Abstract: ［Objective］UV-curable polyurethane acrylate coatings are widely used due to theirenvironmental friendliness and tunable performance. Nevertheless，their poor hydrophobicity caused byhydrophilic groups on the surface limits their further applications.［Methods］A series of fluorine-modified polyurethane acrylate（FPUA）resins were synthesized with isophorone diisocyanate（IPDI）as the diisocyanate， perfluoropolyether glycol（PFPE） to introduce perfluoroalkyl groups， and pentaerythritol triacrylate（PETA） to introduce unsaturated bonds. A series of FPUA coatings wereprepared by mixing the synthesized resins with reactive diluents and photoinitiators，followed by photocuring.［Results］The introduction of PFPE reduces the surface energy of the coatings，improves the hydrophobicity，and enhances the abrasion resistance and impact resistance simultaneously. When the molar ratio of IPDI to PFPE is 1∶0. 15，the coating exhibits excellent surface properties，with an initial water contact angle of 98. 5°，which can still remain at 94. 7° after 400 abrasion cycles. Furthermore，the coating achieves a hardness of 2H，an adhesion grade of 0，and can withstand an impact of 30 cm，showing favorable overall mechanical properties，and its visible light transmittance is close to 90%.［Conclusion］ The incorporation of PFPE improves the hydrophobic and abrasion-resistant properties of the coatings，which provides experimental benchmark for UV-curable polyurethane acrylates.

Key words: polyurethane acrylate, hydrophobicity, abrasion resistance, UV-curing, fluorinated modification, perfluoropolyether glycol

摘要： 【目的】光固化聚氨酯丙烯酸酯涂料因其环保且性能可调的特点得到广泛应用，但因其表面具有亲水基团使得疏水性较差从而限制了其应用。【方法】选用异佛尔酮二异氰酸酯（ IPDI），由全氟聚醚二醇（PFPE）引入全氟烷基，使用季戊四醇三丙烯酸酯（ PETA）引入不饱和键，合成了一系列氟改性聚氨酯丙烯酸酯（FPUA）树脂。将合成的树脂与活性稀释剂和光引发剂混合后固化，制备了一系列 FPUA涂层。【结果】 PFPE的引入降低了涂层的表面能，提高了涂层的疏水性，同时提高了涂层的耐磨性和耐冲击性。当 IPDI与 PFPE物质的量比为 1∶0. 15时，涂层展现出优异的表面性能，涂层的初始水接触角为 98. 5°，在经历 400次摩擦后水接触角仍能保持在 94. 7°。此外，涂层硬度达到 2H，划格试验 0级，而冲击性 30 cm，整体表现出良好的力学性能，在可见光下透过率接近 90%。【结论】 PFPE的引入提升了涂层的疏水性、耐磨性，为光固化聚氨酯丙烯酸酯涂层的疏水耐磨改性提供了实验参考。

关键词: 聚氨酯丙烯酸酯, 疏水性, 耐磨性, 光固化, 氟改性, 氟聚醚二醇

CLC Number: 

• TQ637. 83