New fluorinated coatings were obtained by using a perfluoropoly ether product (PFEUMA) having the following structure: CF_3CF_2O(CF_2CF_2O)_m(CF_2O)_nCF_2CH_2OCONHCH_2CH_2OCOC(CH_3)=CH_2 where m/n=2 and M_n =1079 The fluorinated coatings prepared were of two types: 1. cured films, obtained by photopolymerisation of PFEUMA added to a typical UV-curable resin (Bisphenol A bis-ethylether diacrylate) 2. thermoplastic films, obtained from solution, based on methylmethacrylate (MMA) -PFEUMA copolymers. All coatings, even when the concentration of the fluorinated comonomer was very low (< 1% w/w), exhibited hydrophobic and lipophobic properties. Angle-dependent XPS analyses showed that the fluorinated monomer preferentially concentrates at the air surface of the films and a fluorine gradient normal to the surface is present. Surface properties could change by changing the substrate. In the thermoplastic films a surface reorganisation was observed by changing the interface. The wettability increased when the films were dipped in water; after complete drying, the surface regained its hydrophobicity.
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机译：通过使用具有以下结构的全氟醚产物（PFEUMA）获得新的氟化涂层：CF_3CF_2O（CF_2CF_2O）_M（CF_2O）_NCF_2CH_2OCONHCH_2CH_2CH_2CHCH_2CH_2CH_2CHCH_2CH_2CH_2CHCH_2CH_2CH_2CH_2其中M / N = 2和M_N = 1079所制备的氟化涂层是两个类型：1。通过加入典型的紫外线固化树脂（双酚A双乙醚二丙烯酸酯）的PFEUMA的光聚合而得到的固化膜。基于甲基丙烯酸甲酯（MMA）-PFEUMA共聚物，从溶液中获得的热塑性薄膜。所有涂层，即使氟化共聚单体的浓度非常低（<1％w / w），也表现出疏水性和脂肪性性质。角度依赖性XPS分析表明，氟化单体优先浓缩在薄膜的空气表面处，并且存在正常的氟梯度。表面特性可以通过改变基板来改变。在热塑性薄膜中，通过改变界面来观察表面重组。当薄膜浸入水中时，润湿性增加;完全干燥后，表面恢复其疏水性。
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