含氟碳聚丙烯酸酯乳液疏水涂层的研究

Study of Hydrophobic Coatings of Fluorine-containing Acrylate

以丙烯酸六氟丁酯为疏水功能单体,与甲基丙烯酸甲酯、苯乙烯等单体共聚,合成了系列粒径不等、玻璃化转变温度(Tg)不同、核壳结构不同的含氟碳聚丙烯酸酯乳液,并测定了各自成膜后的接触角。将粒径不等、Tg不同的乳液复配、核壳结构不同的乳液复配,并测定了复配物成膜后的接触角,讨论了它们可能产生的二元协同作用。结果表明,含氟碳聚丙烯酸酯乳液疏水涂层可产生符合Wenzel方程的微纳米级别的粗糙面。通过SEM表征,观测到了这些微纳米粗糙面结构,其接触角超出了单组分含氟碳聚丙烯酸酯乳液涂层的接触角,最大水动态水接触角达到125.05°,静态水接触角达到130°;还观测到以大量保护胶为壳的核壳结构乳液在成膜时产生了核壳剥离自组装行为,同样产生了二元协同的粗糙面。

A series of acrylate copotymer latex with different sizes of particles, glass transition temperatures（Tg） and core-shell structures were synthesized by copolymerization of methyl methacrylate and styrene in presence of functional monomer hexafluorobutyl acrylate. The contact angle of the copolymer coatings were measured. The contact angle of complex coatings composed by latexes with different sizes of particles, glass transition temperature（Tg） and core-shell structure were measured and the effect of binary collaboration was also discussed. The result showed that the micro-nano rough structure fulfilled the Wenzel equation. This micro-nano rough structure could be seen by scanning electronic microscope （SEM）. Its contact angle was bigger than that of single fluorine-containing acrylate copolymer. The biggest dynamic advanced angle of coatings was 125.05° and the static contact angle was 130°. The desquamation and assembling of core-shell latex accompanied with binary collaboration rough structure appeared when it filmed.