Skip to main content

Table 4 Changes of FT-IR spectra due to the exposure to weathering condition at different exposure durations

From: Natural weathering studies of oil palm trunk lumber (OPTL) green polymer composites enhanced with oil palm shell (OPS) nanoparticles

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)