Dielectric Measurements of Polymer Electrolyte Based Composites as a Technique for Evaluation of Membrane Homogeneity

Autor:	Serguei D. Mikhailenko, Fabrício Celso, Marco Antônio Siqueira Rodrigues, Serge Kaliaguine
Rok vydání:	2014
Předmět:	chemistry.chemical_classification Materials science General Chemical Engineering Composite number Dielectric Electrolyte Polymer Dielectric spectroscopy chemistry.chemical_compound Membrane chemistry Nafion Homogeneity (physics) Electrochemistry Composite material
Zdroj:	Electrochimica Acta. 136:457-465
ISSN:	0013-4686
DOI:	10.1016/j.electacta.2014.05.040
Popis:	Three series of composite proton exchange membranes containing SiO2 as filler were prepared and studied by a.c. impedance spectroscopy. Cast membranes were based on SPEEK and Nafion polymers and one more series was obtained by Nafion impregnation via sol-gel technique. This reaction was carried out under equilibrium conditions at long diffusion time with pre-defined water and TEOS contents as a given ratio per -SO3H group. The study of electro-physical properties of composite membranes showed that the dielectric permittivity, measured using a simple probing device in different locations of a composite film, may be used not only for structural and electro-physical characterization of the materials but also as a parameter allowing to estimate homogeneity and spatial uniformity of the membranes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::74a29a771782ffefc54ff3d2f15c74b4 https://doi.org/10.1016/j.electacta.2014.05.040 Zobrazit plný text záznamu Full Text from ScienceDirect