A new photocurable coating process that combines ultra violet light emitting diode (UV-LED) and deliberately synthesized photocurable polyurethane acrylate (PUA) was developed in this study. The structures of the PUA were characterized by attenuated total reflectance flourier transformed infrared (ATR-FTIR), porton nuclear magnetic resonance (¹H NMR) and gel permeation chromatography (GPC). The structure-activity relationship of such PUA was studied by rheological measurements, photopolymerization performance, and mechanical tests. By adjusting the molecular weight and the number of functional groups in the PUA, balanced the wear resistance and flexibility of the photocured coatings were achieved. The optimal formula for photocurable coating was obtained as follows: the R-value (the molar ratio of –NCO/–OH) of PUA was 1.3, the ratio of PUA/HEA (2-hydroxyethyl acrylate) was 60 wt%/40 wt%, and the ratio of end-capped agent HEA/PETA (pentaerythritol triacrylate) was 2/1. With the optimized photocurable coating formula, textile artificial leathers were fabricated and exhibited excellent colorfastness to rubbing, and Martindale abrasion resistance and satisfied fabric handle.

本研究开发了一种结合了紫外发光二极管（UV-LED）和特意合成的光固化聚氨酯丙烯酸酯（PUA）的新型光固化涂层工艺。PUA的结构通过衰减全反射傅里叶变换红外（ATR-FTIR）、波顿核磁共振（¹H NMR) 和凝胶渗透色谱法 (GPC)。通过流变测量、光聚合性能和机械测试研究了这种 PUA 的构效关系。通过调节PUA中的分子量和官能团数量，实现了光固化涂层的耐磨性和柔韧性的平衡。得到光固化涂层的最佳配方如下：PUA的R值（-NCO/-OH的摩尔比）为1.3，PUA/HEA（丙烯酸2-羟乙酯）的比例为60 wt%/40 wt ％，封端剂HEA/PETA(季戊四醇三丙烯酸酯)的比例为2/1。通过优化的光固化涂料配方，制备出的纺织人造革具有优异的耐摩擦色牢度、马丁代尔耐磨性和令人满意的织物手感。