Tawfilas Massimo, Bartolini Torres Gianluca, Lorenzi Roberto, Saibene Melissa, Mauri Michele, Simonutti Roberto
Department of Materials Science, University of Milano-Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy.
Piattaforma di Microscopia, University of Milano-Bicocca, 20126 Milano, Italy.
ACS Omega. 2024 Jun 24;9(27):29339-29349. doi: 10.1021/acsomega.4c01053. eCollection 2024 Jul 9.
Transparent nanocomposite films made of surface-modified titanium dioxide nanoparticles and thermoplastic polyurethane are prepared via film casting approach showing enhanced refractive indexes and mechanical properties. Two different sets of composites were prepared up to 37.5 wt % of inorganic nanoparticles with a diameter <15 nm, one set using particles capped only with oleic acid and a second one with a bimodal system layer made of oleic acid and mPEO-5000 as coating agents. All of the composites show significantly enhanced refractive index and mechanical properties than the neat polymeric matrix. The transparency of nanocomposite films shows the excellent dispersion of the inorganic nanoparticles in the polymeric matrix avoiding aggregation and precipitation phenomena. Our study provides a facile and feasible route to produce transparent nanocomposite films with tunable mechanical properties and high refractive indices for various applications.
通过流延成膜法制备了由表面改性的二氧化钛纳米颗粒和热塑性聚氨酯制成的透明纳米复合薄膜，其具有增强的折射率和机械性能。制备了两组不同的复合材料，其中无机纳米颗粒的含量高达37.5 wt%，直径<15 nm，一组使用仅用油酸包覆的颗粒，另一组使用由油酸和mPEO-5000作为包覆剂制成的双峰体系层。所有复合材料的折射率和机械性能均比纯聚合物基体有显著提高。纳米复合薄膜的透明度表明无机纳米颗粒在聚合物基体中具有优异的分散性，避免了团聚和沉淀现象。我们的研究提供了一种简便可行的方法来制备具有可调机械性能和高折射率的透明纳米复合薄膜，以用于各种应用。
