Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 711 10 Heraklion, Crete, Greece.
Department of Chemistry, University of Crete, 710 03 Heraklion, Crete, Greece.
Nanoscale. 2023 Apr 13;15(15):6984-6998. doi: 10.1039/d2nr06780c.
The development of superhydrophobic and/or superoleophobic materials has been attracting the attention of the scientific community due to their wide range of applications. In this work, waterborne nanocomposite coatings were developed to be deposited onto flexible polyethylene films in order to modify them into superhydrophobic and even superoleophobic. The coatings consisted of either a low surface energy mixture of silanes/siloxanes or a fluoropolymer in conjunction with the appropriate inorganic nanoparticles that provide the necessary roughness; the effects of nanoparticle type and content on the behaviour was investigated. In both cases, the surface properties were investigated, and the polymer films were found to be superhydrophobic. Depending on the system utilized, the final material exhibited either low water adhesion, thus, being water repellent, or high water adhesion. The use of the fluoropolymer has led to coatings that exhibited superoleophobic behaviour for various organic compounds, as well. The application of the coatings did not influence either the optical transparency or the thermal properties of the polyethylene films. Moreover, the coated surfaces show similar or even better mechanical properties, scratch resistance and chemical durability in comparison to the neat LDPE film.
由于其广泛的应用，超疏水和/或超疏油材料的开发一直引起科学界的关注。在这项工作中，开发了水基纳米复合材料涂层，以便将其沉积到柔性聚乙烯薄膜上，从而将其改性为超疏水甚至超疏油。这些涂层由低表面能硅烷/硅氧烷混合物或氟聚合物与提供必要粗糙度的适当无机纳米粒子组成；研究了纳米粒子类型和含量对性能的影响。在这两种情况下，都对表面性能进行了研究，结果发现聚合物薄膜具有超疏水性。根据所使用的系统，最终材料表现出低的水附着力，因此具有疏水性，或高的水附着力。氟聚合物的使用导致涂层对各种有机化合物表现出超疏油性。该涂层的应用不会影响聚乙烯薄膜的光学透明度或热性能。此外，与纯 LDPE 薄膜相比，涂覆表面在机械性能、耐划伤性和化学耐久性方面表现出相似甚至更好的性能。
