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Topochemistry on the Property Enhancement of Wood with Inorganic Materials

Research Project

Project/Area Number 06453176
Research Category

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

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

Principal Investigator

SAKA Shiro  Kyoto University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (50205697)

Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1994: ¥6,800,000 (Direct Cost: ¥6,800,000)
KeywordsWood-inorganic composite / Topochemistry / Property enhancement / Metal alkoxide / SiO_2-P_2O_5-B_2O_3 / Fire-resisting property / Sol-gel process / Silicon alkoxide oligomer / SiO_2-P_2O_5-B_20_3 / 有機ケイ素化合物
Research Abstract

From our study on wood-inorganic composites by the sol-gel process, SiO_2 wood-inorganic composites from tetraethoxysilane (TEOS) were found to be enhanced in dimensional stability, fire-resistance and so on. To improve their properties further, multicomponent SiO_2-P_2O_5-B_2O_3) wood-inorganic composites were studied in a reaction system of TEOS/EtOH/acetic acid to which trimethylphosphite (TMP) and trimethylborate (TMB) were added. Obtained SiO_2-P_2O_5-B_2O_3 composites were superior in fire-resistance. However, (1) P_2O_5 and B_2O_3 gels are not stable against weathering and (2) TMP is not acceptable in terms of safety in environment for its production due to its offensive oder. For the problem of (1) , HFOETMOS (2-heptafluorooctylethyltrimethoxysilane) was added in a small quantity to the reaction system (1/2,000 in the molar ratio to TEOS). Concomitantly, water-repellent property was added to prevent the composites from a leaching of P_2O_5 and B_2O_3 gels. Furthermore. for (2) … More , silicon alkoxide oligomers instead of TEOS to which TMP and TMB were hydrolized and condensed, were used for preparing SiO_2-P_2O_5-B_2O_3 composites. By doing so, the production environment was improved. Additionally, this modified oligomers are so stable due to covalent bonds among Si, P,and B components that obtained SiO_2-P_2O_5-B_2O_3 gels were resistant against their leaching, and very effective for fire-resistance of wood. SiO_2 wood-inorganic composites prepared from the above reaction system to which phosphorus-containing fire-resistant agents and a small amount of HFOETMOS were added, also revealed antileachability and high fire-resistance of wood.
On TiO_2 wood-inorganic composites, composites with various types of TiO_2 distribution were prepared from titanium alkoxides and titanium chelates. Among tem, TiO_2 composites in which TiO_2 gels are distributed only within the cell walls were found to be enhanced in dimensional stability and fire-resistance, indicating that the topochemical effects exist on the property-enhancement of wood. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Saka, S.: "Wood-Inorganic Composites Prepared by the Sol-Gel process VI." Mokuzai Gakkaishi. 42. 81-86 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Miyafuji, H.: "Wood-Inorganic Composites Prepared by the Sol-Gel process V." Mokuzai Gakkaishi. 42. 74-80 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Ogiso, K.: "Wood-Inorganic Composites Prepared by the Sol-Gel process IV." Mokuzai Gakkaishi. 40. 1100-1106 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 坂志朗: "ゾル-ゲル法による木材の無機質複合化と諸機能発現のトポ化学" 木材工業. 50. 400-406 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Saka, S.: "Wood and Gellulosic Chemistry, 2nd Edition" Marcel Dekker, Inc. New York, 1400 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 坂志朗: "木質新素材ハンドブック" 木質新素材ハンドブック編集委員会編、技報堂出版, 750 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Saka, S.: "Wood-Inorganic Composites Prepared by the Sol-Gel Process VI." Mokuzai Gakkaishi. 42. 81-86 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Miyafuji, H.: "Wood-Inorganic Composites Prepared by the Sol-Gel Process V." Mokuzai Gakkaishi. 42. 74-80 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Ogiso, K.: "Wood-Inorganic Composites Prepared by the Sol-Gel Process VI." Mokuzai Gakkaishi. 40. 1100-1106 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Saka, S.: "Wood-Inorganic Composites Prepared by the Sol-Gel Process and Topochemistry for their Property Enhancement." Mokuzai Kogyo. 50. 400-406 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Saka, S.: "Wood and Cellulosic Chemistry, 2nd Edition" Marcel Dekker, Inc.1400 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Saka, S.: "Handbook of New Woody Materials" Gihodo Publisher. 750 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Saka, S.: "Wood-Inorganic Composites Prepared by the Sol-Gel process VI." Mokuzai Gakkaishi. 42. 81-86 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Miyafuji, H.: "Wood-Inorganic Composites Prepared by the Sol-Gel process V." Mokuzai Gakkaishi. 42. 74-80 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 坂志朗: "ゾル-ゲル法による木材の無機質複合化と諸機能発現のトポ化学" 木材工業. 50. 400-406 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Saka, S.: "Wood and Cellulosic Chemistry, 2nd Edition" Marcel Dekker, Inc. New Youk, 1400 (1997)

    • Related Report
      1995 Annual Research Report
  • [Publications] 坂志朗: "木質新素材ハンドブック" 木質新素材ハンドブック編集委員会編、技報堂出版, 750 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 坂 志朗: "木質新素材ハンドブック" 木質新素材ハンドブック編集委員会編、技報堂出版(未定), (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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