中文摘要：

采用自由基溶液聚合与溶胶-凝胶法相结合的方法制备了含氟高分子/SiO2杂化疏水材料.通过甲基丙烯酸十二氟庚酯（FA）与乙烯基三乙氧基硅烷（VTES）共聚合成了含氟硅共聚物（PFAS）,进一步通过原硅酸乙酯（TEOS）与PFAS共聚物溶液共水解缩聚制备了具有含氟侧基的碳碳主链高分子和硅氧网络的含氟高分子/SiO2杂化疏水材料.研究结果表明,SiO2组分含量提高可以显著增加杂化材料薄膜的涂敷厚度,改善其耐久性能,而对杂化材料疏水性能的影响不大.

英文摘要：

Fluorinated organic-inorganic hybrid materials were prepared using fluorine-containing monomers,silicone-containing monomers and tetraethyl orthosilicate by free-radical random copolymerization and sol-gel process,and applied as functional coatings onto aluminium alloy substrates.The fluorine-containing monomer used was dodecafluoroheptyl methyl acrylate（FA）,and silicone-containing monomer used was vinyltriethoxy silane（VTES）.Tetraethyl orthosilicate（TEOS） was added to pre-polymerized FA-co-VTES（PFAS） solution to co-hydrolyze and co-condense with different addition values.The influence of inorganic component content（TEOS） on the physical properties of the coating films were characterized by FTIR,TGA,GPC,SEM,and XPS.The surface free energies of fluorinated organic-inorganic hybrid materials prepared were estimated from the contact angle data measured by sessile-drop method.Transparent coating films with smooth surface and uniform thickness could be obtained by the dip coating technique.FTIR and XPS results indicated that,owing to the strong electronegativity of the fluorine atoms,hydrophobic perfluoroalkyl groups were preferentially enriched to the outermost layer at the coating film-air interface,and three layers probably existed in the coating film.The upper layer oriented toward the air was composed of mainly perfluoroalkyl groups originating from FA,the intermediate layer was composed of hydrocarbon backbone chain originating from vinyl polymerization,and the bottom layer was composed of mainly —O—Si—O？ ？network originating from TEOS.The fluorinated organic-inorganic hybrid materials prepared were very hydrophobic and exhibited excellent water repellency.It was demonstrated that the water repellency properties of PFAS/SiO2 hybrid materials was governed by hydrophobic perfluoroalkyl groups of the outermost layer.The contact angles of the coating films for water and methylene iodide were extremely high,at 120.9° and 93°,respectively,for TEOS/FA mole ratios at 1∶1,and their surfa