Abstract
AbstractSuper‐hydrophobic surface‐modification of silicone rubber (SIR) as an outdoor insulator by CF4 radio frequency (RF) inductively coupled plasma (ICP) and capacitively coupled plasma (CCP) has been studied. X‐Ray photoelectron spectroscopy, atomic force microscopy, and static contact angle measurements were employed to characterize the changes of the surface chemical composition, topography, and hydrophobicity. The results show that etching or ablation and fluorination are parallel and competitive during both treatments. The improvement of hydrophobicity is ascribed to the coaction of the increase of surface roughness and the introduction of fluoric groups (CCFn) or structures (SiF and SiF2). It is also found that the ratio of [SiF]/[CF] and the increase of surface roughness of the SIR treated by CCP are higher than that by ICP, which leads to a greater hydrophobic modification effect by the CCP process.magnified image
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