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Proton conducting electrospun sulfonated polyether ether ketone graphene oxide composite membranes

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Proton conducting electrospun sulfonated polyether ether ketone graphene oxide composite membranes

dc.contributor.author	Reyes Rodríguez, José Luis
dc.contributor.author	Escorihuela Fuentes, Jorge
dc.contributor.author	García Bernabé, Abel
dc.contributor.author	Giménez, Enrique
dc.contributor.author	Solorza-Feria, Omar
dc.contributor.author	Compañ, Vicente
dc.date.accessioned	2018-09-05T13:43:12Z
dc.date.available	2018-09-05T13:43:12Z
dc.date.issued	2017
dc.identifier.citation	Reyes Rodríguez, José Luis Escorihuela Fuentes, Jorge García Bernabé, Abel Giménez, Enrique Solorza-Feria, Omar Compañ, Vicente 2017 Proton conducting electrospun sulfonated polyether ether ketone graphene oxide composite membranes Rsc Advances 7 84 53481 53491
dc.identifier.uri	http://hdl.handle.net/10550/67409
dc.description.abstract	A series of novel composite membranes, based on sulfonated poly(ether ketone) (SPEEK) with a graphene oxide (GO) layer, were prepared. One contained a GO layer sandwiched between the SPEEK-polyvinyl alcohol (PVA) matrix (SPEEK/PVA@GO), and another deposited thin layers of GO on the nanofibers of SPEEK-polyvinyl butyral (PVB), with both sandwiched in the phase matrix of SPEEK-PVA (SPEEK/PVA@GO-NF). Various nanofiber thicknesses were studied by varying the electrospinning time. The prepared composite membranes with different nanofiber thicknesses were characterized by scanning electron microscopy, water uptake, ionic exchange capacity, thermogravimetric analysis, mechanical properties and proton conductivity. Our results showed that the proton conductivity of SPEEK/PVA@GO membranes increased with temperature, from 1 × 10−3 S cm−1 at 30 °C to 8.3 × 10−3 S cm−1 at 130 °C. These conductivity values are higher than those observed for the membrane with SPEEK/PVA@GO-NF nanofibers. However, a conductivity comparison of the different thicknesses of SPEEK/PVA@GO-NF nanofibers allowed us to conclude that conductivities increase with nanofiber thickness at all temperatures. Finally, the calculated activation energy of the SPEEK/PVA@GO membrane (1.4 kJ mol−1) was found to be one order of magnitude lower than that for pure SPEEK/PVA (17.3 kJ mol−1). This reduction indicated that the influence of temperature on the conductivity decreases when GO is inserted into SPEEK/PVA membranes. In the case of the SPEEK/PVA@GO-NF membrane, the activation energy decreased as a function of the nanofiber network's thickness.
dc.language.iso	eng
dc.relation.ispartof	Rsc Advances, 2017, vol. 7, num. 84, p. 53481-53491
dc.subject	Ciència dels materials
dc.subject	Enginyeria industrial
dc.title	Proton conducting electrospun sulfonated polyether ether ketone graphene oxide composite membranes
dc.type	journal article	es_ES
dc.date.updated	2018-09-05T13:43:12Z
dc.identifier.doi	10.1039/C7RA10484G
dc.identifier.idgrec	126746
dc.rights.accessRights	open access	es_ES