Thermal stability of lignin in ground pulp (GP) and the effect of lignin modification on GP’s thermal stability: TGA experiments with dimeric lignin model compounds and milled wood lignins
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Daisuke Ando
,
Fumiaki Nakatsubo
Abstract
For ground pulp (GP) utilization in wood fiber composites as reinforced material, its thermal behavior is relevant. The contribution of lignin to thermal performance of GP from Pinus densiflora was the focus of the present study. Dimeric lignin model compounds and isolated milled wood lignins (MWLs) from three sources were submitted for thermogravimetric analysis (TGA). The temperatures leading to 1% weight loss (T per 1% WL) for the material were determined. The thermal stability of β-O-4 models was the lowest. Among the MWLs, the abaca MWL with its high β-O-4 content was the least thermostable. An acetylated nonphenolic β-O-4 lignin model compound showed that acetylation improves the thermal stability of this type of dimeric models. The acetylation of benzylic OH groups in β-O-4 linkages is especially relevant for the thermal resistance, which was also shown based on pre-acetylated benzylic OH groups in the GP before the total acetylation.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) (Funder Id: 10.13039/501100001863, Grant Number P09010, Japan), by a Grant-in-Aid for JSPS Fellows (Grant Number 15J09745) and by JSPS Overseas Research Fellowships.
Employment or leadership: None declared.
Honorarium: None declared.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Articles
- Accessing the natural variation of the abundances of major lignans in the heartwood of Taiwania cryptomerioides by 1H-NMR and LC-MS profiling
- Rapid detection of several endangered agarwood-producing Aquilaria species and their potential adulterants using plant DNA barcodes coupled with high-resolution melting (Bar-HRM) analysis
- Changes in sorption and electrical properties of wood caused by fungal decay
- Effect of hardening parameters of wood preservatives based on tannin copolymers
- In situ polymerization of 2-hydroxyethyl methacrylate (HEMA) and 3-(methacryloxy)propyltrimethoxysilane (MAPTES) in poplar cell wall to enhance its dimensional stability
- Isolation of pure pinosylvins from industrial knotwood residue with non-chlorinated solvents
- Towards better UV-blocking and antioxidant performance of varnish via additives based on lignin and its colloids
- Thermal stability of lignin in ground pulp (GP) and the effect of lignin modification on GP’s thermal stability: TGA experiments with dimeric lignin model compounds and milled wood lignins
- Preparation, structural changes and adsorption performance of heavy metal ions on sulfonated cellulose with varying degrees of substitution
- Mass transport and yield during spinning of lignin-cellulose carbon fiber precursors
Articles in the same Issue
- Frontmatter
- Original Articles
- Accessing the natural variation of the abundances of major lignans in the heartwood of Taiwania cryptomerioides by 1H-NMR and LC-MS profiling
- Rapid detection of several endangered agarwood-producing Aquilaria species and their potential adulterants using plant DNA barcodes coupled with high-resolution melting (Bar-HRM) analysis
- Changes in sorption and electrical properties of wood caused by fungal decay
- Effect of hardening parameters of wood preservatives based on tannin copolymers
- In situ polymerization of 2-hydroxyethyl methacrylate (HEMA) and 3-(methacryloxy)propyltrimethoxysilane (MAPTES) in poplar cell wall to enhance its dimensional stability
- Isolation of pure pinosylvins from industrial knotwood residue with non-chlorinated solvents
- Towards better UV-blocking and antioxidant performance of varnish via additives based on lignin and its colloids
- Thermal stability of lignin in ground pulp (GP) and the effect of lignin modification on GP’s thermal stability: TGA experiments with dimeric lignin model compounds and milled wood lignins
- Preparation, structural changes and adsorption performance of heavy metal ions on sulfonated cellulose with varying degrees of substitution
- Mass transport and yield during spinning of lignin-cellulose carbon fiber precursors
