Work

Fluorine-free superhydrophobic surfaces by atmospheric pressure plasma deposition of silazane-based suspensions

Year: 2024

Type: article

Abstract: Atmospheric plasma is used to deposit superhydrophobic fluorine-free thin films onto a substrate. In this process, a suspension of micron size silica particles in a silazane based precursor is deposited in a single step using a dielectric barrier discharge plasma jet moving above the substrate. Thanks to an optimized configuration between the suspension injection and the plasma jet , the silazane precursor can be polymerized on the substrate surface but also, on silica particles to form additional micro size particles. The experimental parameters for optimal deposition are discussed, with emphasis on those leading to the formation of this dual roughness surface caused by the arrangement of both silica particles and particles generated from the precursor plasma polymerization . The combination of these two different length scales for the roughness leads to a decreased wettability of the coated substrate and a water contact angle larger than 150°.

Source: Applied Surface Science Advances

DOI: 10.1016/j.apsadv.2024.100645

Authors: Camilo Rendon Piedrahita, Kamal Baba, Robert Quintana, Patrick Choquet

Institution: Luxembourg Institute of Science and Technology

Language: English

Topic: Surface Modification and Superhydrophobicity

Subfield: Surfaces, Coatings and Films

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,970

Funder: Fonds National de la Recherche Luxembourg