Table 5 Wetting parameters for 20 µL sessile water drops on PP and PTFE
From: The measurement of the surface energy of solids using a laboratory drop tower
Parameter | PP | PTFE | |
|---|---|---|---|
γ S | mJ/m2 | 31.0481 | 20.9384 |
γ SL | mJ/m2 | 70.2298 | 64.9132 |
κ | — | 0.54818 | 0.64825 |
\(\Omega _S^{\kappa {\prime}}\) | mm2 | 11.3585 | 13.1434 |
\(\Omega _S^G\) | mm2 | 10.3006 | 12.7835 |
\(\Omega _L^{\kappa {\prime}}\) | mm2 | 28.2898 | 28.4698 |
\(\Omega _L^G\) | mm2 | 28.3079 | 28.4293 |
\(\Omega _{SL}^{\kappa {\prime}}\) | mm2 | 13.6414 | 11.8566 |
\(\Omega _{SL}^G\) | mm2 | 14.6993 | 12.2164 |
γ L \(\Omega _L^\kappa\) | µJ | 2.0595 | 2.0726 |
γ L \(\Omega _L^G\) | µJ | 2.0608 | 2.0690 |
γ S \(\Omega _S^\kappa\) | µJ | 0.3527 | 0.2752 |
γ S \(\Omega _S^G\) | µJ | 0.3198 | 0.2677 |
γ SL \(\Omega _{SL}^{\kappa {\prime}}\) | µJ | 0.9580 | 0.7696 |
γ SL \(\Omega _{SL}^G\) | µJ | 1.0323 | 0.7930 |
z c κ ′ | mm | 0.8146 | 0.8885 |
z cG | mm | 0.7596 | 0.8552 |
Aκ′ | µJ | 3.3702 | 3.1174 |
A G | µJ | 3.4130 | 3.1303 |
W M = A G −A κ′ | µJ | 0.0428 | 0.0129 |
θκ′ | ° | 92.04 | 99.62 |
θ G | ° | 90.86 | 100.99 |
