## 3 Results and Discussion
### Aging of Samples Due to Storage
\begin{table}
\begin{tabular}{c c c c c c c} \hline  & **After** & **After** & **After** & **After** & **After** & **After** \\  & **Treatment** & **1 Day** & **7 Days** & **14 Days** & **30 Days** & **60 Days** \\ \hline \multicolumn{6}{c}{water contact angle [\({}^{\circ}\)]} \\ \hline NTSS with oxygen plasma & 38.3 \(\pm\) 0.4 & 38.8 \(\pm\) 2.4 & 41.8 \(\pm\) 0.7 & 56.0 \(\pm\) 1.1 & 51.3 \(\pm\) 2.0 & 48.7 \(\pm\) 0.6 \\ BCP with oxygen plasma & 39.6 \(\pm\) 0.8 & 42.6 \(\pm\) 0.6 & 43.4 \(\pm\) 0.8 & 64.8 \(\pm\) 1.7 & 54.4 \(\pm\) 2.4 & 58.0 \(\pm\) 2.2 \\ TCL with oxygen plasma & 37.3 \(\pm\) 1.7 & 42.3 \(\pm\) 0.4 & 43.1 \(\pm\) 1.5 & 63.3 \(\pm\) 1.2 & 53.2 \(\pm\) 3.1 & 56.7 \(\pm\) 2.5 \\ NTSS with argon plasma & 37.6 \(\pm\) 3.0 & 42.5 \(\pm\) 2.5 & 45.3 \(\pm\) 1.7 & 42.7 \(\pm\) 0.9 & 46.5 \(\pm\) 0.8 & 48.2 \(\pm\) 0.9 \\ BCP with argon plasma & 43.4 \(\pm\) 1.4 & 47.7 \(\pm\) 2.3 & 48.2 \(\pm\) 0.9 & 48.5 \(\pm\) 2.3 & 51.5 \(\pm\) 1.7 & 53.4 \(\pm\) 1.9 \\ TCL with argon plasma & 44.2 \(\pm\) 1.5 & 46.1 \(\pm\) 1.1 & 48.2 \(\pm\) 0.7 & 49.1 \(\pm\) 1.0 & 48.8 \(\pm\) 0.5 & 55.5 \(\pm\) 2.9 \\ \hline \multicolumn{6}{c}{diiodomethane contact angle [\({}^{\circ}\)]} \\ \hline NTSS with oxygen plasma & 39.8 \(\pm\) 0.9 & 40.7 \(\pm\) 1.6 & 40.3 \(\pm\) 0.1 & 42.7 \(\pm\) 2.4 & 37.9 \(\pm\) 1.9 & 44.4 \(\pm\) 1.3 \\ BCP with oxygen plasma & 39.9 \(\pm\) 1.3 & 40.2 \(\pm\) 0.9 & 41.6 \(\pm\) 0.9 & 42.6 \(\pm\) 0.6 & 40.7 \(\pm\) 0.6 & 42.2 \(\pm\) 0.6 \\ TCL with oxygen plasma & 34.4 \(\pm\) 4.5 & 39.9 \(\pm\) 1.3 & 42.6 \(\pm\) 0.5 & 40.6 \(\pm\) 0.9 & 41.8 \(\pm\) 0.4 & 43.8 \(\pm\) 1.1 \\ NTSS with argon plasma & 37.6 \(\pm\) 3.7 & 37.2 \(\pm\) 4.9 & 41.4 \(\pm\) 1.2 & 40.7 \(\pm\) 0.9 & 41.6 \(\pm\) 0.6 & 43.0 \(\pm\) 0.5 \\ BCP with argon plasma & 39.0 \(\pm\) 0.9 & 40.5 \(\pm\) 2.6 & 39.3 \(\pm\) 0.7 & 39.6 \(\pm\) 1.3 & 41.8 \(\pm\) 0.5 & 42.2 \(\pm\) 0.5 \\ TCL with argon plasma & 34.8 \(\pm\) 4.3 & 37.9 \(\pm\) 2.2 & 41.5 \(\pm\) 0.5 & 39.6 \(\pm\) 0.7 & 41.3 \(\pm\) 0.6 & 44.9 \(\pm\) 0.2 \\ \hline \multicolumn{6}{c}{ethylene glycol contact angle [\({}^{\circ}\)]} \\ \hline NTSS with oxygen plasma & 14.7 \(\pm\) 1.0 & 15.5 \(\pm\) 0.5 & 16.0 \(\pm\) 1.0 & 34.5 \(\pm\) 0.4 & 23.8 \(\pm\) 2.8 & 25.2 \(\pm\) 1.3 \\ BCP with oxygen plasma & 9.6 \(\pm\) 2.3 & 11.1 \(\pm\) 1.3 & 14.2 \(\pm\) 1.1 & 32.2 \(\pm\) 1.5 & 23.5 \(\pm\) 1.6 & 29.4 \(\pm\) 1.5 \\ TCL with oxygen plasma & 11.9 \(\pm\) 2.1 & 13.7 \(\pm\) 1.3 & 17.7 \(\pm\) 1.4 & 33.9 \(\pm\) 1.6 & 23.6 \(\pm\) 2.6 & 33.8 \(\pm\) 1.6 \\ NTSS with argon plasma & 13.4 \(\pm\) 2.7 & 10.5 \(\pm\) 2.0 & 12.5 \(\pm\) 1.5 & 18.1 \(\pm\) 1.8 & 22.7 \(\pm\) 2.3 & 20.8 \(\pm\) 1.8 \\ BCP with argon plasma & 16.6 \(\pm\) 3.0 & 16.3 \(\pm\) 3.2 & 19.4 \(\pm\) 1.0 & 21.3 \(\pm\) 2.2 & 24.5 \(\pm\) 2.4 & 26.2 \(\pm\) 1.0 \\ TCL with argon plasma & 11.3 \(\pm\) 2.9 & 13.9 \(\pm\) 2.1 & 22.3 \(\pm\) 1.3 & 23.0 \(\pm\) 1.5 & 27.2 \(\pm\) 0.8 & 31.5 The course of changes in the contact angle with ethylene glycol is similar to that observed for water, but with significantly lower values (Table 2). It is worth noting that the changes significantly depend on the type of gas used for plasma activation, regardless of the type of liquid used for contact angle measurements. In the case of oxygen plasma-activated samples, a sharp decrease in wettability was observed on day 14 and its subsequent improvement on day 30 of storage, as assessed by both ethylene glycol and water contact angles. In contrast, the changes occurring for samples modified with argon plasma have a completely different course, i.e., close to a linear increase in values. In conclusion, it can be said that the type of gas and the type of film have a significant effect on the obtained ethylene glycol CA values, although in this case it is not possible to indicate the film for which the values would be clearly lower, as in the case of water. Analysis of the course of aging of plasma activation effects based on the SFE value confirms the conclusions drawn from the contact angle analysis.