Preparation and properties of waterborne polyaniline/versatate-fluoro-acrylate composite anticorrosion coatings
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摘要: 为研究水性聚苯胺/叔氟丙烯酸酯(PANI/VFAc)复合涂层对Q235钢防腐蚀性能的影响,首先,以叔碳酸乙烯酯(Veova 10)和甲基丙烯酸十二氟庚酯(DFMA)为功能单体合成了VFAc乳液,并将其与PANI乳液混合后涂刷在Q235钢表面,制备了PANI/VFAc复合涂层;然后,采用TEM和FTIR对VFAc的结构进行了表征,采用XPS和接触角(CA)研究了复合涂层的表面性能,采用电化学方法研究了不同改性丙烯酸酯乳液对复合涂层防腐蚀性能的影响。结果表明:PANI/VFAc复合涂层的水接触角为97.56°,湿附着力等级为0,涂层表现出较好的疏水性;其腐蚀电流密度为8.72×10-8 A·cm-2,电化学阻抗达到106 Ω·cm2。所得结论表明PANI/VFAc复合涂层对Q235钢具有良好的防腐蚀性能。Abstract: In order to investigate the effects of waterborne polyaniline/versatate-fluoro-acrylate (PANI/VFAc) composite coating on anticorrosion performance of Q235 steel, VFAc emulsion was synthesized firstly by using versatate (Veova 10) and dodecafluoroheptyl methacrylate (DFMA) as the functional monomers, and after mixed with PANI emulsion, it was applied to the surface of Q235 steel to prepare PANI/VFAc composite coatings. Then, the structure of VFAc was characterized by TEM and FTIR, the surface performance of composite coatings was evaluated by XPS and contact angle (CA), and the influences of different modified acrylate emulsions on the anticorrosion performances of the composite coatings were investigated by electrochemical method. The results show that the water contact angle of PANI/VFAc composite coating is 97.56°, the grade of wet adhesion is 0, which means the coating shows preferable hydrophobicity. The corrosion current density is 8.72×10-8 A·cm-2, and the electrochemical impedance reaches 106 Ω·cm2. The conclusions obtained show that PANI/VFAc composite coating has preferable anticorrosion performance for Q235 steel.
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Keywords:
- polyaniline /
- versatate-fluoro-acrylate /
- waterborne /
- polymer-matrix composites /
- corrosion
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期刊类型引用(8)
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