Abstract
Wood-water interactions affect durability and performance of wood products, such as dimensional stability and biodegradation. To upgrade wood, a combined modification via hemicellulose extraction and furfurylation was proposed to inhibit wood-water interactions. More intense hemicellulose extraction caused larger voids and led to higher pore volume. The increment of porosity resulted in more uniform distribution of polymerized furfural resin in cells, as indicated by scanning electron microscopic and confocal laser scanning microscopic observations. The combined modification greatly reduced surface wettability with an increase of water contact angle (CA) of over 134% at 100 s. With hemicellulose extraction, polymerized furfural resin partially occupied the accommodation initially for water molecules and reduced accessible sorption sites, causing water absorption (WA) of wood to decrease by over 30% after soaking in water for 768 h. Dynamic moisture sorption was weakened after combined modification, and the moderate hemicellulose extraction combined with furfurylation reduced the moisture content by over 50% due to incorporative changes of chemical sorption sites and physical porosity. The results confirmed the efficiency of the combined modification in inhibiting wood-water interactions and indicated the importance to accurately control hemicellulose content during modification. This study could provide useful information for sustainably enhancing wood performance and upgrading low-quality wood.
Funding source: National Key Research and Development Program of China
Award Identifier / Grant number: 2017YFD0600203
Funding source: Research Start-up Funding of Nanjing Forestry University
Award Identifier / Grant number: 163020242
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: The authors acknowledge the financial support from the Research Start-up Funding of Nanjing Forestry University (163020242) and the National Key Research and Development Program of China (2017YFD0600203).
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Conflict of interest statement: The authors declare that they have no conflicts of interest regarding this article.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Original Articles
- Effect of solvent type on the formation rate of benzyl cation intermediate in acidolysis of lignin
- Evaluating efficacy of different UV-stabilizers/absorbers in reducing UV-degradation of lignin
- Inhibiting wood-water interactions by hydrothermal hemicellulose extraction combined with furfurylation
- Dimensional stability and decay resistance of clay treated, furfurylated, and clay-reinforced furfurylated poplar wood
- Improving the stability of beech wood with polyester treatment based on malic acid
- “Green technology” processing of pine (Pinus sylvestris L.) and larch (Larix sibirica Ledeb.) wood greenery to produce bioactive extracts
- Valorization of waste bark for biorefineries: chemical characterization of Eucalyptus camaldulensis inner and outer barks
- Short Notes
- Determination of chemical shifts in 6-condensed syringylic lignin model compounds
- CNT@PDMS/NW composite materials with superior electromagnetic shielding
Artikel in diesem Heft
- Frontmatter
- Original Articles
- Effect of solvent type on the formation rate of benzyl cation intermediate in acidolysis of lignin
- Evaluating efficacy of different UV-stabilizers/absorbers in reducing UV-degradation of lignin
- Inhibiting wood-water interactions by hydrothermal hemicellulose extraction combined with furfurylation
- Dimensional stability and decay resistance of clay treated, furfurylated, and clay-reinforced furfurylated poplar wood
- Improving the stability of beech wood with polyester treatment based on malic acid
- “Green technology” processing of pine (Pinus sylvestris L.) and larch (Larix sibirica Ledeb.) wood greenery to produce bioactive extracts
- Valorization of waste bark for biorefineries: chemical characterization of Eucalyptus camaldulensis inner and outer barks
- Short Notes
- Determination of chemical shifts in 6-condensed syringylic lignin model compounds
- CNT@PDMS/NW composite materials with superior electromagnetic shielding