Abstract

Poly (urethane-glutaric-esteramide) (PUGEA) was synthesized using corn oil and glutaric acid and further treated with toluene-2, 4-diisocyanate. Fumed silica with 1, 2, and 3 weight percentage was included in the synthesized PUGEA resin to obtain PUGEA-1, PUGEA-2 and PUGEA-3 nanocomposite resins, respectively. The chemical structure of glutaric polyesteramide and PUGEA was characterized by Fourier-transform infrared spectroscopy and nuclear magnetic resonance (¹H and ¹³C NMR). The morphology, hydrophobicity and thermal stability of the PUGEA nanocomposites were investigated by using scanning electron microscopy and energy-dispersive X-ray spectroscopy, by measuring contact angle and by thermogravimetric analysis (TGA). Afterward, the PUGEA/fumed silica nanocomposite coatings were applied on mild steel and dried at room temperature, and they were physico-mechanically characterized by measuring their scratch and pencil hardness, bending, impact resistance and cross-hatch adhesion. The anti-corrosion effectiveness of PUGEA-2 was investigated by electrochemical impedance spectroscopy immersing it for 42 days in a 3.5 wt% NaCl aqueous solution. Finally, TGA reveals that the PUGEA-3 nanocomposite coating can be safely used up to 275 °C.

中文翻译：

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玉米油衍生的聚（氨基甲酸乙酯-戊二酸-酯酰胺）/气相二氧化硅纳米复合涂料，用于防腐​​应用

摘要

使用玉米油和戊二酸合成聚（氨基甲酸酯-戊二酸酯酰胺）（PUGEA），并进一步用甲苯-2，4-二异氰酸酯处理。在合成的PUGEA树脂中包含重量百分比为1、2和3的气相二氧化硅，分别获得PUGEA-1，PUGEA-2和PUGEA-3纳米复合树脂。戊二酸聚酯酰胺和PUGEA的化学结构通过傅里叶变换红外光谱和核磁共振（¹ H和¹³1 H NMR）。PUGEA纳米复合材料的形态，疏水性和热稳定性通过使用扫描电子显微镜和能量色散X射线光谱法，通过测量接触角和通过热重分析（TGA）进行了研究。然后，将PUGEA /气相二氧化硅纳米复合涂料涂覆在低碳钢上并在室温下干燥，然后通过测量其划痕和铅笔硬度，弯曲度，耐冲击性和划格法附着力对其进行物理机械表征。通过电化学阻抗光谱法将PUGEA-2浸入3.5 wt％的NaCl水溶液中42天，研究其防腐效果。最后，TGA显示，PUGEA-3纳米复合涂料可以在高达275°C的温度下安全使用。