含氟硅低表面能共聚物的制备与表征

Preparation and Characterization of Copolymer Containing Fluorine-Silicon with Low Surface Energy

将丙烯酸六氟丁酯和γ-甲基丙烯酰氧基丙基三甲氧基硅烷与(甲基)丙烯酸(酯)进行共聚,合成含氟硅共聚物。用红外光谱(FT-IR)、X射线光电子能谱(XPS)和热重分析(TGA)对共聚物的结构和性能进行表征,并测试了共聚物膜的吸水率及对水和油的接触角。XPS结果表明,共聚物膜表面的F和Si元素相对物质的量明显高于150 nm深处,同时共聚物膜对水和油的静态接触角分别达到110°和80°以上,说明F、Si元素自组装迁移,形成了低表面能表面;TGA研究结果表明,共聚物膜的热分解温度从195℃提高到226℃,升温过程中分解速率明显降低。该含氟硅共聚物具有良好的热稳定性、低的吸水率和良好的疏水防污性。

In this paper,the copolymer containing fluorine-silicon was prepared by solution polymerization with hexafluorobutyl acrylat,γ-（trimethoxysilyl） propyl methacrylate and acrylic monomers.The structure and properties of the copolymer were characterized by FT-IR,XPS and TG.Furthermore the contact angles of water and oil on the film of the copolymer containing fluorine-silicon and its water absorption were tested.XPS analysis shows that the content of fluorine and silicon in the surface of film is more than that in the film about the depth of 150 nm.The contact angles of water and oil on the film of the copolymer are higher than 110° and 80°,respectively TGA curves indicate the Td of copolymers increases from 195 ℃ to 226 ℃ when fluorine and silicon are introduced into the acrylate copolymer.The results show that the copolymer containing fluorine-silicon possesses good thermal stability,low water absorption and excellent water and oil resistant.