Table 4.
FTIR bands of the films.
| Samples |
Amide A (cm−1) |
Amide I (cm−1) |
Amide II (cm−1) |
Amide III (cm−1) |
|---|---|---|---|---|
| O–H stretching vibration | C=O stretching | Bending vibration N-H group, stretching vibration of C-N group. | Stretching vibration of C-N bands and N-H groups of bound amide, vibration of C-H groups of glycine | |
| GEL | 3308 | 1653 | 1553 | 1240 |
| GEL/HPMC | 3345 | 1670 | 1575 | 1220 |
| GEL/CMC | 3304 | 1639 | 1543 | 1228 |
| GEL/HPMC/CMC-1 | 3324 | 1647 | 1548 | 1239 |
| GEL/HPMC/CMC -2 | 3321 | 1645 | 1546 | 1237 |
| GEL/HPMC/CMC-3 | 3288 | 1628 | 1542 | 1235 |