Sekiguchi Kazutoshi, Nakanishi Takayuki, Segawa Hiroyo, 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 Omega. 2019 Aug 22;4(10):14333-14339. doi: 10.1021/acsomega.9b02114. eCollection 2019 Sep 3.
Non-close-packed (NCP) silica nanoparticle monolayer arrays (SNMA) on ordered porous anodic aluminum oxide (AAO) templates were fabricated for the first time by a novel two-step spin-coating technique. The obtained NCP-SNMA-AAO was composed of silica nanoparticles (average primary particle size of 440 nm) and well-organized nanopores on the AAO substrates. NCP-SNMA-AAO with a supporting ratio of 87% silica nanoparticles showed a hydrophilic surface (water contact angle of 51.0°), while the original AAO substrate shows a hydrophobic surface (water contact angle of 107.9°). The maximum coefficient of static friction was decreased by 29% (0.327 → 0.233). The coefficient of dynamic friction was also decreased by 20% (0.281 → 0.226). We found that controlling the silica supporting ratio using the two-step spin-coating technique is an effective approach for surface modification of an AAO substrate.
首次通过一种新颖的两步旋涂技术在有序多孔阳极氧化铝（AAO）模板上制备了非密排（NCP）二氧化硅纳米颗粒单层阵列（SNMA）。所获得的NCP-SNMA-AAO由二氧化硅纳米颗粒（平均一次粒径为440nm）和AAO基底上排列良好的纳米孔组成。二氧化硅纳米颗粒负载率为87%的NCP-SNMA-AAO呈现亲水性表面（水接触角为51.0°），而原始的AAO基底呈现疏水性表面（水接触角为107.9°）。最大静摩擦系数降低了29%（从0.327降至0.233）。动摩擦系数也降低了20%（从0.281降至0.226）。我们发现，使用两步旋涂技术控制二氧化硅负载率是对AAO基底进行表面改性的有效方法。
