高防护性复合有机硅树脂涂层的制备及性能研究

Preparation and Properties of Highly Protective Composite Silicone Resin Coatings

摘要:

金属材料难以避免地会经常产生表面吸附与腐蚀，从而造成材料表面腐蚀失效，给生命安全与社会经济造成巨大的危害与损失，研发高效的金属表面防护涂层是一种关键技术手段。利用自由基共聚法，制备了兼具高疏水性与优异的防腐功能的有机硅-丙烯酸酯复合树脂材料。通过核磁共振氢谱、原子力显微镜、接触角以及腐蚀溶液浸泡等测试手段，对复合材料进行了化学结构、形貌及性能的测试和表征。研究结果表明：复合涂层的表面呈现典型的纳米级粗糙结构，分布着微纳米富硅储液池；复合树脂在金属表面成膜后可显示很高的疏水特性，其表面水滴的前进、后退接触角（θ_A，θ_R）分别为106和94 °，优异的疏水性能使其可应用于高效油水分离；该涂层对常见液体以及脱氮假单胞菌Pseudomonas sp均显示出优异的防吸附性能，特别是该复合树脂涂层还具有良好的抗酸、碱、盐腐蚀性和机械稳定性。上述结果表明，有机硅-丙烯酸酯复合树脂涂层在诸多领域均具有较高的应用潜力。

Abstract:

Surface adsorption and corrosion often inevitably occur on metal surfaces， which could cause materials failure， resulting in huge losses and harms to safety of life and social economy. The development of efficient surface protection coatings metal surfaces has always been a key technology. In this work， silicone-acrylate composite resin coatings with hydrophobic and anti-corrosion properties were successfully prepared by free radical copolymerization method. The structures， morphologis and properties of the composite were tested and characterized by nuclear magnetic resonance spectroscopy， atomic force microscopy， contact angle measurement and anti-corrosion tests. The results showed that the composite can exhibit high hydrophobicity after depositing on the metal surfaces， with the advancing and receding contact angles （θ_A， θ_R） of water droplets on the surface of ~106 ° and ~94 ° respectively. The composite coatings showed excellent anti-adsorption properties for common liquids and Pseudomonas sp. In particular， the composite coatings also had good corrosion resistance against acid， alkali and salt solution as well as high mechanical stability. The composite material coatings fabricated in this study have many potential applications.