Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
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Toru Kanbayashi
Abstract
Japanese cedar (Cryptomeria japonica) was treated with the ionic liquid (IL) 1-ethyl-3-methylimidazolium chloride ([C2mim][Cl]), which is a solvent for cellulose, and the changes in the chemical components and their distribution in wood cell walls have been investigated by Raman microscopy. Raman spectra, recorded from various areas of the cell walls, showed that lignin in the compound middle lamellae (CML) and cell corners (CC) was resistant to the reaction with [C2mim][Cl], but its molecular structure changed partially. The reactivity of cellulose and hemicelluloses with [C2mim][Cl] was higher than that of lignin in the cell wall, and the cell wall structure was maintained even in an advanced state of the reactions. The effects of [C2mim]-[Cl] on cellulose and hemicelluloses in the cell wall were homogeneous, whereas that of lignin was inhomogeneous.
Acknowledgments
The authors wish to thank the Kyoto Municipal Institute of Industrial Technology and Culture for its assistance with the Raman microscopic analysis. This research was partly supported by a Grant-in-Aid for Scientific Research (c) (25450246) from JSPS, for which the authors are grateful.
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©2015 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- Original Articles
- Characterization of dissolved lignins from acetic acid Lignofibre (LGF) organosolv pulping and discussion of its delignification mechanisms
- Organic materials in black liquors of soda-AQ pulping of hot-water-extracted birch (Betula pendula) sawdust
- Effects of concentration and temperature on the rheological behavior of concentrated sodium lignosulfonate (NaLS) solutions
- Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
- Isolation and structural elucidation of norlignan polymers from the heartwood of Cryptomeria japonica
- Effect of ball milling on lignin polyesterification with ε-caprolactone
- Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)
- Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties
- Numerical analysis of temperature profiles during thermal modification of wood: chemical reactions and experimental verification
- Fast online NIR technique to predict MOE and moisture content of sawn lumber
- Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech
- Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property
- Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra
- Mechanical stability of superhydrophobic epoxy/silica coating for better water resistance of wood
- Short Note
- Urea-formaldehyde resin penetration into Pinus radiata tracheid walls assessed by TEM-EDXS
- Obituary
- Professor Dr. Arnis Treimanis
Artikel in diesem Heft
- Frontmatter
- Original Articles
- Characterization of dissolved lignins from acetic acid Lignofibre (LGF) organosolv pulping and discussion of its delignification mechanisms
- Organic materials in black liquors of soda-AQ pulping of hot-water-extracted birch (Betula pendula) sawdust
- Effects of concentration and temperature on the rheological behavior of concentrated sodium lignosulfonate (NaLS) solutions
- Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
- Isolation and structural elucidation of norlignan polymers from the heartwood of Cryptomeria japonica
- Effect of ball milling on lignin polyesterification with ε-caprolactone
- Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)
- Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties
- Numerical analysis of temperature profiles during thermal modification of wood: chemical reactions and experimental verification
- Fast online NIR technique to predict MOE and moisture content of sawn lumber
- Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech
- Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property
- Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra
- Mechanical stability of superhydrophobic epoxy/silica coating for better water resistance of wood
- Short Note
- Urea-formaldehyde resin penetration into Pinus radiata tracheid walls assessed by TEM-EDXS
- Obituary
- Professor Dr. Arnis Treimanis
