Artículo
Long-lasting low fluorinated stainless steel hierarchical surfaces for omniphobic, anti-fouling and anti-icing applications
Autor/es | Montes, Laura
Rico, Víctor Núñez-Gálvez, Fernando Arenas, María Ángeles Conde del Campo, Ana López Flores, Víctor Espinós, Juan P. Borrás, Ana González-Elipe, Agustín R. López Santos, Carmen |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada I |
Fecha de publicación | 2024-03 |
Fecha de depósito | 2024-06-18 |
Resumen | Stainless steel (SS) alloys are prevalent in many industries, household appliances or other commodities, where a strict control of surface properties is required to tailor their interaction with the environment. In this ... Stainless steel (SS) alloys are prevalent in many industries, household appliances or other commodities, where a strict control of surface properties is required to tailor their interaction with the environment. In this work we report a new procedure of stainless steel surface processing that provides a multifunctional response including superhydrophobicity, omniphobicity, self-cleaning, anti-fouling and effective anti-icing capacity, while still preserving a corrosion resistance similar to that of this material in compact form. The method consists of a first nanostructuration step followed by a low fluorination. The nanostructured surfaces presented a dual scale roughness of hierarchical character. The liquid free approach developed in this work to get this singular surface nanostructuration entails a first laser treatment of stainless steel flat substrates, followed by the deposition of a nanostructured thin layer of this material by electron beam evaporation in an oblique angle configuration. The resulting hierarchical surfaces were subjected to fluorination by: (i) the plasma-assisted deposition of a thin Teflon-like coating or (ii) the grafting of fluorinated molecules. The self-cleanable, anti-adherent and ice repellent character of the resulting low fluorinated surfaces outperformed the behaviour of classical slippery surfaces obtained by the infusion of high amounts of fluorinated liquids. These hierarchical SS surfaces withstood mild abrasion tests and the effect of water jets. Moreover, the corrosion behaviour of the fluorinated surfaces determined through their potentiodynamic analysis revealed a similar corrosion resistance than the flat SS substrates. Outstandingly, after these corrosion tests, the fluorinated samples obtained by grafting preserved their surface functionalities without significant degradation. The high mechanical and chemical stability of these low fluorinated samples support their usage for a large variety of applications. |
Agencias financiadoras | European Union (UE). H2020 Ministerio de Ciencia e Innovación (MICIN). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Universidad de Sevilla |
Identificador del proyecto | EU H2020 899352
TED2021-130916B-I00 PID2022-143120OB-I00 VII Plan Propio de Investigación y Transferencia |
Ficheros | Tamaño | Formato | Ver | Descripción |
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SI_lopez-santos_2024_long.pdf | 12.13Mb | [PDF] | Ver/ | |