Table 1.
Compositions of acrylic acid–based hydrogels.
| Sample | Acrylic Acid, mL | 40% KOH Solution, mL | 5% “Cold” Starch v/v, mL | 5% “hot” starch v/v, mL | Matricaria chamomilla L. Extract, mL | Crosslinker *, mL | Photoinitiator A **, mL | Photoinitiator B ***, mL |
|---|---|---|---|---|---|---|---|---|
| 1A | 15 | 17 | 5 | - | - | 5 | 0.25 | - |
| 2A | - | 5 | - | |||||
| 3A | 5 | - | 5 | |||||
| 4A | - | 5 | 5 | |||||
| 1B | 5 | - | - | - | 0.25 | |||
| 2B | - | 5 | - | |||||
| 3B | 5 | - | 5 | |||||
| 4B | - | 5 | 5 |
* Diacrylate poly(ethylene glycol) Mn = 575 g/mol. ** 2-hydroxy-2-methylpropiophenone, Darocur 1173. *** Phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide.