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氨基化氧化石墨烯在水性防腐防火一體化涂料中的應用

2021-05-06 16:30:40 作者：王娜來源：材料研究學報分享至：

摘要

用Hummers法制備氧化石墨烯（GO），并用乙二胺對氧化石墨烯（GO）進行氨基化得到氨基化氧化石墨烯（NGO），將季戊四醇磷酸酯（PEPA）、三聚磷酸鋁（ATP）與NGO三者復配并添加到水性環氧樹脂中，制備出水性環氧防腐防火一體化涂料。使用IR、XRD、SEM等手段對GO和NGO的結構和形貌進行了表征。結果表明，已經制備出GO并成功地對其表面實現了氨基化改性。電化學測試、鹽霧試驗、耐火極限測試、殘炭形貌分析和熱失重分析的結果表明，顏基比P/B=0.2的復合涂層具有最佳的防腐性能和防火性能。

關鍵詞：材料失效與保護 ; 水性環氧樹脂 ; 電化學阻抗譜 ; 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