Abstract A nanocomposite was fabricated with both excellent corrosion inhibitor encapsulating capacity and the ability of controlled delivery of benzotriazole (BTA) for simultaneously endowing coating systems with both active and passive anti-corrosion performances. The metal organic frameworks (MOFs) were synthesized and served as nanocontainers to load BTA. On this basis, tetraethyl orthosilicate (TEOS) was further added to form a film to wrap MOFs. The addition of TEOS endowed coatings with pH-responsive and active inhibition abilities, due to the film would break under acid or alkaline conditions. Moreover, the resultant compounds were further combined with graphene oxide (GO), cause GO had an superior barrier property and impermeability. On the other hand, there were abundant oxygen-containing functional groups on GO, which could be modified to improve the dispersion of GO in epoxy coatings. The fabricated nanocomposites were comprehensively characterized with Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Ultraviolet-visible spectroscopy (UV–vis) test was utilized to estimate the release behavior of BTA. Electrochemical Impedance Spectroscopy (EIS) was performed to characterize the corrosion behavior of various composite coatings. Results demonstrated that the BTA-MOF-TEOS-GO incorporated into the epoxy coatings showed the highest impedance values up to 8.6 × 108 Ω cm2, indicating the most excellent and durable anti-corrosion properties.

中文翻译：

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BTA-MOF-TEOS-GO纳米复合材料的制备赋予涂层系统主动抑制和持久防腐性能

摘要 制备了兼具优异缓蚀剂包封能力和苯并三唑（BTA）可控释放能力的纳米复合材料，同时赋予涂层体系主动和被动防腐性能。合成金属有机框架（MOF）并作为纳米容器来加载 BTA。在此基础上，进一步加入原硅酸四乙酯（TEOS）形成薄膜包裹MOFs。由于薄膜在酸性或碱性条件下会破裂，TEOS 的添加赋予了涂层具有 pH 响应和主动抑制能力。此外，所得化合物进一步与氧化石墨烯（GO）结合，使 GO 具有优异的阻隔性和不渗透性。另一方面，GO上有丰富的含氧官能团，可以对其进行改性以改善 GO 在环氧涂料中的分散。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、热重分析（TGA）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对制备的纳米复合材料进行了综合表征。紫外-可见光谱 (UV-vis) 测试用于评估 BTA 的释放行为。进行电化学阻抗谱 (EIS) 以表征各种复合涂层的腐蚀行为。结果表明，加入环氧树脂涂层的 BTA-MOF-TEOS-GO 显示出最高的阻抗值，高达 8.6 × 108 Ω cm2，表明其具有最出色和最持久的防腐性能。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、热重分析（TGA）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对制备的纳米复合材料进行了综合表征。紫外-可见光谱 (UV-vis) 测试用于评估 BTA 的释放行为。进行电化学阻抗谱 (EIS) 以表征各种复合涂层的腐蚀行为。结果表明，加入环氧树脂涂层的 BTA-MOF-TEOS-GO 显示出最高的阻抗值，高达 8.6 × 108 Ω cm2，表明其具有最出色和最持久的防腐性能。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、热重分析（TGA）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对制备的纳米复合材料进行了综合表征。紫外-可见光谱 (UV-vis) 测试用于评估 BTA 的释放行为。进行电化学阻抗谱 (EIS) 以表征各种复合涂层的腐蚀行为。结果表明，加入环氧树脂涂层的 BTA-MOF-TEOS-GO 显示出最高的阻抗值，高达 8.6 × 108 Ω cm2，表明其具有最出色和最持久的防腐性能。X 射线光电子能谱 (XPS) 和扫描电子显微镜 (SEM)。紫外-可见光谱 (UV-vis) 测试用于评估 BTA 的释放行为。进行电化学阻抗谱 (EIS) 以表征各种复合涂层的腐蚀行为。结果表明，加入环氧树脂涂层的 BTA-MOF-TEOS-GO 显示出最高的阻抗值，高达 8.6 × 108 Ω cm2，表明其具有最出色和最持久的防腐性能。X 射线光电子能谱 (XPS) 和扫描电子显微镜 (SEM)。紫外-可见光谱 (UV-vis) 测试用于评估 BTA 的释放行为。进行电化学阻抗谱 (EIS) 以表征各种复合涂层的腐蚀行为。结果表明，加入环氧树脂涂层的 BTA-MOF-TEOS-GO 显示出最高的阻抗值，高达 8.6 × 108 Ω cm2，表明其具有最出色和最持久的防腐性能。