Carbon nanotubes (CNTs) were added into the self-healing polyurethane materials as conductive filler, the mass fraction of carbon nanotubes was adjusted, and 1% polyaniline was doped. The conductive self-healing polyurethane composites with different carbon nanotubes content (PU)-1/3/5/8/10 were prepared, and analyzed and tested. The result shows that the permeability threshold value of the composite material is 8wt%, and the comprehensive performance of the composite material PU-8 is the best; the resistance of PU-8 is 1278Ω, PU-8P has a resistance of 1400Ω; using an infrared camera, it can be seen that the material can reach 143.3 °C under the DC current of 0.1A, reaching the temperature condition when the material is repaired; the swelling test shows that the PU-8P equilibrium swelling rate is 177%, the gel content is 52.67%, and there is no dissolution in dimethyl sulfoxide. Solvent stability is better than PU-8;DSC test shows that the glass transition temperature of the soft segment of PU-8P is 43 °C, and the glass transition temperature of the hard segment is − 55 °C, which is not much different from that of PU-8; TG test shows that the epitaxial starting temperature of PU-8P is 365 °C; the observation photo is magnified by a stereo microscope at ten times and the PU-8P sample is cut of in the middle at room temperature, applying a constant voltage of 30 V, the cracks disappeared. The material cracks realized self-healing with electricity, and the repair efficiency reached 20.5%.

在自修复聚氨酯材料中加入碳纳米管（CNTs）作为导电填料，调整碳纳米管的质量分数，并掺杂1%的聚苯胺。制备了不同碳纳米管含量(PU)-1/3/5/8/10的导电自修复聚氨酯复合材料,并对其进行了分析和测试。结果表明，复合材料的渗透阈值为8wt%，复合材料PU-8的综合性能最好；PU-8的阻值为1278Ω，PU-8P的阻值为1400Ω；用红外相机观察，在0.1A的直流电流下，材料可达到143.3℃，达到材料修复时的温度条件；溶胀试验表明，PU-8P平衡溶胀率为177%，凝胶含量为52.67%，不溶于二甲亚砜。溶剂稳定性优于PU-8；DSC测试显示PU-8P软段玻璃化转变温度为43℃，硬段玻璃化转变温度为-55℃，相差不大来自 PU-8；TG测试表明PU-8P的外延起始温度为365℃；观察照片经体视显微镜放大10倍，室温下将PU-8P样品从中间切下，施加30V恒压，裂纹消失。材料裂纹实现带电自愈，修复效率达20.5%。硬段玻璃化转变温度为-55℃，与PU-8相差不大；TG测试表明PU-8P的外延起始温度为365℃；观察照片经体视显微镜放大10倍，室温下将PU-8P样品从中间切下，施加30V恒压，裂纹消失。材料裂纹实现带电自愈，修复效率达20.5%。硬段玻璃化转变温度为-55℃，与PU-8相差不大；TG测试表明PU-8P的外延起始温度为365℃；观察照片经体视显微镜放大10倍，室温下将PU-8P样品从中间切下，施加30V恒压，裂纹消失。材料裂纹实现带电自愈，修复效率达20.5%。