| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 4.15 MB | Adobe PDF |
Orientador(es)
Resumo(s)
Electro-optical devices that work in a similar fashion as PDLCs (polymer-dispersed liquid crystals), produced from celulose 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.
Descrição
Palavras-chave
Cellulose nanocomposite Dielectric spectroscopy Impedance spectroscopy Liquid crystal Optical transmission
Contexto Educativo
Citação
MAXIMEAN, Doina Manaila; [et al] – Electrical properties of a liquid crystal dispersed in an electrospun cellulose acetate network. Beilstein Journal of Nanotechnology. ISSN 2190-4286. Vol. 9 (2018), pp. 155-163
Editora
Beilstein-Institut