https://doi.org/10.1140/epjp/i2018-11997-8
Regular Article
Filling in the voids of electrospun hydroxypropyl cellulose network: Dielectric investigations
1
University Politehnica of Bucharest, Department of Physics, 313 Spl. Independentei, 060042, Bucharest, Romania
2
National Institute of Materials Physics, POBox MG 07, 077125, Magurele, Romania
3
I3N - CENIMAT, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT/UNL, 2829-516, Caparica, Portugal
4
Área Departamental de Física, ISEL, Instituto Superior de Engenharia de Lisboa, I.P.L., 1959-007, Lisboa, Portugal
* e-mail: palmeida@adf.isel.pt
Received:
11
December
2017
Accepted:
14
March
2018
Published online:
23
April
2018
Here we describe an organic electro-optic device, obtained using electrospun hydroxypropyl cellulose (HPC) polymer fibres and nematic liquid crystals (LC). Its working mechanism is similar to that of a classic polymer-dispersed liquid crystal (PDLC) device. The scanning electron microscopy of the HPC deposited fibres shows a mat of fibres with diameters in the nano and micron size range. Dielectric spectroscopy measurements allow the determination of the dependence of the dielectric constant and electric energy loss on frequency and temperature as well as the determination of the activation energy. The electro-optic study shows a very good optical transmission curve, with an “on”-“off” switching voltage of less than 1V/μ m.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2018