Table 1.
The reaction conditions, yields, degree of substitution (DS), solubility and zeta potentials of quaternized chitosans (QCs).
| Sample | Volume of CHPTAC | React Time (h) | React Temperature (°C) | Yield (%) | Degree of Substitution (%) | Solubility | Zeta Potentials (mv) |
|---|---|---|---|---|---|---|---|
| QC1 | 6 | 15 | 25 | 68.9 | 32.9 | ++ | 45.8 ± 1.1 |
| QC2 | 12 | 15 | 25 | 78.6 | 36.1 | ++ | 48.1 ± 1.5 |
| QC3 | 24 | 15 | 25 | 85.2 | 44.5 | ++ | 49.6 ± 0.5 |
| QC4 | 24 | 30 | 25 | 89.7 | 46.6 | ++ | 53.8 ± 1.9 |
| QC5 | 24 | 45 | 25 | 88.5 | 46.8 | ++ | 54.2 ± 0.5 |
| QC6 | 6 | 15 | 40 | 48.7 | 25.3 | + | - |
| QC7 | 6 | 15 | 60 | 32.6 | 16.5 | - | - |