Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs)
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Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs)

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Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs)

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dc.contributor.author Barjola, Arturo
dc.contributor.author Escorihuela Fuentes, Jorge
dc.contributor.author Andrio, Andreu
dc.contributor.author Giménez, Enrique
dc.contributor.author Compañ, Vicente
dc.date.accessioned 2019-06-10T13:13:09Z
dc.date.available 2019-06-10T13:13:09Z
dc.date.issued 2018
dc.identifier.uri https://hdl.handle.net/10550/70380
dc.description.abstract 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 x 10-3 S·cm-1, while for the SPEEK/Z8 and SPEEK/Z67 membranes, the values were 2.5 x 10-3 S·cm-1 and 1.6 x 10-3 S3cm-1, respectively, at 120 ºC. Similarly, the real and imaginary parts of the complex dielectric constant were obtained, and an analysis of tan d 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).
dc.language.iso eng
dc.relation.ispartof Nanomaterials, 2018, vol. 8, num. 12, p. 1042
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Barjola, Arturo Escorihuela Fuentes, Jorge Andrio, Andreu Giménez, Enrique Compañ, Vicente 2018 Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs) Nanomaterials 8 12 1042
dc.subject Compostos organometàl·lics
dc.subject Electroquímica
dc.title Enhanced Conductivity of Composite Membranes Based on Sulfonated Poly(Ether Ether Ketone) (SPEEK) with Zeolitic Imidazolate Frameworks (ZIFs)
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-06-10T13:13:10Z
dc.identifier.doi https://doi.org/10.3390/nano8121042
dc.identifier.idgrec 133090

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