This investigation reports the preparation and properties of thermoplastic polyurethane/silica nanocomposite prepared via melt mixing process. In this case, nanosilica at different loading was mixed with a polyester-based thermoplastic polyurethane (TPU). The dispersion of nanofiller was studied by the SEM and TEM analyses. The nanocomposite with optimal dispersion of nanofiller has better filler-polymer interaction that has been confirmed by the FT-IR study. TPU with 1 phr of nanosilica loading showed better tensile properties. DSC study revealed that incorporation of fumed silica in the TPU matrix does not substantially affect the refinement of TPU crystallite, and thus resulted in an insignificant change in glass transition temperature (Tg) and crystalline melting temperature of the nanocomposite. TGA study also confirmed enhanced onset degradation temperature and maximum degradation temperature (T_max) for optimal nanosilica composite. The final degradation temperature and char content also increased with an increase in fumed silica content. Water contact angle (WCA) study revealed that hydrophilicity of the nanocomposite increased with the incorporation of fumed silica.

该研究报道了通过熔融混合工艺制备的热塑性聚氨酯/二氧化硅纳米复合材料的制备和性能。在这种情况下，将不同负载量的纳米二氧化硅与聚酯基热塑性聚氨酯（TPU）混合。通过SEM和TEM分析研究了纳米填料的分散性。FT-IR研究证实，具有最佳纳米填料分散性的纳米复合材料具有更好的填料-聚合物相互作用。载有1 phr纳米二氧化硅的TPU表现出更好的拉伸性能。DSC研究表明，在TPU基体中掺入气相二氧化硅基本不会影响TPU晶体的细化，因此不会导致纳米复合材料的玻璃化转变温度（Tg）和晶体熔化温度发生明显变化。_max）以获得最佳的纳米二氧化硅复合材料。最终降解温度和炭含量也随气相法二氧化硅含量的增加而增加。水接触角（WCA）研究表明，纳米复合物的亲水性随着气相二氧化硅的掺入而增加。