Aghito Margherita, Hernandéz Rodríguez Gabriel, Antonini Carlo, Coclite Anna Maria
Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, Graz A-8010, Austria.
Department of Material Science, University of Milano-Bicocca, Via Roberto Cozzi 55, Milano 20125, Italy.
Langmuir. 2024 Jun 25;40(25):13017-13024. doi: 10.1021/acs.langmuir.4c00743. Epub 2024 Jun 13.
Controlling surface morphology is one of the main strategies used to tune surface hydrophobic and icephobic properties. Taking advantage of coating growth by initiated chemical vapor deposition, random and ordered wrinkles were induced on a thin film of polyperfluorodecyl acrylate (pPFDA) deposited on polydimethylsiloxane (PDMS) to simultaneously modify surface chemistry and morphology. A range of wrinkles of different wavelengths were studied, and how the wrinkle characteristics change with varying coating thickness. Ordered wrinkles enhanced hydrophobicity more when compared to random wrinkles, with a noticeable effect for coating thickness on the order of hundreds of nanometers. An insight into the mechanism of surface wrinkling and its effect on freezing delay is also provided, and promising results were found on ordered wrinkles, where a freezing delay was observed.
控制表面形态是调节表面疏水和憎冰性能的主要策略之一。利用引发化学气相沉积法进行涂层生长，在聚二甲基硅氧烷（PDMS）上沉积的聚全氟癸基丙烯酸酯（pPFDA）薄膜上诱导出随机和有序的皱纹，以同时改变表面化学性质和形态。研究了一系列不同波长的皱纹，以及皱纹特征如何随涂层厚度变化。与随机皱纹相比，有序皱纹更能增强疏水性，对于数百纳米量级的涂层厚度有显著影响。还深入探讨了表面起皱机理及其对结冰延迟的影响，并且在有序皱纹上发现了有前景的结果，观察到结冰延迟现象。
