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TiO_(2)/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TiO_(2)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、^(1)HNMR分析氟化固化剂(F-DETA)和氟化纳米TiO_(2)(f-TiO_(2))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-TiO_(2)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-TiO_(2)/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-TiO_(2)层具备梯度结构。摩擦实验证明两步法制备的f-TiO_(2)/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-TiO_(2)/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%。
Superhydrophobic materials have great potential application prospects in the field of metal anticorrosion.In order to obtain TiO_(2)/epoxy resin composite coating material with excellent corrosion resistance,firstly,the surface of nano-TiO_(2) was modified with trimethoxy heptafluorodecyl silane andγ-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 TiO_(2)(f-TiO_(2))were analyzed by FTIR,XPS and ^(1)HNMR.The contact angle tester and static test show that when the molar ratio of trimethoxyheptafluorodecyl silane toγ-aminopropyltriethoxysilane is 1∶15,the performance of f-TiO_(2) 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-TiO_(2)/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-TiO_(2) layer.The friction experiment proves that the super hydrophobicity of f-TiO_(2)/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-TiO_(2)/epoxy resin composite coating prepared by two-step method has excellent corrosion resistance,and its corrosion inhibition efficiency is as high as 99.99%.
作者
汪雨微
欧宝立
鲁忆
邢赟
罗子盈
支倩
曹新秀
Yuwei WANG;Baoli OU;Yi LU;Yun XING;Ziying LUO;Qian ZHI;Xinxiu CAO(School of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China;Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation Technology(Hunan University of Science and Technology),Xiangtan 411201,China;Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion(Hunan University of Science and Technology),Xiangtan 411201,China;Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers(Hunan University of Science and Technology),Xiangtan 411201,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2021年第12期3971-3985,共15页
Acta Materiae Compositae Sinica
基金
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)。
作者简介
通讯作者:欧宝立,博士,教授,博士生导师,研究方向为自修复、防腐、超疏水、复合材料,E-mail:B.Ou@hnust.edu.cn。
