Skip to main content

Advertisement

Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Piezoelectric effect of cyanoethylated hydroxyethylcellulose

Article metrics

  • 105 Accesses

  • 10 Citations

Abstract

The piezoelectricity of cyanoethylated hydroxyethylcellulose was investigated. Elastic, piezoelectric, and dielectric relaxations were observed at −80° to −60°C and 0° to 20°C at a frequency of 10Hz. The activation energy is about 9–15 kcal/mol in the low temperature region and about 30–45 kcal/mol at room temperature. These relaxations in the low temperature region may be caused by the motion of the cyanoethyl group and those at room temperature mostly by the motions of the main chain. Cyanoethylated hydroxyethylcellulose has a high piezoelectric strain constant (d 25), which is the largest value among the cellulose derivatives and is almost the same as the value for polyvinylidene fluoride. The electromechanical coupling factor for cyanoethylated hydroxyethylcellulose was small.

References

  1. 1.

    Furukawa T (1977) Doctoral thesis, University of Tokyo, pp 99–100

  2. 2.

    Ohigashi H (1975) Electromechanical properties of polarized polyvinylidene fluoride films as studied by the piezoelectric resonance method. J Appl Phys 47:949–955

  3. 3.

    Cohen SG, Haas HC (1950) Studies on the structure of hydroxyethylcellulose. J Am Chem Soc 72:3954–3958

  4. 4.

    Lewis CW, Holgle DH (1956) The Rotation of Polar Groups in High Polymers J Polymer Sci 21:411–416

  5. 5.

    Suzuki K (1994) Synthesis of cyanoethylated cellulose derivatives Report of grant-in-aid for scientific research (C), p 4 (head investigator N. Hirai)

  6. 6.

    Sobue N, Hirai N, Asano I (1971) Studies on structure of wood by X-ray. II. Mokuzai Gakkaishi 17:44–50

  7. 7.

    Hirai N, Morita M, Suzuki Y (1993) Electrical properties of cyanoethylated wood meal and cyanoethylated cellulose. Mokuzai Gakkaishi 39:603–609

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Hirai, N., Ootake, K., Suzuki, K. et al. Piezoelectric effect of cyanoethylated hydroxyethylcellulose. J Wood Sci 44, 35–39 (1998) doi:10.1007/BF00521872

Download citation

Key words

  • Cyanoethylated hydroxyethylcellulose
  • High piezoelectric material
  • Functional cellulose derivative
  • Electromechanical coupling factor