Table 6.
Release characteristics of AcYPFF from different types of membranes
| Type of membrane | Release rate Higuchi’s model (mg cm−2 h−1) | Regression coefficient (R 2) | k (h−1)a | % released after 18 h | t 1/2 (h) |
|---|---|---|---|---|---|
| Cuprophan | 0.67 ± 0.01 | 0.998 | 0.27 | 53.15 ± 1.05 | 14.50 |
| Nitrocellulose | 0.75 ± 0.06 | 0.993 | 0.36 | 58.43 ± 6.82 | 10.50 |
| Nylon | 0.64 ± 0.53 | 0.991 | 0.35 | 50.23 ± 3.86 | 18.00 |
| PVDF | 0.90 ± 0.01 | 0.995 | 0.38 | 64.22 ± 5.44 | 9.50 |
| PTFE | ndb | nd | nd | nd | nd |
a Release constant calculated by the Guggenheim’s method for the initial 4 h
b Not determined