Center for Biomolecular Nanotechnologies (CBN) of Italian Institute of Technology (IIT), Arnesano, Lecce, Italy.
J Colloid Interface Sci. 2011 Nov 15;363(2):668-75. doi: 10.1016/j.jcis.2011.07.075. Epub 2011 Aug 2.
Extremely lightweight plates made of an engineered PMMA-based composite material loaded with hollow glass micro-sized spheres, nano-sized silica particles and aluminum hydroxide prismatic micro-flakes were realized by cast molding. Their interesting bulk mechanical properties were combined to properly tailored surface topography compatible with the achievement of a superhydrophobic behavior after the deposition of a specifically designed hydrophobic coating. With this aim, we synthesized two different species of fluoromethacrylic polymers functionalized with methoxysilane anchoring groups to be covalently grafted onto the surface protruding inorganic fillers. By modulating the feed composition of the reacting monomers, it was possible to combine the hydrophobic character of the polymer with an high adhesion strength to the substrate and hence to maximize both the water contact angle (up to 157°) and the durability of the easy-to-clean effect (up to 2000 h long outdoor exposure).
通过铸造成型，实现了由经过工程设计的基于聚甲基丙烯酸甲酯的复合材料制成的极轻量板材，该材料中负载有空腔玻璃微球、纳米级二氧化硅颗粒和氢氧化铝棱柱形微薄片。将其有趣的体力学性能与兼容的表面形貌相结合，在沉积具有特定设计的疏水性涂层后，可实现超疏水性。为此，我们合成了两种不同的含甲氧基硅烷锚固基团的氟甲基丙烯酸酯聚合物，以便通过共价键接枝到表面突出的无机填料上。通过调节反应单体的进料组成，可以将聚合物的疏水性与对基材的高粘附强度结合起来，从而最大限度地提高水接触角（最高可达 157°）和易清洁效果的耐久性（最长可达 2000 小时的户外暴露）。
