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以4-(4-羟基-苯基)-2H-二氮杂萘-1-酮(DHPZ)和2,6-二氟苯腈(DFBN)为反应物,通过芳香亲核取代反应合成数均分子量为3000的羟基封端的聚芳醚腈(PPEN-OH),再经二丙烯基醚化和硅氢加成反应合成桥连型硅氧烷产物(PPEN-Si),进而与二苯基硅二醇和十七氟癸基三甲氧基硅烷进行异官能团缩合反应,制备出含芳环桥连结构的氟硅杂化材料(PPEN-b-FPSO).考察了反应温度、反应时间等因素对各阶段反应的影响,并采用FTIR,1H-NMR和19F-NMR对结构进行表征,证明结构正确.以PPEN-b-FPSO为基体,添加50%氟硅烷修饰的纳米二氧化硅初步制备超疏水涂层.采用扫描电子显微镜测试涂层表面形貌,发现涂层表面具有微纳米级的粗糙结构,用光学接触角测量仪测试其水接触角最大为159°,表现出较好的疏水性能,涂膜的附着力为一级.
The number average molecular weight was calculated by aromatic nucleophilic substitution reaction with 4- (4-hydroxy-phenyl) -2H-phthalazin- 1-one (DHPZ) and 2,6- difluorobenzonitrile (DFBN) (PPEN-OH) with a molecular weight of 3000, and then the bridged siloxane product (PPEN-Si) was synthesized by dipropylene etherification and hydrosilylation reactions, and further reacted with diphenylsilyl Diol and heptadecafluorodecyltrimethoxysilane to prepare PPEN-b-FPSO with bridged aromatic ring structure.The effects of reaction temperature, reaction time and other factors The structure was characterized by FTIR, 1H-NMR and 19F-NMR, and the structure was correct.Using PPEN-b-FPSO as matrix, adding 50% fluorosilane modified nano-silica to prepare the superhydrophobic coating The scanning electron microscopy (SEM) was used to test the morphology of the coating surface, and the surface of the coating was found to have a micro-nano-scale roughness. The maximum water contact angle was 159 ° with an optical contact angle meter and showed good hydrophobicity. Film adhesion as a.