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Wood Science and Technology

, Volume 32, Issue 4, pp 297–308 | Cite as

Preparation of sulfuric acid-catalyzed phenolated wood resin

  • M. H. Alma
  • M. Yoshioka
  • Y. Yao
  • N. Shiraishi
Originals

Summary

Birch wood meal was phenolated in the presence of sulfuric acid used as a catalyst by changing several reaction conditions, such as, phenol-to-wood ratio, temperature, time, and catalyst concentration to make novolak-type resin. A phenol-to-wood ratio of 2–5, reaction temperature of 60–150 °C, time of 60–120 min, and acid concentration of 1–3% were found to be usable values for obtaining good enough amounts of combined phenol and less amounts of unreacted wood residue. The flow properties (flow temperature and apparent melt-viscosity) of the phenolated wood obtained increased with the increase in the amount of combined phenol, however, decreased with the increase in the moisture content and free phenol in the phenolated wood. Furthermore, it was found that the solubility of the phenolated wood in the organic solvents depended, greatly, on the hydrogen bonding strength of the solvents.

Keywords

Hydrogen Phenolated Hydrogen Bonding Sulfuric Acid Organic Solvent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • M. H. Alma
    • 1
  • M. Yoshioka
    • 2
  • Y. Yao
    • 2
  • N. Shiraishi
    • 2
  1. 1.Department of Industrial Engineering of Forestry, Faculty of ForestryUniversity of Kahramanmaras Sütçü ImamKahramanmarasTurkey
  2. 2.Department of Wood Science & Technology, Faculty of AgricultureUniversity of KyotoKyotoJapan

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