本发明公开了一种具有智能可控缓蚀效果的生物基环氧复合涂料及其制备方法与应用，包括聚多巴胺包裹的负载铈离子的二维纳米材料0 .1～1 .0份、环氧树脂50～80份、植物多烯酚缩水甘油醚20～50份、酚醛胺环氧固化剂40～50份、消泡剂0 .01～0 .2份、流平剂0 .03～0 .3份、防沉剂0 .05～0 .2份、丙酮0 .05～0 .1份。本发明在酸性条件下采用一步法快速制备得到聚多巴胺包裹的负载铈离子的二维纳米材料，并将其作为填料添加入环氧树脂中得到长期防腐的复合涂层。本发明制备的复合涂层中的聚多巴胺有效改善了二维纳米材料与酚醛胺环氧固化剂的相容性，同时二维纳米材料作为填料有效提升环氧树脂基体的阻隔性能。本发明制备的复合涂层在相应pH条件下对负载的铈离子具有缓蚀效果，且释放铈离子的速率智能、可调控。

The present invention discloses a bio based epoxy composite coating with intelligent and controllable corrosion inhibition effect, a preparation method and application thereof, comprising a two-dimensional nanomaterial loaded with cerium ions wrapped in polydopamine in 0.1-1.0 parts, an epoxy resin in 50-80 parts, a plant polyphenol glycidyl ether in 20-50 parts, a phenolic amine epoxy curing agent in 40-50 parts, a defoamer in 0.01-0.2 parts, a leveling agent in 0.03-0.3 parts, and an anti settling agent in 0.05-0.2 parts Acetone 0.05-0.1 parts. The present invention utilizes a one-step method to rapidly prepare a two-dimensional nanomaterial loaded with cerium ions wrapped in polydopamine under acidic conditions, and adds it as a filler into epoxy resin to obtain a long-term anti-corrosion composite coating. The polydopamine in the composite coating prepared by the present invention effectively improves the compatibility between two-dimensional nanomaterials and phenolic amine epoxy curing agents, and at the same time, two-dimensional nanomaterials as fillers effectively enhance the barrier performance of the epoxy resin matrix. The composite coating prepared by the present invention has a corrosion inhibition effect on the loaded cerium ions under corresponding pH conditions, and the rate of cerium ion release is intelligent and controllable.