硅烷改性氟化石墨烯对环氧涂层防腐性能的影响,Journal of Applied Polymer Science

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硅烷改性氟化石墨烯对环氧涂层防腐性能的影响
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-01-17 , DOI: 10.1002/app.53637
Xiuzhou Lin _{1,

2} , Xulei Chen ₁ , Shixiong Zhao ₁ , Baojie Dou _{1,

2} , Qiang Peng ₁ , Zhiqiang Deng ₁ , Wilfred Emori _{1,

2} , Xiulei Gao ₃ , Zhiwen Fang ₃

Affiliation

氟化石墨烯（FG）是石墨烯的衍生物，具有优异的绝缘性能，然而，FG在有机涂料中的分散性能在防腐应用中仍然是一个挑战。本研究旨在提出一种简单的策略来有效改善 FG 的分散性，以增强其与环氧树脂的界面相容性。FG 用含氨基的 3-氨丙基三乙氧基硅烷 (APTES) 和环氧封端的 3-缩水甘油氧基丙基三甲氧基硅烷 (GPTMS) 进行了改性。FG 和硅烷改性 FG 的化学成分和微观结构得到有效表征。此外，系统地研究了FG和硅烷改性FG改性环氧涂层的耐腐蚀性能和防腐机理，结果表明，硅烷偶联剂有效改善了FG在环氧涂料中的分散性，增强了FG与环氧树脂的界面相互作用，从而提高了环氧涂料的阻隔性能，阻止了腐蚀性介质的渗透。电化学和摩擦学分析表明，APTES 改性的 FG (AFG) 涂层比 GPTMS 改性的 FG (GFG) 涂层表现出更好的防腐性能，这归因于其交联密度和阻隔性能的提高。 AFG 和环氧树脂上的氨基。

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Effect of silane-modified fluorinated graphene on the anticorrosion property of epoxy coating

Fluorinated graphene (FG) is a derivative of graphene with excellent insulating properties, however, the dispersion performance of FG in organic coatings is still a challenge in anti-corrosion applications. This study aims to propose a simple strategy to effectively improve the dispersion of FG towards enhancing its interfacial compatibility with epoxy resins. FG was modified with amino-containing 3-aminopropyl triethoxysilane (APTES) and epoxy terminated 3-glycidoxypropyl trimethoxysilane (GPTMS). The chemical compositions and microstructures of FG and the silane-modified FGs were effectively characterized. Moreover, the corrosion resistance and anticorrosion mechanisms of the epoxy coatings modified by FG and silane-modified FG were systematically studied, and the results showed that the silane coupling agent effectively improved the dispersion of FG in the epoxy coating and enhanced the interface interaction between FG and the epoxy resin, thereby improving the barrier properties of the epoxy coating and preventing the penetration of the corrosive medium. Electrochemical and tribological analyses showed that the APTES-modified FG (AFG) coating exhibited better anti-corrosion properties than the GPTMS-modified FG (GFG) coating, which is attributed to the improvement of its crosslinking density and barrier properties by the reactions between the amino groups on AFG and the epoxy resin.

更新日期：2023-01-17

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