Due to its nontoxicity and eco-friendliness, waterborne polyurethane (WPU) has attracted increasing attention for use in various industrial applications. To ensure dispersal or dissolution in water, the molecular structures of most WPUs contains ionic groups. Dried WPU films, however, are generally hydrophilic and have a limited application range. To confer high hydrophobicity and antifouling properties to WPU, the incorporation of a fluorocarbon chain into WPU is an efficient approach. Herein, we present a facile and effective approach for synthesizing a novel WPU with a fluorinated side group, a key aspect of which is the preparation of dihydroxy-terminated 1,1,2,2-tetrahydroperfluorodecyl methacrylate (FDMA(OH)₂) by a thiol-ene “click” reaction. A chain extender rich in fluorinated side groups is then adapted specifically to an OCN-terminated WPU prepolymer to obtain fluorinated waterborne polyurethane (FWPU). Our results show that fluorine units are present on the surface of FWPU films. The introduction of FDMA side groups slightly decreases the storage and thermal stability of FWPU but does not affect its usability and significantly increases its hydrophobicity. The result of a repelling test demonstrates that the introduction of FDMA side groups endows the WPU films with excellent waterproofing and antifouling properties. This new method provides a facile and effective way to fabricate of FWPU for its practical application in waterproof and antifouling coatings.

由于其无毒和环保，水性聚氨酯 (WPU) 在各种工业应用中的使用越来越受到关注。为了确保在水中的分散或溶解，大多数 WPU 的分子结构都包含离子基团。然而，干燥的 WPU 薄膜通常是亲水的，应用范围有限。为了赋予 WPU 高疏水性和防污性能，将碳氟化合物链并入 WPU 是一种有效的方法。在此，我们提出了一种合成具有氟化侧基的新型 WPU 的简便有效方法，其中一个关键方面是制备二羟基封端的 1,1,2,2-四氢全氟癸基甲基丙烯酸酯 (FDMA(OH) ₂) 通过硫醇-烯“点击”反应。然后将富含氟化侧基的扩链剂专门用于 OCN 封端的 WPU 预聚物，以获得氟化水性聚氨酯 (FWPU)。我们的结果表明氟单元存在于 FWPU 薄膜的表面。FDMA 侧基的引入略微降低了 FWPU 的储存和热稳定性，但不影响其可用性并显着增加其疏水性。排斥试验的结果表明，FDMA 侧基的引入使 WPU 薄膜具有优异的防水和防污性能。这种新方法为 FWPU 在防水和防污涂料中的实际应用提供了一种简便有效的方法。