抗污透明氟硅共聚物涂层的制备及性能

Preparation and Properties of Anti-smudge Transparent Copolymer Coatings Bearing Fluorosilicone

摘要:

为了探索制备方法简单的抗污涂层，利用溶液聚合法合成了具有低表面能的含氟无规共聚物，即聚[2-(全氟辛基)乙基甲基丙烯酸酯-r-3-(丙烯酰氧基)丙基三甲氧基硅烷]（PFOEMA-r-APTMS）以及聚[2-(全氟辛基)乙基甲基丙烯酸酯-r-甲基丙烯酰氧基丙基三乙氧基硅烷] （PFOEMA-r- MPTES）。它们被配制成不同浓度的溶液并喷涂到玻璃表面制备成抗污涂层。利用红外光谱（FTIR）以及核磁共振（1H NMR）表征了聚合物的化学结构，利用耐磨仪、接触角测试仪、原子力显微镜（AFM）等表征方法，探讨了单体种类和摩尔比、聚合物溶液浓度以及处理湿度对涂层性能的影响。结果表明，PFOEMA-r-MPTES比PFOEMA-r-APTMS涂层的耐磨性好很多，氟硅单体最佳投料比为1.5，聚合物浓度为10 mg/mL时，处理湿度为60%时，涂层疏水性最好且有较好的抗污垢性能，而且涂层具有较高的透明度和较好耐磨性。

Abstract:

In order to explore a simple method for preparing an anti-smudge coating. Herein, two fluorinated binary random copolymers with low surface energy was synthesized by solution polymerization. They are Poly [2-(Perfluorooctyl)ethyl methacrylate–r-3-Acryloxypropyl Trimethoxysilane](PFOEMA-r-APTMS) and Poly[2-(Perfluorooctyl)ethyl methacrylate-r-3-(Methacryloxy)propyltriethoxysilane](PFOEMA-r-MPTES), respectively. They were diluted into different concentration solution and sprayed onto glass surface to prepare anti-smudge coatings. The chemical structure of the polymer was characterized by combination of infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H NMR). The surface roughness was measured by atomic force microscopy (AFM), the water contact angle and wear resistance of coatings was also measured. Meanwhile, the relationship between contact angle and the concentration of the polymer solution, as well as the wear resistance, transparency and anti-smudge performance of the coatings under different humidity were studied. The results showed that the wear resistance of coating coated with PFOEMA-r-MPTES was much better than that coated with PFOEMA-r-APTMS. When the mole ratio of PFOEMA to MPTES was 1.5, the dilution concentration of copolymer was 10 mg/mL and the glass treatment humidity was 60%, the glass coated with PFOEMA-r-MPTES shown the best anti-smudge performance, hydrophobicity, wear resistance, as well as high transparency.