Molecular weight distributions of acetylated lignocellulosic biomasses recovered from an ionic liquid system
-
Chen Qu
,
Masahiro Hamada
Abstract
Recently, a method was presented for the dissolution and nuclear magnetic resonance analysis of cell wall components in lignocellulosic biomass, which involves cell wall ball-milling, dissolution in ionic liquids (ILs), in situ acetylation, and the recovery of acetylated materials. However, the dissolution in ILs and the relatively long ball-milling times may partially degrade the plant cell wall components. In the present study, the molecular weight (MW) distributions of acetylated biomasses from fir (Abies sachalinensis), birch (Betula platyphylla), and bamboo (Phyllostachys nigra) recovered from IL systems were examined by size exclusion chromatography. The effects of IL types, cosolvents, dissolution temperatures and times, and ball-milling times were evaluated. The MW of acetylated fir woods recovered from 1-allyl-3-methylimidazolium chloride at 30–80°C or from 1-butyl-3-methylimidazolium chloride at 100°C for 2 h were similar to those materials that were recovered from the N-methylimidazole/dimethyl sulfoxide system. In contrast, a significant decrease in MW was observed with 1-ethyl-3-methylimidazolium acetate ([Emim]OAc) even at 30°C. The degradation of cell wall components in [Emim]OAc was reduced to some extent in the presence of N,N-dimethylacetamide or pyridine. The MW decreased gradually with increased ball-milling time.
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©2013 by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
- Masthead
- Reviews
- Influence of the moisture content on the fracture characteristics of welded wood joint. Part 1: Mode I fracture
- Influence of the moisture content on the fracture characteristics of welded wood joint. Part 2: Mode II fracture
- Original Articles
- Molecular weight distributions of acetylated lignocellulosic biomasses recovered from an ionic liquid system
- Multivariate-parameter optimization of the alkaline peroxide mechanical pulp (APMP) process for larch (Larix gmelinii Rupr.) using Box-Behnken design
- Characterization of fiber development in high- and low-consistency refining of primary mechanical pulp
- Mechanical performance of yew (Taxus baccata L.) from a longbow perspective
- Predicting Douglas-fir wood density by artificial neural networks (ANN) based on progeny testing information
- The influence of lathe check depth and orientation on the bond quality of phenol-formaldehyde – bonded birch plywood
- Fire resistance of wood treated with various ionic liquids (ILs)
- Evaluation of cell wall reinforcement in feather keratin-treated waterlogged wood as imaged by synchrotron X-ray microtomography (μXRT) and TEM
- Drying of beech (Fagus sylvatica L.) timber in oscillation climates: drying time and quality
- Quantification of mobilized copper(II) levels in micronized copper-treated wood by electron paramagnetic resonance (EPR) spectroscopy
- Condensed conifer tannins as antifungal agents in liquid culture
- Meetings
- Meetings
Articles in the same Issue
- Masthead
- Masthead
- Reviews
- Influence of the moisture content on the fracture characteristics of welded wood joint. Part 1: Mode I fracture
- Influence of the moisture content on the fracture characteristics of welded wood joint. Part 2: Mode II fracture
- Original Articles
- Molecular weight distributions of acetylated lignocellulosic biomasses recovered from an ionic liquid system
- Multivariate-parameter optimization of the alkaline peroxide mechanical pulp (APMP) process for larch (Larix gmelinii Rupr.) using Box-Behnken design
- Characterization of fiber development in high- and low-consistency refining of primary mechanical pulp
- Mechanical performance of yew (Taxus baccata L.) from a longbow perspective
- Predicting Douglas-fir wood density by artificial neural networks (ANN) based on progeny testing information
- The influence of lathe check depth and orientation on the bond quality of phenol-formaldehyde – bonded birch plywood
- Fire resistance of wood treated with various ionic liquids (ILs)
- Evaluation of cell wall reinforcement in feather keratin-treated waterlogged wood as imaged by synchrotron X-ray microtomography (μXRT) and TEM
- Drying of beech (Fagus sylvatica L.) timber in oscillation climates: drying time and quality
- Quantification of mobilized copper(II) levels in micronized copper-treated wood by electron paramagnetic resonance (EPR) spectroscopy
- Condensed conifer tannins as antifungal agents in liquid culture
- Meetings
- Meetings
