Table 1 Comparison of the plasma-based techniques for hydrophilicity improvement of PMMA polymer surface.
Plasma type | Plasma gas | Pressure | WCA of pristine sample | WCA after plasma treatment | References |
|---|---|---|---|---|---|
RF | O2 | 75 Pa | 83° | 45° | |
DC | O2 | 0.2 Torr | 72.5° | 51° | |
RF | O2 | 100 bar | 70.5° | 26.1° | |
RF | O2 | 0.2 Torr | 68.4° | 24.6° | |
DBD | O2 | Atm | 85° | 51° | |
RF | N2 | 0.5 Torr | 76.3° | 21.2° | |
RF | N2 | 0.5 Torr | 76.3° | 40.4° | |
DC | N2 | 3 × 10–3 Torr | 63.84° | 15.39° | |
DBD | N2 | Atm | 85° | 44° | |
RF | Air | 0.2 mbar | 77.64° | 61.31° | |
DBD | Air | Atm | 85° | 50° | |
Micro-barrier discharge | He + N2 | Atm | 80.1° | 66.4° | |
Micro-barrier discharge | He + CO2 | Atm | 80.1° | 56.9° | |
Micro-barrier discharge | He + O2 | Atm | 80.1° | 70.5° | |
RF | He + O2 | Atm | 74° | 40° | |
AC | He | Atm | 69° | 27° | |
AC | Ar + H2O | Atm | 74° | 43° | |
RF | Ar + H2O | Atm | 80° | 35° | |
RF | Ar | Atm | 80° | 20° | |
AC | Ar | Atm | 69° | 32° | |
Microwave | Ar | Atm | 83° | 29.7° | Present study |
