In this paper, polyurethane (PU) with polyethylene glycol as a soft segment and isophorone diisocyanate as a hard segment were designed and synthesized. Copper complex (Cu(HD)₂) was synthesized in PU preparation, bringing excellent self-healing, photothermal and antibacterial properties. The content of Cu²⁺ accounted for less than 2wt% of PU elastomer. Cu(HD)₂ acted as a chain extender and provided coordination bonds for elastomer to promote the self-healing process. Experiments showed that Cu(HD)₂ exhibited excellent photothermal properties in PU. The maximum temperature of the samples after 5 min irradiation under a sunlight simulator could reach 120 °C. The results of the self-healing experiment showed that mechanical properties of PU could be recovered by nearly 90%, and electrochemical protection performance could be recovered by nearly 100%. Antibacterial experiments proved that PU could release Cu²⁺, forming an antibacterial ring around PU. PU has excellent application in the field of anticorrosion and antibacterial coatings.

本文设计合成了以聚乙二醇为软链段、异佛尔酮二异氰酸酯为硬链段的聚氨酯（PU）。在聚氨酯制备过程中合成了铜络合物(Cu(HD) ₂ )，具有优异的自愈、光热和抗菌性能。Cu ²⁺的含量占PU弹性体的不到2wt%。Cu(HD) ₂作为扩链剂并为弹性体提供配位键以促进自修复过程。实验表明，Cu(HD) ₂在 PU 中表现出优异的光热性能。在阳光模拟器下照射 5 分钟后样品的最高温度可达 120 ℃。自愈实验结果表明，PU的力学性能可恢复近90%，电化学保护性能可恢复近100%。抗菌实验证明PU可以释放Cu ²⁺，在PU周围形成抗菌环。PU在防腐、抗菌涂料领域有着极好的应用。