PPy@PDA nanoparticles, prepared by varying ratios of PPy and dopamine hydrochloride, could be used as near infrared (NIR)-absorbing photothermal agents given that the UV–vis–NIR light absorption spectra showed a broad absorption band at 800–900 nm. A NIR-induced shape memory-assisted self-healing epoxy resin coating was obtained, and its shape memory effect was investigated by 808 nm NIR irradiation. Results indicated that the addition of PPy@PDA nanoparticles improved the shape recovery behavior of the composite. The self-healing property of the coatings was investigated by electrochemical test. Results of linear sweep voltammetry (LSV) and electrochemical impedance spectra (EIS) verified that the coating with 5 wt% PPy@PDA nanoparticles had a much better light-induced shape memory effect, self-healing performance, and protective capability than those of other contents of PPy@PDA nanoparticles. Moreover, the shape memory effect of the coating should be affected by the corrosion product of the metallic substrate.

PPy@PDA 纳米粒子，由不同比例的 PPy 和盐酸多巴胺制备，可用作近红外 (NIR) 吸收光热剂，因为 UV-vis-NIR 光吸收光谱在 800-900 nm 处显示出宽吸收带。获得了一种近红外诱导形状记忆辅助自修复环氧树脂涂层，并通过 808 nm 近红外辐射研究了其形状记忆效应。结果表明，PPy@PDA 纳米粒子的加入改善了复合材料的形状恢复行为。通过电化学测试研究了涂层的自修复性能。线性扫描伏安法 (LSV) 和电化学阻抗谱 (EIS) 的结果证实，含有 5 wt% PPy@PDA 纳米颗粒的涂层具有更好的光致形状记忆效应、自修复性能、和其他含量的 PPy@PDA 纳米粒子的保护能力。此外，涂层的形状记忆效应应受金属基材腐蚀产物的影响。