Principal Component Analysis of the Hydroxymethylation of Sugarcane Lignin: A Time-Depending Study by FTIR
- 1 February 1999
- journal article
- research article
- Published by Taylor & Francis in Journal of Wood Chemistry and Technology
- Vol. 19 (1-2) , 151-165
- https://doi.org/10.1080/02773819909349605
Abstract
The hydroxymethylation of Acetosolv lignin from sugarcane bagasse was studied at 40°C between 0.25 and 8 h by Fourier-transformed infrared spectroscopy (FTIR). Principal Component Analysis (PCA) of the spectra has determined that addition of formaldehyde to the lignin fragments was completed within 4 h. After that time, only condensation of the fragments occurs, leading to a resol-type crosslinked resin. PCA performed in selected regions of the FTIR spectra showed that the same results are also obtained for the stretching region of O-H and C-H within the range from 2800 to 3800 cm−1, which is not usually considered in the spectroscopic evaluations of modified lignins.Keywords
This publication has 7 references indexed in Scilit:
- Multivariate characterization of pulpNordic Pulp & Paper Research Journal, 1995
- Cold‐setting wood adhesives from kraft hardwood ligninJournal of Applied Polymer Science, 1994
- Study on the kinetics of lignin methylolationJournal of Applied Polymer Science, 1993
- Multivariate characterization of pulpNordic Pulp & Paper Research Journal, 1991
- Comparison of the Reaction Rates of the Alkali-Catalyzed Addition of Formaldehyde to Phenol and Selected LigninsJournal of Wood Chemistry and Technology, 1988
- The Modification of Lignin at Positions 2 and 6 of the Phenylpropanoid Nucleii - Part II1: Hydroxymethylation of Lignin Model CompoundsJournal of Wood Chemistry and Technology, 1988
- An introduction to multivariate calibration and analysisAnalytical Chemistry, 1987