狄尔斯-阿尔德反应的自修复银纳米线与还原氧化石墨烯/聚氨酯复合薄膜

Self-Healing Silver Nanowires and Reduced Graphene Oxide/Polyurethane Composite Film Based on the Diels-Alder Reaction under Infrared Radiation.

作者信息

Wang Yi, Zhou Zhimin, Chen Jiali, Li Sixing, Zheng Han, Lu Jiaxin, Wang Shuyue, Zhang Jiahao, Lin Kaiwen, Wang Ke, Wang Yuehui

机构信息

Materials and Food Department, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, China.

出版信息

Membranes (Basel). 2022 Apr 6;12(4):405. doi: 10.3390/membranes12040405.

DOI:10.3390/membranes12040405

PMID:35448375

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9030009/

Abstract

The hybrid composite of silver nanowires (AgNWs) and reduced graphene oxide (RGO) was synthesized in situ by an improved polyol-thermal method. The AgNWs-RGO with mass contents of 5-37 wt% was added into the thermo-reversible Diels-Alder reaction polyurethane (DA-PU) matrix with the AgNWs as the main conductor and the RGO as the auxiliary conductor to prepare self-healing composite conductive films. Further, the electrical conductivity, thermal conductivity, mechanical properties, infrared thermal response, and self-healing property of the composite film under infrared light irradiation were studied. The experimental results demonstrate that the AgNWs-RGO endows the composite film with good electrical and thermal conductivity and infrared thermal response ability, while the mechanical properties of the composite film decrease as the AgNWs-RGO mass content increases. The self-healing efficiency of the composite film is higher than that of the pure DA-PU under infrared light irradiation due to the good infrared photothermal response ability of the AgNWs-RGO. When the mass content of AgNWs-RGO in the composite film was 25 wt%, the AgNWs-RGO showed good dispersion in composite films, and the resistivity, thermal conductivity, and tensile strength of the composite film were 0.544 Ω·m, 0.3039 W·m·K, and 9.05 MPa, respectively. The infrared photothermal conversion temperature of the composite film is 158.5 °C (3450 lux for 1 min), and the infrared photothermal self-healing efficiency is 118% (3450 lux for 600 s). The AgNWs-RGO also improves the multiple self-healing ability of the composite film. The use of a high mass content of AgNWs-RGO in the composite film is beneficial in obtaining high multiple self-healing efficiencies. The first and the fifth infrared thermal self-healing efficiencies of the composite film with AgNWs-RGO of 35 wt% are 105% and 86%, respectively, and the resistivity of the composite film changes little and still maintains good conductivity.

摘要

采用改进的多元醇热法原位合成了银纳米线（AgNWs）与还原氧化石墨烯（RGO）的杂化复合材料。将质量含量为5 - 37 wt%的AgNWs - RGO添加到以AgNWs为主导体、RGO为辅助导体的热可逆狄尔斯 - 阿尔德反应聚氨酯（DA - PU）基体中，制备自修复复合导电薄膜。进一步研究了复合薄膜在红外光照射下的电导率、热导率、力学性能、红外热响应及自修复性能。实验结果表明，AgNWs - RGO赋予复合薄膜良好的电导率和热导率以及红外热响应能力，而复合薄膜的力学性能随着AgNWs - RGO质量含量的增加而降低。由于AgNWs - RGO具有良好的红外光热响应能力，复合薄膜在红外光照射下的自修复效率高于纯DA - PU。当复合薄膜中AgNWs - RGO的质量含量为25 wt%时，AgNWs - RGO在复合薄膜中表现出良好的分散性，复合薄膜的电阻率、热导率和拉伸强度分别为0.544 Ω·m、0.3039 W·m·K和9.05 MPa。复合薄膜的红外光热转换温度为158.5 °C（3450勒克斯照射1分钟），红外光热自修复效率为118%（3450勒克斯照射600秒）。AgNWs - RGO还提高了复合薄膜的多次自修复能力。在复合薄膜中使用高质量含量的AgNWs - RGO有利于获得高的多次自修复效率。质量含量为35 wt%的AgNWs - RGO复合薄膜的首次和第五次红外热自修复效率分别为105%和86%，复合薄膜的电阻率变化很小，仍保持良好的导电性。