"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

AN EXPERIMENTAL INVESTIGATION OF ELECTROACTIVE POLYURETHANE

I. Diaconu1, A. David2, D.-O. Dorohoi2,*

Affiliation

  1. Medical Bioengineering Dept., University of Medicine and Pharmacy, Iasi, Romania
  2. Faculty of Physics, “Al. I. Cuza” University, Bd. Carol I, Nr. 11A, 700506 Iasi,, Romania

Abstract

Thickness strains in polyurethane films, induced by electrostatic field (-12 ‚ +12) MV/m were measured under ambient conditions. There were found a symmetrical strain profile and the compression along thickness for the inversion of the electric power polarity. Induced strain shows a quadratic dependence vs. electrical field up to about 3 MV/m, suggesting the electrostrictive nature of the strain response. Maximum induced strain (4.2 %) and an electrostrictive coefficient of 1.7 · 10-15 m2/V2 are quite comparable to those reported in literature on similar commercial polyurethane films. The contraction response time (~ 4.7 · 103 ms) was found smaller than that of the relaxation process. An effective compressive pressure of 0.63 MPa and a density of mechanical energy (0.013 J/cm3) were obtained. The Maxwell effect contribution of only 0.12 % was found. The investigated polyurethane offers good promise in applications such as sensors and actuators..

Keywords

Polyurethane elastomer, Electrostatic field induced strain, Electromechanical parameters.

Submitted at: Aug. 22, 2005
Accepted at: Nov. 24, 2005

Citation

I. Diaconu, A. David, D.-O. Dorohoi, AN EXPERIMENTAL INVESTIGATION OF ELECTROACTIVE POLYURETHANE, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 6, pp. 2797-2801 (2005)