共价和非共价接枝氧化石墨烯纳米片改善水性聚氨酯涂料的耐腐蚀性。,ACS Omega

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共价和非共价接枝氧化石墨烯纳米片改善水性聚氨酯涂料的耐腐蚀性。
ACS Omega ( IF 3.7 ) Pub Date : 2019-11-18 , DOI: 10.1021/acsomega.9b02687
Jian-Gong Wen ₁ , Wenming Geng ₂ , Hong-Zhang Geng ₁ , Hui Zhao ₁ , Li-Chao Jing ₁ , Xiao-Tong Yuan ₁ , Ying Tian ₁ , Tao Wang ₁ , Yu-Jie Ning ₁ , Lei Wu ₁

Affiliation

通过将氧化石墨烯（GO）与异佛尔酮二异氰酸酯和N，N-二甲基乙醇胺共价接枝，然后将GO与十二烷基苯磺酸钠进行非共价接枝，来制备两亲性石墨烯衍生物。从红外光谱，X射线光电子能谱，热重分析和X射线衍射分析获得的结果表明，短链已成功接枝到GO的表面。随后，扫描电子显微镜和光学显微镜结果表明，改性GO（IP-GO）具有比GO最佳的分散性和相容性，并且在水性聚氨酯基质中具有降低的GO含量。讨论了复合涂层的耐蚀性与石墨烯衍生物的分散性以及石墨烯衍生物与聚合物基体相容性之间的关系。通过电化学阻抗谱分析和盐雾测试对防腐性能进行了表征。通过一系列的防腐测试，得出的结论是，具有0.3 wt％IP-GO的复合涂层的防腐性能得到了显着改善。优异的防腐性能归因于IP-GO在水性聚氨酯中的完美分散性和良好的相容性。结论是，具有0.3wt％IP-GO的复合涂层的防腐性能得到显着改善。优异的防腐性能归因于IP-GO在水性聚氨酯中的完美分散性和良好的相容性。结论是，具有0.3wt％IP-GO的复合涂层的防腐性能得到显着改善。优异的防腐性能归因于IP-GO在水性聚氨酯中的完美分散性和良好的相容性。

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Improvement of Corrosion Resistance of Waterborne Polyurethane Coatings by Covalent and Noncovalent Grafted Graphene Oxide Nanosheets.

The amphiphilic graphene derivative was prepared by covalent grafting of graphene oxide (GO) with isophorone diisocyanate and N,N-dimethylethanolamine and then noncovalent grafting of GO with sodium dodecylbenzenesulfonate. The results obtained from infrared spectroscopy, X-ray photoelectron spectroscopy, thermal gravimetric analysis, and X-ray diffraction analysis revealed that the short chains were successfully grafted onto the surface of GO. Subsequently, scanning electron microscopy and optical microscopy results showed that the modified GO (IP-GO) has the best dispersibility and compatibility than GO and reduced GO in the waterborne polyurethane matrix. The relationship between the corrosion resistance of composite coatings and the dispersibility of the graphene derivative and the compatibility of the graphene derivative with a polymer matrix were discussed. The anticorrosive properties were characterized by electrochemical impedance spectroscopy analysis and salt spray tests. Through a series of anticorrosion tests, it is concluded that the anticorrosion performance of a composite coating with 0.3 wt % IP-GO is significantly improved. The excellent anticorrosion performance is due to the perfect dispersion and good compatibility of IP-GO in waterborne polyurethane.

更新日期：2019-12-03

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