Table I.
Characteristics of Chitosan/Gp Hydrogels
| Sample | Starting Solution | Final hydrogel | ||||
|---|---|---|---|---|---|---|
| Chitosana (% w/v) | Gp (mol/L) | pHb | Gelation Timeb (min) | Reversibility (sol–gel–sol) | Syringeability | |
| Ch1 | 1.0 | 0.45 | – | No gel | No gel | Easily |
| Ch2 | 1.0 | 0.55 | – | No gel | No gel | Easily |
| Ch3 | 1.5 | 0.45 | 7.29 | 50 | + | Drop-wise |
| Ch4 | 1.5 | 0.55 | 7.34 | 37 | + | Drop-wise |
| Ch5 | 2.0 | 0.45 | 7.30 | 8 | + | Hardly |
| Ch6 | 2.0 | 0.55 | 7.35 | 4 | – | Hardly |
| Ch7 | 1.0 | 0.45 | 7.36 | >100 | + | Easily |
| Ch8 | 1.0 | 0.55 | 7.44 | >100 | + | Easily |
| Ch9 | 1.5 | 0.45 | 7.37 | 55 | + | Drop-wise |
| Ch10 | 1.5 | 0.55 | 7.44 | 40 | + | Drop-wise |
| Ch11 | 2.0 | 0.45 | 7.38 | 3 | – | Hardly |
| Ch12 | 2.0 | 0.55 | 7.45 | 2 | – | Hardly |
aDDA of chitosan in samples Ch1 to Ch6 is 75%, while in samples Ch7 to Ch12 is 85%
bAll measurements were performed in triplicate; data are reported as means ± SD