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

IF 7.5 Q1 CHEMISTRY, PHYSICAL Applied Surface Science Advances Pub Date : 2024-09-27 DOI:10.1016/j.apsadv.2024.100645
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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°.
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通过常压等离子体沉积硅烷基悬浮液实现无氟超疏水性表面
大气等离子体用于在基底上沉积超疏水无氟薄膜。在这一工艺中,使用在基底上方移动的介质阻挡放电等离子体射流,将微米大小的二氧化硅颗粒悬浮在硅氮烷前体中,一步完成沉积。由于优化了悬浮液喷射和等离子体喷射之间的配置,硅烷前驱体不仅能在基底表面聚合,还能在二氧化硅颗粒上形成额外的微小颗粒。本文讨论了优化沉积的实验参数,重点是硅颗粒和前驱体等离子聚合产生的颗粒的排列所导致的双重粗糙表面的形成。这两种不同长度尺度的粗糙度结合在一起,导致涂层基底的润湿性降低,水接触角大于 150°。
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来源期刊
CiteScore
8.10
自引率
1.60%
发文量
128
审稿时长
66 days
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