I am trying to coat wood using SF6/Argon cold-plasma with low-pressure (0.3 torr). My aim is to increase wood hydrophobicity. However, I always obtaining a hydrophilic surface. I used higher SF6 flow rates (50 sccm) and lower argon flow rates (5 sccm); different discharge times (5-10 min) and power levels (50-100W) but surface samples became fully wetted. 

Anyone have expertise in this topic?

Kind regards,

Pedro

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