To endow antiglare waterborne polyurethane with toughness, thermal stability, and water resistance is highly desired. Herein, we first prepared amphiphilic polyurethane modified silica (MSiO₂) nano-particles by in-situ polymerization and then physically incorporated it with waterborne polyurethane (WPU) dispersion to fabricate WPU composite (WPU-MSiO₂). The FT-IR, TG-DTG, and SEM analyses demonstrated that the urethane chains were covalently attached onto the silica surface, and the MSiO₂ exhibited good dispersibility and compatibility with WPU matrix. Moreover, embedded MSiO₂ particles could not only impart the WPU-MSiO₂ composites with good antiglare function, but also improve the mechanical, thermal, and water resistance of composites. Notably, the most effective enhancements in antiglare and other physicochemical performances were achieved when incorporating 3 wt% of MSiO₂ into the WPU dispersion to fabricate the WPU-MSiO₂3 composite. In particular, the WPU-MSiO₂3 composite film possessed the transmittance of 94.6% and 60° gloss of 27.0, respectively, which satisfying the requirement of an antiglare coating. Furthermore, WPU-MSiO₂3 composite exhibited great increase in tensile strength, elongation at break, maximum decomposition temperature, and water contact angle (20.8 MPa, 636.5%, 389.5 °C, and 99.1°, respectively) as well when compared to the neat WPU and WPU-SiO₂3 films. The present research provided a cost-effective way for preparing high-performance antiglare polymer coatings.

为了赋予防眩水性聚氨酯以韧性，热稳定性和耐水性。在这里，我们首先通过原位聚合制备了两亲性聚氨酯改性的二氧化硅（MSiO ₂）纳米粒子，然后将其与水性聚氨酯（WPU）分散体进行物理掺混，以制备WPU复合材料（WPU-MSiO ₂）。FT-IR，TG-DTG和SEM分析表明，氨基甲酸酯链共价连接到二氧化硅表面，MSiO ₂表现出良好的分散性和与WPU基质的相容性。此外，包埋的MSiO ₂颗粒不仅可以赋予WPU-MSiO ₂具有良好的防眩功能的复合材料，还可以提高复合材料的机械，耐热和耐水性。显着地，当将3重量％的MSiO ₂掺入WPU分散体中以制造WPU-MSiO ₂ 3复合材料时，在防眩光和其他物理化学性能方面实现了最有效的增强。特别地，WPU-MSiO ₂ 3复合膜的透射率分别为94.6％和60°光泽度为27.0，满足了防眩涂层的要求。此外，WPU-MSiO ₂与纯WPU和WPU-SiO相比，3种复合材料的抗张强度，断裂伸长率，最大分解温度和水接触角（分别为20.8 MPa，636.5％，389.5°C和99.1°）也表现出极大的提高₂ 3电影。本研究为制备高性能防眩聚合物涂料提供了一种经济有效的方法。