A novel composite nanocontainer is prepared by in-situ growth of zeolitic imidazolate framework-8 (ZIF-8), a typical metal organic framework, on ZnAl layered double hydroxides (LDH). The polyvinyl butyral (PVB) coatings embedded with LDH/ZIF-8 nanocontainers pre-loaded with 1H-benzotriazole exhibit both active and passive protection on copper substrates. The active protecting property is ensured by the trap of corrosive chloride of LDHs and the on-demand release of the pre-loaded corrosion inhibitors from ZIF-8. The passive protecting property is provided by the barrier capability of brucite-like layers of ZnAl LDH nanosheets. In addition, the excellent compatibility with PVB resin and the highly porous structure of the in-situ grown ZIF-8 on LDH substrate can also explain the excellent corrosion performance of the composite coatings.

通过在锌铝层状双氢氧化物（LDH）上原位生长沸石咪唑酯骨架-8（ZIF-8），一种典型的金属有机骨架，制备了一种新型复合纳米容器。嵌入预加载有 1H-苯并三唑的 LDH/ZIF-8 纳米容器的聚乙烯醇缩丁醛 (PVB) 涂层在铜基材上表现出主动和被动保护。LDHs的腐蚀性氯化物的捕集和ZIF-8预载缓蚀剂的按需释放确保了主动保护性能。被动保护性能由水镁石类锌层的阻挡能力提供Al LDH 纳米片。此外，与 PVB 树脂的优异相容性以及在 LDH 基材上原位生长的 ZIF-8 的高度多孔结构也可以解释复合涂层的优异腐蚀性能。