为改善传统环氧基船用防腐涂料易老化开裂的缺陷，制备2种高性能的环氧树脂防腐涂料，并对其防腐机理进行分析。分别以香草醛接枝壳聚糖和石墨烯为改性剂，对环氧树脂涂料进行改性，并对涂层的附着力、耐盐溶液腐蚀性和耐候性进行了表征。利用分子动力学模拟分析了水分子在改性前后环氧树脂模型中的扩散行为。2种改性剂的加入均可以有效地提升漆膜的附着力和耐候性；石墨烯涂层的耐盐溶液腐蚀性能最好，壳聚糖涂层次之，纯环氧对照组最差。分子动力学模拟证明改性剂的加入可以有效的抑制水分子的扩散，进而提高涂层的耐腐蚀性。
To improve the aging and cracking defects of traditional epoxy-based marine anti-corrosion coatings, two high-performance epoxy resin anti-corrosion coatings were prepared, and their anti-corrosion mechanism was analyzed. The epoxy resin coating was modified with chitosan grafted vanillin or graphene as modifiers. The coating properties were characterized by adhesion, salt solution resistance, and weather resistance experiments. The diffusion behavior of water molecules in the epoxy resin model before and after modification was analyzed using molecular dynamics simulations. The addition of the two modifiers could effectively improve the adhesion and weather resistance of the coatings. The graphene-modified coating has the best performance, chitosan modified coating is second, and the pure epoxy control group is the worst. Molecular dynamics simulations proved that the addition of modifiers could effectively inhibit the diffusion of water molecules, thereby improving the corrosion resistance of the coating.
2022,44(13): 90-95 收稿日期：2021-10-14
DOI：10.3404/j.issn.1672-7649.2022.13.021
分类号：U672.72
基金项目：国家自然科学基金青年科学基金资助项目（11902099）
作者简介：谢芳(1985-),女,博士,讲师,研究方向为船舶腐蚀与防护技术、智能材料
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