本发明公开了一种光热、pH响应的自修复防腐涂层及其制备方法和应用，属于腐蚀防护技术领域。本发明首先在还原氧化石墨烯表面生长二氧化硅纳米颗粒（rGO?SIO2），将其作为缓蚀剂载体；之后在负载了缓蚀剂的rGO?SIO2表面修饰具有pH敏感性的响应物质。将上述载药微胶囊加入涂层中，可以通过pH响应和光热响应加速缓蚀剂释放，抑制涂层破损处的腐蚀反应，实现涂层的自修复功能，有助于提升涂层的长效服役性能，具有广阔的应用前景。

The present invention discloses a self repairing anti-corrosion coating with photothermal and pH response, as well as a preparation method and application thereof, belonging to the field of corrosion protection technology. The present invention first grows silica nanoparticles (rGO/SIO2) on the surface of reduced graphene oxide as a corrosion inhibitor carrier; Afterwards, pH sensitive responsive substances were modified on the surface of rGO/SIO2 loaded with corrosion inhibitors. Adding the aforementioned drug loaded microcapsules to the coating can accelerate the release of corrosion inhibitors through pH response and photothermal response, suppress corrosion reactions at the damaged area of the coating, and achieve the self-healing function of the coating, which helps to improve the long-term service performance of the coating and has broad application prospects.