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Structure and Properties of Cellulose Derivatives with Piezoelectricity, Pyroelectricity and Ferroelectricity

Research Project

Project/Area Number 04660181
Research Category

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

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

Principal Investigator

HIRAI Nobuyuki  Shizuoka University, Fac.of Agr., Professor, 農学部, 教授 (70023439)

Co-Investigator(Kenkyū-buntansha) DATE Munehiro  Institute of Physical and Chemical Research Researcher, 生体高分子物理, 研究員 (50087409)
SUZUKI Shigehiko  Shizuoka University, Fac.of Agr., Assistant, 農学部, 助手 (40115449)
SUZUKI Kyouji  Shizuoka University, Fac.of Agr., Associate Professor, 農学部, 助教授 (00109133)
TAKI Kinji  Shizuoka University, Fac.of Agr., Professor, 農学部, 教授 (00022252)
SOBUE Nobuo  Shizuoka University, Fac.of Agr., Associate Professor, 農学部, 助教授 (50023495)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordscellulose derivatives / cyanoethylated cellulose / piezoelectricity / pyroelectricity / ferroelectricity / セルロース誘導体の電気物性 / シアノエチル化ヒドロキシエチルセルロース / 圧電緩和 / シエノエチルセルロース
Research Abstract

The purpose of the present investigation is to develop the high piezoelectric materials of cellulose derivatives. And also the possibility of ferroelectricity of cellulose derivatives has been studied. It is recognized that cyanoethylated cellulose has the highest piezoelectric modulus in the cellulose derivatives.
The results obtained are summarized as follows.
1. Cellulose derivatives with high piezoelectric modulus
The piezoelectric modulu of cellulose nitrate, cellulose acetate, cyanoethylated cellulose and cyanoethylated hydoroxyethylcellulose have been measured. The value of cyanoethylated hydroxyethylcellulose is about 1-2x10^<-11> C/N at 20゚C.The value of it is the highest in the cellulose derivatives and is approaching the value of Polyvinyl fluoride. It may be possible to use it as industrial materials with electric functions by increasing the piezoelectric porlarization.
2. Possibility of ferroelectric cellulose derivatives
D(electric displasement)-E(electric field) hysteresis loop is measured about the cyanoethylated hidroxyethylcellulose whith high piezoelectric modulus. But we could not experimentally prove the existence of ferroelectricity in cyanoethylated hydroxyethylcellulose. Because of increasement of direct current, high electric field could not be applied to the specimens. It is necessary to remove ionic and other low molecular weight impurities. Measurements of ferroelectricity of cellulose derivatives which are oriented by high drawing, or of which polar side chains are oriented by high electric field or high magnetic field are now under consideration.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Hirai,N.: "Piezoelectric Relaxation of Wood in High Temperature Region" Mokuzai Gakkaishi. 38. 820-824 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 平井信之・森田光博・鈴木養樹: "シアノエチル化木粉およびシアノエチルセルロースの電気的性質"

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Nobuyuki Hirai, Shunji Hayamura, Youki Suzuki, Katsuhiro Miyajima and Satoru Matsuyama: "Piezoelectric Relaxation of Wood in High Temperature Region" Mokuzai Gakkaishi. 38(9). 820-824 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Nobuyuki Hirai, Mitsuhiro Morita and Youki Suzuki: "Electrical Properties of Cyanoethylated Wood Meal and Cyanoethylated Cellulose" Mokuzai Gakkaishi. 39(5). 603-609 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hirai,N.: "Piezoelectric Relaxation of Wood in High Temperature Region." Mokuzaigakkaishi. 38. 820-824 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 平井信之.森田光博.鈴木養樹: "シアノエチル化木粉およびシアノエチルセルロースの電気的性質" 木材学会誌. 39. 603-609 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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