Solid polymer electrolytes based on chitosan and europium triflate

Autor(es)

Alves, R. ; Donoso, J. P. ; Magon, C. J. ; Silva, I. D. A. ; Pawlicka, A. ; Silva, M. M.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Non-Crystalline Solids; v. 432, p. 6-pg., 2016-01-15.

Resumo

Solid polymer electrolytes (SPEs) were obtained from chitosan plasticized with glycerol and contained europium (III) trifluoromethanesulfonate salt. The transparent samples were characterized by thermal analysis (DSC and TGA), impedance spectroscopy and electron paramagnetic resonance (EPR). The sample with 55.34 wt.% of europium triflate showed the best ionic conductivity of 1.52 x 10(-6) and 7.66 x 10(-5) S cm(-1) at 30 degrees C and 80 degrees C, respectively. The thermal analysis revealed that the degradation started at around 130-145 degrees C and the weight loss ranged from 20 to 40%. The DSC of the samples showed no T-g, but only a large endothermic peak that was centered between 160 and 200 degrees C. The EPR analysis showed a broadening of the EPR resonance lines with increasing europium contents in the chitosan membranes due to the magnetic dipole-dipole coupling and spin-spin exchange between the Eu2+ ions. Moreover, the electrolytes based on chitosan and europium triflate presented good flexibility, homogeneity, and transparency. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/19297-3 - Propriedades refletivas dos dispositivos eletrocrômicos com eletrólitos poliméricos
• Beneficiário: Agnieszka Joanna Pawlicka Maule
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs