ABSTRACT

A silica/epoxy hydrophobic coating (water contact angel (WCA) = 130°) was prepared on a glass substrate and further treated in a low-temperature plasma (PL) condition, which surprisingly resulted in an amphiphilic surface (best WCA = 3.5°, best oil CA = 5°) with excellent surface stability and without decay along with the time. We systematically studied the influences of two working gases (O₂, Ar) and the working time of PL-treatment on the wetting behaviour (for both water and oil) and the aging effects of the PL-treated silica/epoxy coating, using SEM, FTIR-ATR, XPS and metallographic microscope. The results suggested that the stable super-amphiphilic change, causing by O₂ or Ar low-temperature PL-treatment, can be attributed to a physical smoother surface (bombed by PL-treatment) and the surface chemical state change (more polar groups, OH/NH₂).

摘要

在玻璃基材上制备二氧化硅/环氧疏水涂层（水接触角（WCA）= 130°）并在低温等离子体（PL）条件下进一步处理，这令人惊讶地产生了两亲性表面（最佳WCA = 3.5° , 最佳油 CA = 5°) 具有优异的表面稳定性且不会随时间衰减。我们系统地研究了两种工作气体（O ₂，Ar）和 PL 处理的工作时间对润湿行为（水和油）的影响以及 PL 处理的二氧化硅/环氧树脂涂层的老化效应，使用 SEM 、FTIR-ATR、XPS 和金相显微镜。结果表明，稳定的超两亲变化，由 O ₂或 Ar 低温 PL 处理，可归因于物理更光滑的表面（被 PL 处理轰炸）和表面化学状态变化（更多极性基团，OH/NH ₂）。