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Use of thermogravimetric analysis to monitor the effects of natural laccase mediators on flax pulp
- Source :
- Bioresource Technology. 102:6554-6561
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
Abstract
- The effects of 1-hydroxybenzotriazole (HBT) and the natural laccase mediators gallic acid, caffeic acid and p-hydroxybenzoic acid, on the enzymatic bleaching of flax pulp were compared. The treatment was performed under atmospheric air and oxygen pressure, and, for the first time, monitored by thermogravimetric analysis (TGA) for comparison with chemical analysis, FTIR and X-ray diffraction (XRD) spectroscopies. Thermogravimetric data were simulated by applying a nucleation kinetic equation to a combustion model based on four pseudo-components (hemicellulose, amorphous and crystalline cellulose, and lignin). The results thus obtained show that the effects of the natural mediators are similar to those of HBT and lead to increased order in cellulose microfibril surfaces. An increase in pulp crystallinity was additionally exposed by the XRD and FTIR techniques, and a reduction in microfibril equatorial size by the XRD patterns. Simulated DTG curves were used to determine the kinetic parameters for thermal degradation.
- Subjects :
- Paper
Thermogravimetric analysis
Environmental Engineering
Bioengineering
engineering.material
Lignin
Polymerization
chemistry.chemical_compound
Crystallinity
X-Ray Diffraction
Flax
Spectroscopy, Fourier Transform Infrared
Organic chemistry
Computer Simulation
Hemicellulose
Biomass
Cellulose
Glucans
Waste Management and Disposal
Renewable Energy, Sustainability and the Environment
Pulp (paper)
Laccase
Temperature
General Medicine
Cellulose microfibril
Oxygen
Kinetics
Models, Chemical
chemistry
Chemical engineering
Thermogravimetry
engineering
Xylans
Microfibril
Crystallization
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....7c4bb5ddbf12ae11e5f6a31cfe9f346a