氨基化氧化石墨烯在水性防腐防火一体化涂料中的应用

2021-05-06 16:30:40 作者：王娜来源：材料研究学报分享至：

摘要

用Hummers法制备氧化石墨烯（GO），并用乙二胺对氧化石墨烯（GO）进行氨基化得到氨基化氧化石墨烯（NGO），将季戊四醇磷酸酯（PEPA）、三聚磷酸铝（ATP）与NGO三者复配并添加到水性环氧树脂中，制备出水性环氧防腐防火一体化涂料。使用IR、XRD、SEM等手段对GO和NGO的结构和形貌进行了表征。结果表明，已经制备出GO并成功地对其表面实现了氨基化改性。电化学测试、盐雾试验、耐火极限测试、残炭形貌分析和热失重分析的结果表明，颜基比P/B=0.2的复合涂层具有最佳的防腐性能和防火性能。

关键词：材料失效与保护 ; 水性环氧树脂 ; 电化学阻抗谱 ; 氨基化氧化石墨烯 ; 防腐防火涂料

Abstract

The graphene oxide （GO） was prepared by the Hummers method, and then modified with ethylenediamine to obtain aminated graphene oxide （NGO）。 The anti-corrosion and fire-proof waterborne epoxy composite coating was prepared by adding pentaerythritol phosphate （PEPA）， aluminum triphosphate （ATP） and NGO to the waterborne epoxy resin, and then applied on the surface of steel sheet by air spraying method. The structure and morphology of GO and NGO were characterized by IR, XRD and SEM. The performance in anti-resistance and fire-proof resistance of the prepared coatings with different color ratios （pigment/resin ratio: P/B） was further investigated by means of electrochemical test, salt spray test, fire resistance test, residual carbon morphology analysis and thermogravimetric analysis. The results show that the composite coating with the P/B ratio of 0.2 presents the best comprehensive performance in anti-resistance and fire-proof.

Keywords： materials failure and protection ; waterborne epoxy resin ; chemical impedance spectroscopy ; aminated graphene oxide ; anti-corrosion and fire-retardant coating