SBA-15改性石墨烯环氧复合涂层制备及其防腐性能

Preparation and its anticorrosive properties of SBA-15 modified graphene epoxy composite coating

摘要:

用γ-氨丙基三乙氧基硅烷（KH-550）将SBA-15分子筛接枝到石墨烯上制备功能填料，并将其填充到水性环氧树脂中制备复合涂层。采用红外光谱（FTIR）、氮气吸附脱附和透射电镜（TEM）对填料进行表征；采用电化学阻抗谱（EIS）、盐雾试验和附着力测试等方法对不同填料添加量涂层的防腐性能及力学性能进行表征。实验结果表明，当功能填料添加质量为1.0%时，涂层具有最佳的电化学性能、耐盐雾性能、以及附着力性能。复合涂层的防腐性能明显优于纯环氧涂层，因为功能填料的孔/片协同结构有效的延缓了腐蚀粒子到达金属基材表面的时间。

Abstract:

The SBA-15 molecular sieve was grafted onto the graphene to prepare the functional filler. Which was applied in water-based epoxy resin. The filler was characterized by fourier transform infrared spectroscopy, nitrogen adsorption–desorption isotherms and transmission electron microscopy. The corrosion resistance and mechanical properties of the coating with different amount of filler were characterized by electrochemical impedance spectroscopy (EIS), salt spray test and adhesion test. The experimental results showed that when adding 1.0% functional filler, the coating had the best electrochemical performance, salt spray resistance and adhesion performance. The anticorrosive property of the composite coating was superior to that of pure epoxy coating, due to the pore/sheet synergistic of the functional filler added. The time of corrosion particles to the surface of the metal substrate was delayed effectively.