首先通过化学接枝法将氧化石墨烯键合到氨基硅烷类偶联剂上,制得氨基硅烷改性氧化石墨烯,并借用红外光谱对其结构进行表征。然后用改性后的氧化石墨烯与4,4’-二氨基二环己基甲烷和马来酸二乙酯通过Michael加成反应制备聚天门冬氨酸酯树脂,并研究制备工艺对Michael加成反应的影响。采用氧化石墨烯改性聚天门冬氨酸酯树脂和脂肪族多异氰酸酯固化剂N3390制备聚脲涂料,并检测涂膜性能和电化学性能。结果表明:当马来酸酐乙酯与伯胺的物质的量比为1.85、氧化石墨烯用量为1.5%时,所制备的聚脲涂料具有良好的耐热性能和耐腐蚀性,能够满足金属防腐涂料的要求。

Firstly, graphene oxide(GO) was bonded to silane coupling agent(KH-550) through chemical grafting to synthesize amino-silanes modified graphene oxide, and its structure was characterized by FT-IR.The amino-silanes modified graphene oxide was then used to prepare modified polyaspartic ester(PAE) with 4, 4’-diaminodicyclohexylmethane(PACM) and diethyl maleate(DM) via Michael addition reaction. The effect of preparation technics on the addition reaction was studied. Moreover, the polyurea coating was prepared by GO modified PAE and aliphatic polyisocyanate curing agent N3390, and the performance and electrochemical performance of the films were tested. It was found that the polyurea films exhibited good heat resistance and resistance when the dosage of graphene oxide was 1.5%, and molar ratio of DM and PACM was 1.85. The results showed that polyurea coatings based on GO/PAE was expected to be used as metal anticorrosive coatings.