Electrical properties of a liquid crystal dispersed in an electrospun cellulose acetate network

Doina Manaila Maximean, Octavian Danila, Pedro L. Almeida, Constantin Paul Ganea

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Electro-optical devices that work in a similar fashion as PDLCs (polymer-dispersed liquid crystals), produced from cellulose acetate (CA) electrospun fibers deposited onto indium tin oxide coated glass and a nematic liquid crystal (E7), were studied. CA and the CA/liquid crystal composite were characterized by multiple investigation techniques, such as polarized optical microscopy, dielectric spectroscopy and impedance measurements. Dielectric constant and electric energy loss were studied as a function of frequency and temperature. The activation energy was evaluated and the relaxation time was obtained by fitting the spectra of the dielectric loss with the Havriliak-Negami functions. To determine the electrical characteristics of the studied samples, impedance measurements results were treated using the Cole-Cole diagram and the three-element equivalent model.

Original languageEnglish
Pages (from-to)155-163
Number of pages9
JournalBeilstein Journal of Nanotechnology
Volume9
Issue number1
DOIs
Publication statusPublished - 15 Jan 2018

Keywords

  • Cellulose nanocomposite
  • Dielectric spectroscopy
  • Impedance spectroscopy
  • Liquid crystal
  • Optical transmission

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