Startseite Comparison of physical and thermal properties of various wood-inorganic composites (WICs) derived by the sol-gel process
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Comparison of physical and thermal properties of various wood-inorganic composites (WICs) derived by the sol-gel process

  • Ke-Chang Hung und Jyh-Horng Wu EMAIL logo
Veröffentlicht/Copyright: 17. Januar 2018
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Holzforschung
Aus der Zeitschrift Holzforschung Band 72 Heft 5

Abstract

The physical properties and thermal decomposition kinetics of wood-inorganic composites (WICs) were in focus, which were prepared from methyltriethoxysilane (MTEOS), tetraethoxysilane (TEOS) and titanium (IV) isopropoxide (TTIP) by the sol-gel process. The hydrophobicity and dimensional stability of the composites were better than those of unmodified wood (Wcontr), but the performance of SiO2-based WICs (WICSiO2) was the best. The SEM-EDX micrographs show that silica is only distributed within the cell wall of the WICSiO2. By contrast, titania was deposited principally in the cell lumens of the WICTiO2. The thermal decomposition kinetic experiments show that the average apparent activation energies with conversion rates between 10% and 70% were 156–168 (Wcontr), 178–180 (WICMTEOS), 198–214 (WICTEOS) and 199–204 (WICTTIP) kJ mol−1 at the impregnation level of 20% weight gain. The reaction order values calculated based on the Avrami theory were 0.51–0.57, 0.39–0.51, 0.36–0.47 and 0.28–0.51 in the same order of species indicated above. Accordingly, the dimensional and thermal stability of the wood could be enhanced effectively by the sol-gel process with silicon- and titanium-based alkoxides.

Keywords: activation energy; dimensional stability; methyltriethoxysilane (MTEOS); model-free isoconversional methods; reaction order; sol-gel process; tetraethoxysilane (TEOS); thermal decomposition kinetics; thermal stability; titanium (IV) isopropoxide (TTIP); wood-inorganic composites (WICs)

Acknowledgments

This work was financially supported by a research grant from the Ministry of Science and Technology, Taiwan (MOST 105-2622-B-005-002-CC3).

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: The Ministry of Science and Technology of Taiwan (MOST 105-2622-B-005-002-CC3).

  3. Employment or leadership: None declared.

  4. Honorarium: None declared.

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Received: 2017-9-27
Accepted: 2017-12-18
Published Online: 2018-1-17
Published in Print: 2018-4-25

©2018 Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Original Articles
  3. Improved permeability of autohydrolyzed poplar sapwood against sodium hydroxide for CMP production
  4. Demethylation and other modifications of industrial softwood kraft lignin by laccase-mediators
  5. Activated carbon fiber from liquefied wood and polyvinyl butyral as an additive for production of flexible all-carbon yarn supercapacitors
  6. Short Note
  7. Fire retardancy of graphene oxide/wood composite (GOW) prepared by a vacuum-pulse dipping technique
  8. Original Articles
  9. Comparison of physical and thermal properties of various wood-inorganic composites (WICs) derived by the sol-gel process
  10. Radiata pine wood treatment with a dispersion of aqueous styrene/acrylic acid copolymer
  11. Density profiles of novel kraft pulp and TMP based foam formed thermal insulation materials observed by X-ray tomography and densitometry
  12. Influence of timber moisture content on wave time-of-flight and longitudinal natural frequency in coniferous species for different instruments
  13. Dimensional changes of cell wall and cell lumens upon water sorption revisited. Literature review and mathematical considerations based on the cylindrical model
  14. Dynamic mechanical analysis (DMA) of waterlogged archaeological wood at room temperature
  15. Obituary
  16. Professor Dr. Mikhail Yakovlevich Zarubin
https://doi.org/10.1515/hf-2017-0156
Schlagwörter für diesen Artikel
activation energy; dimensional stability; methyltriethoxysilane (MTEOS); model-free isoconversional methods; reaction order; sol-gel process; tetraethoxysilane (TEOS); thermal decomposition kinetics; thermal stability; titanium (IV) isopropoxide (TTIP); wood-inorganic composites (WICs)

Artikel in diesem Heft

  1. Frontmatter
  2. Original Articles
  3. Improved permeability of autohydrolyzed poplar sapwood against sodium hydroxide for CMP production
  4. Demethylation and other modifications of industrial softwood kraft lignin by laccase-mediators
  5. Activated carbon fiber from liquefied wood and polyvinyl butyral as an additive for production of flexible all-carbon yarn supercapacitors
  6. Short Note
  7. Fire retardancy of graphene oxide/wood composite (GOW) prepared by a vacuum-pulse dipping technique
  8. Original Articles
  9. Comparison of physical and thermal properties of various wood-inorganic composites (WICs) derived by the sol-gel process
  10. Radiata pine wood treatment with a dispersion of aqueous styrene/acrylic acid copolymer
  11. Density profiles of novel kraft pulp and TMP based foam formed thermal insulation materials observed by X-ray tomography and densitometry
  12. Influence of timber moisture content on wave time-of-flight and longitudinal natural frequency in coniferous species for different instruments
  13. Dimensional changes of cell wall and cell lumens upon water sorption revisited. Literature review and mathematical considerations based on the cylindrical model
  14. Dynamic mechanical analysis (DMA) of waterlogged archaeological wood at room temperature
  15. Obituary
  16. Professor Dr. Mikhail Yakovlevich Zarubin
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