Treatment | Wave numbers (cm-1) | Assignments and Remarks | ||
---|---|---|---|---|
0 month | 6 months | 12 months | ||
Dried OPTL | 3419 | 3415 | 3419 | stretching vibrations of O-H bond in cellulose (Pandey and Pitman 2003) |
2922 | 2925 | 2925 | CH2 asymetry stretching (Pandey and Pitman 2003) | |
2358 | 2360 | - | 2360-2358 (C = O stretching due to presence of carbondioxide) (Devi and Maji 2012) | |
1641 | 1636 | 1639 | - 1641 (amide (N-C = O) (Devi and Maji 2012) | |
- 1636 (C = O, C = C) (Devi and Maji 2012) | ||||
- 1639 (C = O, C = C) (Devi and Maji 2012) | ||||
- | - | 1253 | 1253 (Guaiacyl ring structure lignin) (Pandey and Pitman 2003) | |
1047 | 1047 | 1046 | 1047-1046 (silicate minerals (Si-O bonds) (Georgokapoulos et al. 2003) | |
608 | 608 | 613 | presence of poly hydroxyl groups (Klinkaewnarong and Maensiri 2010) | |
PF impregnated | 3412 | 3414 | 3423 | stretching vibrations of O-H bond in cellulose (Pandey and Pitman 2003) |
2924 | 2919 | 2923 | CH2 asymetry stretching (Pandey and Pitman 2003) | |
1620 | 1640 | 1639 | - 1620 (OH bending) (Devi and Maji 2012) | |
- 1640 (amide (N-C = O) (Devi and Maji 2012) | ||||
- 1639 (OH stretching linked water to cellulose) (Pandey and Pitman 2003) | ||||
- | - | 1462 | 1462 (C-H deformation and aromatic ring vibration) (Sun et al. 1999) | |
1246 | - | - | destruction of the guaiacyl units (Sun et al. 1999) | |
1045 | 1046 | 1045 | - 1045 (silicate minerals (Si-O bonds) (Georgokapoulos et al. 2003) | |
- 1046 (silicate minerals (Si-O bonds) (Georgokapoulos et al. 2003) | ||||
- | 891 | - | - (CH deformation in cellulose) (Pandey and Pitman 2003) | |
608 | 610 | 606 | poly hydroxy groups (Klinkaewnarong and Maensiri 2010) | |
PF-NP impregnated | 3740 | 3412 | 3413 | 3412-3413 stretching vibrations of O-H bond in cellulose) (Pandey and Pitman 2003) |
3435 | - | - | (N-H stretching) (Pongjanyakul et al. 2009) | |
2925 | 2914 | 2921 | - 3435 (N-H stretching) (Pongjanyakul et al. 2009) | |
- 2925-2914 (CH2 asymetry stretching) (Pandey and Pitman 2003) | ||||
1637 | 1606 | 1640 | - 1637 (C = O, C = C) (Sun et al. 1999) | |
- 1606 (aromatic skeleton vibration in lignin) (Sun et al. 1999) | ||||
- 1640 (amide (N-C = O) (Devi and Maji 2012) | ||||
- | - | 1467 | 1467 (C-H deformations and aromatic ring vibrations) (Sun et al. 1999) | |
- | 1118 | 1120 | - 1118 (Aromatic skeletal and C-O stretching) (Sun et al. 1999) | |
- 1120 (stretching vibration of Si-O-Si linkage) (Galeener 1979) | ||||
1045 | 1046 | 1046 | 1046-1045 (silicate minerals (Si-O bonds) (Georgokapoulos et al. 2003) | |
- | - | 894 | (CH deformation in cellulose) (Pandey and Pitman 2003) | |
- | 613 | 610 | - 613 (poly hydroxy groups) (Klinkaewnarong and Maensiri 2010) | |
- 610 (poly hydroxy groups) (Klinkaewnarong and Maensiri 2010) | ||||
589 | - | - | The zbend of N2O (Klinkaewnarong and Maensiri 2010) |