Chemical characterization and ftir spectroscopy of thermally compressed eucalyptus wood panels

Abstract

In this study, the change in the chemical properties of the thermally modified eucalyptus (Eucalyptus camaldulensis) wood boards were examined by wet chemical analysis and FTIR spectroscopy. The eucalyptus wood boards were modified with a laboratory type hot-press for four different groups at press pressures of 2 or 4 MPa and temperatures of 150°C or 180°C and compared to untreated control. After this, hot water, 1% NaOH, ethanol-cyclohexane, ethanol, and methanol-water solubility values were determined for the treated samples. In addition, the content of klason lignin, acid soluble lignin, holocellulose, and α-cellulose were investigated. The solubility values (except for the ethanol solubility) increased in the modified wood when compared to the untreated control. A decrease in the content of acid soluble lignin, holocellulose and α-cellulose was observed while the content of klason lignin in the modified wood was increased. According to the FTIR analysis results, significant changes were observed in the spectra of the modified samples. These findings were in agreement with the results of wet chemical analysis.

Preparation and characterization of nanocellulose from Albizia lebbeck sawdust and their application in nanocomposites using poly(vinyl chloride) (PVC)

“…was investigated and presented the chemical composition of selected species of exotic wood derived from the region of Africa and the results are not identical but almost similar observation with this research. Almost similar lignin, holocellulose and alpha-cellulose content in eucalyptus (Eucalyptus camaldulensis) wood was also examined and reported byGonultas et al (2018).…”

Fractionation and characterization of lignin from sugarcane bagasse using a sulfuric acid catalyzed solvothermal process

“…The signal at 1665 cm -1 corresponds to the carbonyl's vibrations in the aromatic absorption region [15]. The intensity at 1505 cm -1 showed C=C stretching in the aromatic ring absorption region [16]. The peak at 1457 and 1461 cm −1 was assigned to C-H bending vibration.…”

“…The recovered lignin and commercial organosolv lignin were characterized according to C-H stretching in CH 2 and CH at 2928 and 2936 cm -1 [13]. The absorbance at 2930 and 2898 cm -1 was associated with the vibrations of the C-H group in methyl and methylene group [14]. The vibrations at 1711 cm -1 were related to C=O stretching of carbonyl groups' absorption region in recovered lignin and commercial organosolv lignin.…”

Utilization of Trapa natans

“…Fourier Transform Infrared Spectroscopy (FTIR): FTIR analysis indicated that TN contained cellulose, hemicelluloses and lignin as expected. 3400-3330 cm -1 OH stretching of alcohols, phenols, and acids (Tjeerdsma & Militz, 2005;Müller et al, 2009;Esteves et al, 2013;Mattos et al, 2015;Missio et al, 2015;Gonultas & Candan, 2018). 2970-2820 cm -1 C-H stretching in methyl and methylene groups (Müller et al, 2009;Esteves et al, 2013;Gonultas & Candan, 2018).…”

“…3400-3330 cm -1 OH stretching of alcohols, phenols, and acids (Tjeerdsma & Militz, 2005;Müller et al, 2009;Esteves et al, 2013;Mattos et al, 2015;Missio et al, 2015;Gonultas & Candan, 2018). 2970-2820 cm -1 C-H stretching in methyl and methylene groups (Müller et al, 2009;Esteves et al, 2013;Gonultas & Candan, 2018). 1650-1652 cm -1 bands are absorbed water molecules of C=O stretching of the aromatic structures (Kotilainen et al, 2000;Nuopponen, 2005;Ozgenc et al, 2017).…”