Preparation of Hexagonal Boron Nitride Loaded Nano-alumina Composite Fillers and the Utility in Modifying Epoxy Corrosion Inhibition Coatings
YAN Shujun1, TAN Yali2,*, PANG Zhongrong1, WAN Pengying2,3, QI Fugang2,3
1 National Energy Group Ningxia Coal Industry Co., Ltd., Yinchuan 750001, China 2 Hunan Bangzer Technology Co., Ltd., Xiangtan 411100, Hunan, China 3 School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
Abstract: A novel PDA-BN@f-Al2O3 nanohybrid was synthesized by depositing Al2O3 nanoparticles modified with γ-aminopropyl triethoxysilane (KH550) on the surface of hexagonal boron nitride (h-BN) sheets covered by polydopamine (PDA). Then the PDA-BN@f-Al2O3 hybrids was dispersed in epoxy resin to prepare composite coating samples. Various characterizations revealed that PDA-BN@f-Al2O3 hybrids showed good dispersibility in the epoxy resin, and had a corrosion inhibitive performance. The epoxy coating added with 1wt% PDA-BN@f-Al2O3 hybrids exhibited satisfactory performances of medium blocking and long-term corrosion resistance, as it achieved an impedance modulus in low frequency region (|Z|0.01 Hz) three-order-magnitude higher than that of the pure epoxy coating and an improvement in flexibility.
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