Sekiguchi Kazutoshi, Katsumata Ken-Ichi, Segawa Hiroyo, Nakanishi Takayuki, Yasumori Atsuo
Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
Materials Research Laboratories, Nissan Chemical Corporation, 488-6 Suzumi-cho, Funabashi, Chiba 274-0052, Japan.
ACS Appl Mater Interfaces. 2020 Jun 17;12(24):27672-27681. doi: 10.1021/acsami.0c03436. Epub 2020 Jun 5.
The fabrication and properties of silica nanoparticle monolayer arrays (SNMAs) immobilized on silica films on nanoporous anodic aluminum oxide (AAO) substrates by polymerization of silicic acid and a two-step spin-coating technique are reported. Reflection spectra of the obtained silica-SNMA nanocomposite films on AAO substrates were almost the same as those of the original AAO substrate. The coefficient of friction at an applied load of 0.98 N under dry conditions for a film fabricated under optimal conditions was significantly decreased by 76% with respect to that without a silica-SNMA nanocomposite film on an AAO substrate. The results also showed a lower coefficient of friction than that for MoS nanoparticles (commonly used for self-lubricating films) deposited on an AAO substrate. We demonstrate that the silica-SNMA nanocomposite film with an optimal nanoroughness, thickness, and wear resistance can be used as a novel coating film for AAO substrates with both a high color degree of freedom and a low coefficient of friction at a high applied load (ca. 1 N).
报道了通过硅酸聚合和两步旋涂技术将二氧化硅纳米颗粒单层阵列（SNMAs）固定在纳米多孔阳极氧化铝（AAO）基底上的二氧化硅薄膜上的制备方法及其性能。在AAO基底上获得的二氧化硅-SNMA纳米复合薄膜的反射光谱与原始AAO基底的反射光谱几乎相同。在最佳条件下制备的薄膜在0.98 N的外加负载下，干燥条件下的摩擦系数相对于在AAO基底上没有二氧化硅-SNMA纳米复合薄膜的情况显著降低了76%。结果还表明，其摩擦系数低于沉积在AAO基底上的MoS纳米颗粒（常用于自润滑薄膜）的摩擦系数。我们证明，具有最佳纳米粗糙度、厚度和耐磨性的二氧化硅-SNMA纳米复合薄膜可作为一种新型的AAO基底涂膜，在高外加负载（约1 N）下具有高自由度颜色和低摩擦系数。
