A series of waterborne polyurethane-silica (WPUS) crosslinked hybrid dispersions were prepared based on polyoxytetramethylene glycol (PTMG) and isophorone diisocyanate (IPDI) as the raw materials, with 2-hydroxyethyl methacrylate (HEMA) and pentaerythritol triacrylate (PETA) as grafting reagents and (3-mercaptopropyl)triethoxysilane (MPTES) as the coupling agent. SiO₂ nanoparticles that functioned as a nanofiller were introduced by a novel click chemistry method. Crosslinked networks were constructed in the WPUS, with SiO₂ acting as the crosslinks. The effects of the amount of SiO₂ on the properties of the WPUS nanocomposites were investigated. It was found that WPUS films exhibited admirable thermal properties due to their crosslinked structure. Contact angle tests and water absorption rate measurement results demonstrated the hydrophobicity of WPUS films are obviously enhanced, because of the migration and crosslinked of highly hydrophobic silicon which has lower surface energy during the film formation. Meanwhile, SiO₂ as a crosslinker and reinforcing filler, which affects the mechanical tensile in this system, the tensile strength of the WPUS increased from 10.45 MPa to 24.10 MPa with increased amounts of SiO₂. The performances of the WPUS composite material top the most, when the amount of SiO₂ is 2.5 wt%.

以聚氧四亚甲基二醇（PTMG）和异佛尔酮二异氰酸酯（IPDI）为原料，以甲基丙烯酸2-羟乙酯（HEMA）和季戊四醇三丙烯酸酯（PETA）为接枝剂，制备了一系列水性聚氨酯-二氧化硅（WPUS）交联分散体。 （3-巯基丙基）三乙氧基硅烷（MPTES）作为偶联剂。通过新颖的点击化学方法，引入了充当纳米填料的SiO ₂纳米颗粒。在WPUS中构建了交联网络，其中SiO ₂充当交联键。SiO ₂量的影响研究了WPUS纳米复合材料的性能。发现WPUS膜由于其交联结构而表现出令人钦佩的热性能。接触角测试和吸水率测量结果表明，由于高疏水性硅的迁移和交联在膜形成过程中具有较低的表面能，因此WPUS膜的疏水性得到了明显增强。同时，作为交联剂和增强填料的SiO ₂会影响该系统的机械拉伸强度，随着SiO ₂含量的增加，WPUS的拉伸强度从10.45 MPa增加到24.10 MPa 。当SiO ₂含量为2.5 wt％时，WPUS复合材料的性能最高。