Surface modification of PTFE using an atmospheric pressure plasma jet in argon and argon + CO2

► Plasma surface modification of PTFE with an atmospheric pressure plasma jet in argon and argon/CO2 ► Short plasma treatment times enable a small decrease in contact angle caused by incorporation of oxygen ► At extended treatment times, the contact angle increases again due to advanced chain scission ► Wettability of PTFE cannot be greatly enhanced because of surface degradation processes