Laboratory of Surface and Interfacial Physics, University of Mons, 20 Place du Parc, 7000 Mons, Belgium.
Laboratory of Surface and Interfacial Physics, University of Mons, 20 Place du Parc, 7000 Mons, Belgium.
J Colloid Interface Sci. 2020 Feb 15;560:596-605. doi: 10.1016/j.jcis.2019.10.043. Epub 2019 Oct 19.
When they are used alone, some polymers, such as polypropylene, Carnauba wax or polycarbonate allow the creation of superhydrophobic surfaces by spin coating or casting. On the other hand, some other polymers, such as polystyrene, polyvinylacetate or polychloroprene, are unable to render a superhydrophobic surface by these techniques. Using binary mixtures of these two types of polymers in a single common solvent, superhydrophobic composite surfaces can be created. We aim to show that superhydrophobicity is depending on the ratio between the two polymers in the initial blend and their intrinsic wettability.
The transition towards superhydrophobicity is studied on composite surfaces made of various polymers. Surfaces are created with simple coating methods, such as casting or spin-coating, of polymer solutions and letting the solvent evaporate at ambient conditions.
Transitions are sharp and the amount of polypropylene in the blend to achieve superhydrophobicity decreases with the hydrophobicity of the second polymer. Topographic and wettability measurements are performed that show that both effects, topographical and chemical, interplay in the property of superhydrophobicity.
当单独使用时，某些聚合物，如聚丙烯、巴西棕榈蜡或聚碳酸酯，可以通过旋转涂层或浇铸来制造超疏水表面。另一方面，其他一些聚合物，如聚苯乙烯、聚醋酸乙烯酯或氯丁橡胶，无法通过这些技术产生超疏水表面。通过在单一共同溶剂中使用这两种类型的聚合物的二元混合物，可以制造出超疏水复合表面。我们的目的是表明超疏水性取决于初始共混物中两种聚合物之间的比例及其固有润湿性。
在由各种聚合物制成的复合表面上研究超疏水性的转变。通过简单的涂层方法，如聚合物溶液的浇铸或旋涂，并在环境条件下让溶剂蒸发，来制备表面。
转变是急剧的，达到超疏水性所需的混合物中聚丙烯的量随着第二聚合物的疏水性的增加而减少。进行了形貌和润湿性测量，表明超疏水性的这两个特性，形貌和化学性质，相互作用。
