| 功能化纳米TiO2/环氧树脂超疏水防腐复合涂层的制备与性能 |
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| 引用本文： | 汪雨微,欧宝立,鲁忆,邢赟,罗子盈,支倩,曹新秀. 功能化纳米TiO2/环氧树脂超疏水防腐复合涂层的制备与性能[J]. 复合材料学报, 2021, 38(12): 3971-3985. DOI: 10.13801/j.cnki.fhclxb.20210309.001 |
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| 作者姓名： | 汪雨微 欧宝立 鲁忆 邢赟 罗子盈 支倩 曹新秀 |
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| 作者单位： | 1.湖南科技大学 材料科学与工程学院，湘潭 411201 |
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| 基金项目： | 国家自然科学基金面上项目(51775183)；湖南省自然科学基金项目(2021JJ30259)；清华大学摩擦学国家重点实验室开放基金项目(SKLTKF17B14)；国家级大学生创新创业项目(S202010534001S)；湖南省普通高等学校教学改革研究项目(湘教通[2019]291号)；湖南省大学生创新创业项目(S202010534033) |
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| 摘 要： | 超疏水材料在金属防腐领域具备巨大的潜在应用前景。为得到疏水性能及防腐性能俱优的纳米TiO2/环氧树脂复合涂层材料，首先以三甲氧基十七氟癸基硅烷和γ-氨丙基三乙氧基硅烷(KH550)对纳米TiO2表面功能化；以全氟辛基甲基丙烯酸酯对固化剂二乙烯三氨(DETA)进行氟化；最后通过一步共混法和两步喷涂法分别制备出两种复合涂层。利用FTIR、XPS、1HNMR分析氟化固化剂(F-DETA)和氟化纳米TiO2(f-TiO2)的物相组成和组织结构。接触角测试仪和静置实验表明，当三甲氧基十七氟癸基硅烷和γ-氨丙基三乙氧基硅烷的摩尔比为1∶15时f-TiO2的性能最佳，所制备的复合涂层接触角达到164.9°。SEM表征结果显示通过两步法制备的f-TiO2/环氧树脂复合涂层具备更均匀的粗糙表面、涂层内部孔隙率较低且环氧树脂层与f-TiO2层具备梯度结构。摩擦实验证明两步法制备的f-TiO2/环氧树脂复合涂层的超疏水性具备较好的机械稳定性。Tafel极化曲线和电化学阻抗谱(EIS)研究表明，通过两步法制备的f-TiO2/环氧树脂复合涂层具有优异的防腐性能，其腐蚀抑制效率高达99.99%。
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| 关 键 词： | 纳米TiO2 环氧树脂 超疏水 防腐蚀 复合涂层 |
| 收稿时间： | 2021-01-12 |
Preparation and properties of functionalized nano-TiO2/epoxy resin superhydrophobic anticorrosive composite coating |
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| Abstract: | Superhydrophobic materials have great potential application prospects in the field of metal anticorrosion. In order to obtain TiO2/epoxy resin composite coating material with excellent corrosion resistance, firstly, the surface of nano-TiO2 was modified with trimethoxy heptafluorodecyl silane and γ-aminopropyltriethoxysilane (KH550), and then the diethylenetriamine (DETA) as curing agent was fluorinated with perfluorooctyl methacrylate. Finally, two kinds of composite coatings were prepared by blending method and two-step method respectively. The phase composition and microstructure of fluorinated curing agent (F-DETA) and fluorinated nano TiO2 (f-TiO2) were analyzed by FTIR, XPS and 1HNMR. The contact angle tester and static test show that when the molar ratio of trimethoxyheptafluorodecyl silane to γ-aminopropyltriethoxysilane is 1∶15, the performance of f-TiO2 is the best. The contact angle of the composite coating reaches 164.9°. SEM was used to characterize the micro-morphology of the coating surface and cross-section. The results show that the f-TiO2/epoxy resin composite coating prepared by two-step method has uniform rough surface, low porosity inside the coating, and gradient structure between epoxy resin layer and f-TiO2 layer. The friction experiment proves that the super hydrophobicity of f-TiO2/epoxy resin composite coating prepared by two-step method has certain mechanical stability. Tafel polarization curve and electrochemical impedance spectroscopy (EIS) show that the f-TiO2/epoxy resin composite coating prepared by two-step method has excellent corrosion resistance, and its corrosion inhibition efficiency is as high as 99.99%. |
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