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Summary of the effects of different parameters on response variable (release rate and DC).
| Formulations | (ECH) (%, w/w) | Parameters and their levels | Response variable | ||
|---|---|---|---|---|---|
| Cross-linking time (h) | Reaction temperature (°C) | DC (%) | Release rate (h1/2) | ||
| F-1 | 3 | 1 | 54 | 37.3 ± 3.5 | 31.6 |
| F-2 | 3 | 10 | 54 | 41.5 ± 1.8 | 28.4 |
| F-3 | 3 | 10 | 25 | 39.7 ± 2.1 | 28.9 |
| F-4 | 16 | 10 | 25 | 93.8 ± 4.0 | 26.8 |
| F-5 | 16 | 1 | 54 | 62.6 ± 3.1 | 29.5 |
| F-6 | 16 | 1 | 25 | 61.8 ± 3.8 | 30.3 |
| F-7 | 16 | 10 | 54 | 94.2 ± 2.4 | 27.9 |
| F-8 | 3 | 1 | 25 | 36.7 ± 1.1 | 32.4 |
