十八胺改性纳米SiO2制备及在水性环氧防腐涂料中的应用

摘要：以正硅酸四乙酯（TEOS）、十六烷基三甲基溴化铵（CTAB）、γ-(2，3-环氧丙氧基)丙基三甲氧基硅烷（KH560）为原料，采用溶胶-凝胶法制备表面环氧基化的纳米SiO2，通过十八胺（ODA）的伯胺端基与纳米SiO2表面的环氧基进行反应得到ODA-SiO2，用于制备水性环氧防腐涂料。通过傅里叶变换红外光谱（FTIR）、热重测试（TG）、X射线光电子能谱仪（XPS）、扫描电镜（SEM）表征ODA成功接枝到SiO2表面；通过电化学测试、耐盐雾性能测试对水性环氧涂层的防腐性能进行了分析。结果表明，含0.3wt%ODA-SiO2的水性环氧涂层具有较好的防腐蚀性能，耐盐雾时间500h。

Preparation and Anticorrosion Performance of Octadecylamine Modified Nano-SiO2 Anticorrosive coating

Abstract: The surface epoxy nano SiO2 was prepared by sol-gel method using four tetraethyl orthosilicate (TEOS), sixteen alkyl three methyl ammonium bromide (CTAB), and gamma (2, 3- epoxprooxy) propyl trimethoxysilane (KH560) as raw materials. The ODA-SiO2 was prepared by affinity addition reaction of the primary amine end group of the eighteen amine (ODA) with the epoxy on the surface of the nano SiO2, and used for the preparation of waterborne epoxy. Anticorrosive coating. Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to characterize the successful grafting of ODA onto SiO2 surface. The corrosion resistance of waterborne epoxy coating was analyzed by electrochemical test and salt spray resistance test. The results show that the waterborne epoxy coating containing 0.3 wt% ODA-SiO2 has good corrosion resistance and salt spray resistance time is 500h.