Abstract As people become more aware of the necessity and importance of environment protection and product safety, the environmentally friendly non-isocyanate polyurethane (NIPU) has received great attention. In this work, a series of NIPU anti-corrosion coatings were prepared by amine-terminated NIPU, tetraethyl orthosilicate (TEOS), and bisphenol A (BPA) epoxy. First, the BPA cyclic carbonate was synthesized from carbon dioxide and BPA epoxy resin. Then, the amine-terminated NIPU was synthesized from BPA cyclic carbonate and fatty acid amine. Next, the NIPU TEOS hybrid coatings were formulated by different amounts of TEOS. The anti-corrosion performance of NIPU TEOS hybrid coatings was evaluated by electrochemical impedance spectroscopy and salt spray. NIPU coating with 5 wt. % of TEOS showed the best anti-corrosion behavior while NIPU coating with 20 wt. % of TEOS exhibited the worst corrosion resistance. The resulting anti-corrosion difference was attributed to the organic/inorganic micro-phase separation, which was confirmed by scanning electron microscopy and energy dispersive X-ray spectroscopy. This study reveals the effect of TEOS on the anti-corrosion performance of environmentally friendly NIPU coatings.

中文翻译：

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防腐非异氰酸酯聚氨酯聚硅氧烷有机/无机杂化涂料

摘要 随着人们越来越意识到环境保护和产品安全的必要性和重要性，环保型非异氰酸酯聚氨酯（NIPU）受到了极大的关注。在这项工作中，以胺封端的NIPU、原硅酸四乙酯（TEOS）和双酚A（BPA）环氧树脂制备了一系列NIPU防腐涂料。首先，BPA环状碳酸酯由二氧化碳和BPA环氧树脂合成。然后，以双酚A环状碳酸酯和脂肪酸胺为原料合成了端胺基NIPU。接下来，NIPU TEOS混合涂料由不同数量的TEOS配制而成。NIPU TEOS混合涂层的防腐性能通过电化学阻抗谱和盐雾评估。NIPU 涂层，重量为 5。％的 TEOS 表现出最好的防腐性能，而 NIPU 涂层与 20 wt. ％的 TEOS 表现出最差的耐腐蚀性。由此产生的防腐差异归因于有机/无机微相分离，这通过扫描电子显微镜和能量色散 X 射线光谱仪得到证实。本研究揭示了TEOS对环保NIPU涂料防腐性能的影响。