Layered double hydroxides (LDH) have irreplaceable advantages in the field of polymer flame retardancy, but their thermal stability and compatibility with matrix still need to be improved. In this paper, the bottom-up method is adopted, and the phosphorus series flame retardant triphenyl phosphate (TPP) was first encapsulated inside ZIF-67. On this basis, ZIF-67 was etched to produce LDH while modified by polydopamine (PDA) concomitantly. An organic coated polydopamine hollow cage lamellar LDH microstructure loaded with TPP was constructed, and its structure-performance relationship was verified. When 2 wt% TPP@LDH@Co-PDA was added to the epoxy resin, the LOI value of the composite was increased to 29.4 %, the peak heat release was reduced by 43.1 %, and the smoke release was significantly reduced. The unique microstructure endows epoxy composites with good flame retardancy, improves mechanical properties, and provides a new solution to the migration problem of phosphorous based flame retardants.

层状双氢氧化物（LDH）在聚合物阻燃领域具有不可替代的优势，但其热稳定性和与基体的相容性仍需提高。本文采用自下而上的方法，首先将磷系阻燃剂磷酸三苯酯（TPP）封装在ZIF-67内部。在此基础上，蚀刻ZIF-67产生LDH，同时用聚多巴胺（PDA）修饰。构建了负载TPP的有机涂层聚多巴胺空心笼层状LDH微结构，并验证了其结构-性能关系。当环氧树脂中添加2 wt%的TPP@LDH@Co-PDA时，复合材料的LOI值提高至29.4%，放热量峰值降低43.1%，发烟量显着降低。独特的微观结构赋予环氧复合材料良好的阻燃性，提高力学性能，为磷基阻燃剂的迁移问题提供了新的解决方案。