Table 1.
Contact angle measurements of glass, PLLA solvent-cast films and PLLA fibers spun directly on PLGA stripe, with and without plasma treatment
| Contact angle |
Significance | ||
|---|---|---|---|
| Untreated | Plasma treated | ||
| PLLA film | |||
| −PL | 59 ± 2.0 | 18 ± 5.1 | p < 0.001 |
| +PL | 58 ± 4.2 | 39 ± 6.9 | p < 0.001 |
| PLLA fibers | |||
| −PL | 63 ± 10.5 | 32 ± 5.5 | p < 0.001 |
| +PL | 68 ± 2.6 | 46 ± 4.9 | p < 0.001 |
| Glass | |||
| −PL | 27 ± 3.6 | ||
| +PL | 43 ± 9.4 | ||
Data shown are mean of 12 values ± SD. Plasma treating films and fibers significantly increases their wettability, making them as wettable as control glass. Coating with polylysine (PL) decreases wettability of plasma-treated samples but not the untreated samples. Despite the increase in contact angle, plasma-treated samples with polylysine remain hydrophilic relative to their untreated counterparts.