Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs)
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Altres documents de l'autoria: Barjola, Arturo; Escorihuela, Jorge; Andrio, Andreu; Giménez, Enrique; Compañ, Vicente
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs)Data de publicació
2018Editor
MDPIISSN
2079-4991; 2079-4991Cita bibliogràfica
Barjola, A.; Escorihuela, J.; Andrio, A.; Giménez, E.; Compañ, V. Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs). Nanomaterials 2018, 8, 1042.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.mdpi.com/2079-4991/8/12/1042Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
The zeolitic imidazolate frameworks (ZIFs) ZIF-8, ZIF-67, and a Zn/Co bimetallic mixture
(ZMix) were synthesized and used as fillers in the preparation of composite sulfonated poly(ether
ether ketone) (SPEEK) ... [+]
The zeolitic imidazolate frameworks (ZIFs) ZIF-8, ZIF-67, and a Zn/Co bimetallic mixture
(ZMix) were synthesized and used as fillers in the preparation of composite sulfonated poly(ether
ether ketone) (SPEEK) membranes. The presence of the ZIFs in the polymeric matrix enhanced
proton transport relative to that observed for SPEEK or ZIFs alone. The real and imaginary parts
of the complex conductivity were obtained by electrochemical impedance spectroscopy (EIS), and
the temperature and frequency dependence of the real part of the conductivity were analyzed. The
results at different temperatures show that the direct current (dc) conductivity was three orders of
magnitude higher for composite membranes than for SPEEK, and that of the SPEEK/ZMix membrane
was higher than those for SPEEK/Z8 and SPEEK/Z67, respectively. This behavior turns out to be
more evident as the temperature increases: the conductivity of the SPEEK/ZMix was 8.5 × 10−3
S·cm−1
, while for the SPEEK/Z8 and SPEEK/Z67 membranes, the values were 2.5 × 10−3 S·cm−1
and 1.6 × 10−3 S·cm−1
, respectively, at 120 ◦C. Similarly, the real and imaginary parts of the complex
dielectric constant were obtained, and an analysis of tan δ was carried out for all of the membranes
under study. Using this value, the diffusion coefficient and the charge carrier density were obtained
using the analysis of electrode polarization (EP). [-]
Publicat a
Nanomaterials 2018, 8(12), 1042Proyecto de investigación
ENE/2015-69203-RDrets d'accés
info:eu-repo/semantics/openAccess
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