低表面能涂料在复合防腐涂层中的应用  

Application of low-surface-energy paint to anticorrosive composite coating

作　　者：苏毅 SU Yi(Power Station Equipment Branch of Harbin Fenghua Co.,Ltd.,China Aerospace Science and Industry Co.,Ltd.,Harbin 150036,China)

机构地区：[1]航天科工哈尔滨风华有限公司电站设备分公司,黑龙江哈尔滨150036

出　　处：《电镀与涂饰》2023年第14期77-83,共7页Electroplating & Finishing

摘　　要：以丙烯酸丁酯(BA)和甲基丙烯酸-2,3-环氧丙基酯(GMA)为主要成分,通过添加甲基丙烯酸十二氟烷庚酯(DFMA)参与共聚物反应,制备出含氟量不同的透明液体,并将其均匀涂布于预涂了无机硅酸富锌底漆和环氧云铁中间漆的马口铁表面制成复合涂层。采用扫描电镜(SEM)观察、傅里叶变换红外分析、接触角测量、附着力测试、耐化学试剂测试、差示扫描量热(DSC)等方法考察了含氟丙烯酸共聚物干膜的微观结构、疏水性和玻璃化转变温度,以及复合涂层的附着力和耐化学品性能。结果表明:增大预聚物中含氟单体的含量可使共聚后固化膜表面的水接触角大幅提高,最大可达111.97°,其表面能也不断下降,可低至20.251 mJ/m~2,从而获得良好的疏水性。复合涂层的附着力可达1级,耐10%硫酸、5%氯化钠和10%氢氧化钠溶液的性能良好。The copolymerization of butyl methacrylate(BA) and glycidyl methacrylate(GMA) was carried out with the addition of dodecafluoroheptyl methacrylate(DFMA).The transparent liquids produced with different contents of fluorine were uniformly coated on the tinplates pre-coated with inorganic silicate zinc-rich primer and micaceous iron oxide epoxy intermediate paint,forming a series of composite coatings.The microstructure,hydrophobicity,and glass transition temperature of the dried film of the fluorinated acrylate coating and the adhesion and chemical resistance of the composite coatings were studied by scanning electron microscopy(SEM),Fourier-transform infrared spectroscopy(FT-IR),contact angle measurement,adhesion testing,chemical resistance testing,and differential scanning calorimetry(DSC).The results showed that the increase in the content of fluorine-containing monomer in prepolymer increased the water contact angle of the copolymerized and cured film up to 111.97°,and its surface energy decreased with a minimum of 20.251 m J/m~2,indicating that it had good hydrophobicity.The composite coating had a 1-grade adhesion and good resistance to 10% sulfuric acid,5% sodium chloride,and 10% sodium hydroxide solutions.

关 键 词：含氟防污涂料 丙烯酸树脂 表面能 疏水性 附着力 耐化学品性 

分 类 号：TG174.461[金属学及工艺—金属表面处理] TQ639.2[金属学及工艺—金属学]