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Study on Structure and Properties of Chemically Treated Wood

Research Project

Project/Area Number 02452256
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 林産学
Research InstitutionKyoto University

Principal Investigator

NORIMOTO Misato  Kyoto University, Wood Research Institute, Professor, 木質科学研究所, 教授 (20027163)

Co-Investigator(Kenkyū-buntansha) MINAT Kazuya  Kyoto University, Faculty of Agriculture, Instructor, 農学部, 助手 (10026601)
MOROOKA Toshiro  Kyoto University, Wood Research Institute, Associate Professor, 木質科学研究所, 助教授 (00192378)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1991: ¥800,000 (Direct Cost: ¥800,000)
KeywordsChemical Modification / Dimensional Stabilization / Mechanosorptive Creep / Specific Young's Modulus / Internal Friction / Dielectric Constant / Crosslinkang / Bulking / 誘電損失 / 一級水酸基 / 誘電緩和 / ホルマ-ル化 / アセチル化 / WPC処理 / 振動的性質 / 抗膨潤能 / 力学モデル / 強度的性質
Research Abstract

Chemical treatments are one of effective approach to control woood properties. To reduce some defects, enhance its prpperties, and create new performance or functions, it is imprtant to have a clear understanding of the relationship between the structural modifications of the cell wall material and changes in properties. Chemically treated woods were cassified according to a double criterion, modification of the cell lumens and modification of the cell wall materials. For fourteen different types of chemically treated wood, adsorption tests, dimensional stabilization tests, static bending tests, mechanosorptive creep tests, dynamic viscoelastic measurements, and dielectric measurements were performed. The filling lumens partially or totally with hydrophobic chemicals was effective to to improve rigidity and strength. Modification of the cell wall at the molecular level was required to affect either moisture expansion or mechaosorptive creep. In the case of treatments that induced cross … More linking, a good correlation could be expected to reduce both moisture expansion and mechanosorptive creep. The hydrophilic bulking of the cell wall alone induced low moistrue expansion and high mechanosorptive creep. In all types of the treatments except for vapor phase formalization, a decrease of specific Young's modulus would be expected, because bulking of the cell wall either reduced the molecular cohesion, or improved it, but not enough to compensate for the increase in density. The dependency of internal friction on the type of treatment was close to that of mechanosorptive creep because both measurements were related to viscous movement of molecules. Dielectric measurements gave information on the formation of chemical bonding or interaction between hydroxyl group in the cell wal molecules and chemicals introduced into the cell wall. Numerical analysis by using the models proposed clarified contitatively the effects of structure on such properties as specific Young's modulus, internal friction and dielectric constant. Less

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 則元 京: "新しい材料としての木材の可能性" 木材保存. 16. 772-775 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 秋津 裕志: "化学処理木材の振動特性" 木材学会誌. 37. 590-597 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 湊 和也: "Dimensional Stabilizatation of MediumーDensity Fiberboard by Formaldehyde Treatment" 木材学会誌. 38. 67-72 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 井上 雅文: "熱処理による圧縮変形の永久固定" 木材研究・資料. No.27. 31-40 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 則元 京: "Rheological Properties of Chemically Modified Wood" Wood and Fiber Science.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 秋津 裕志: "Effect of Humidity on Vibrational Properties of Chemically Modified Wood" Wood and Fiber Science.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Norimoto, Misato: "Possibilities of Wood as a New Material" Wood Preservation. 16. 772-775 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akitsu, Hiroshi: "Vibrational Properties of Chemically Modified Wood" Mokuzai Gakkaishi. 37. 590-597 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Inoue, Masafumi: "Permanent Fixation of Compressive Deformation in Wood by Heat Treatment" Wood Research and Technical Notes. No. 27. 31-40 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Minato, Kazuya: "Dimensional Stabilization of Medium-Density Fiberboard by Formaldehyde Treatment" Mokuzai Gakkaishi. 38. 67-72 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Norimoto, Misato: "Rheological Properties of Chemically Modified Wood" Wood and Fiber Science.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akitsu, Hiroshi: "Effect of Humidity on Vibrational Properties of Chemically Modified Wood" Wood and Fiber Science.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 秋津 裕志: "化学処理木材の振動特性" 木材学会誌. 37. 590-597 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 湊 和也: "Dimensional Stabilizatation of MediumーDensity Fiberboard by Formaldehyde Treatment" 木材学会誌. 38. 67-72 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 井上 雅文: "熱処理による圧縮・変形の永久固定" 木材研究・資料. No.27. 31-40 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 秋津 裕志: "Effect of Humidity on Vibrational Properties of Chemically Modified Wood" Wood and Fiber Science.

    • Related Report
      1991 Annual Research Report
  • [Publications] 湊 和也: "環状オキシメチレンを用いた楽器用材の寸法安定性及び音響特性の改良(第1報)トリオキサンによるホルマ-ル化" 木材学会誌. 36. 860-866 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 湊 和也: "環状オキシメチレンを用いた楽器用材の寸法安定性及び音響特性の改良(第2報)テトラオキサンによるホルマ-ル化" 木材学会誌. 36. 990-996 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 秋津 裕志: "化学処理木材の振動特性" 木材学会誌.

    • Related Report
      1990 Annual Research Report
  • [Publications] 則元 京: "Rheological Properties of Chemically Modified Wood:Relationship Between Dimensional and Creep Stability" Wood and Fiber Science.

    • Related Report
      1990 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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