Dezembro 2016 vol. 4 num. 1 - 2nd International Seminar on Industrial Innovation in Electrochemistry

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Development of chitosan membranes for use in pem fuel cells

Lupatini, K. N. ; Schaffer, J. V. ; Machado, B. ; Silva, E. S. da ; Ellendersen, L. S. N. ; Muniz, G. I. B. ; Ferracin, R. J. ; Alves, H. J. ;

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Membranes prepared with commercial chitosan and with chitosan extracted from carapaces of freshwater shrimp were developed to be tested as low cost electrolyte in PEM-FC fuel cells. The main factors of interest of this research are related to the possibility that the biopolymer might undergo physical and chemical modifications due to amine groups (-NH2) existing in the structure. The shrimp carapaces were obtained from residues of shrimp farming in the West Region of Paraná – Brazil. Researches testing chitosan membranes as proton conductors usually apply matrices of other polymers together, forming composites with more suitable properties for this purpose. Very few studies investigate the effects of chitosan properties for obtaining these membranes and normally, membranes of commercial chitosan are utilized. In original research, it was investigated the influence of the degree of deacetylation (DDA) and the molar mass (Mv) of chitosan used in the preparation of membranes on the performance regarding proton conductivity and other properties. For obtaining chitosan and membranes, classical chemical methods were applied. The results indicate that chitosan produced in laboratory led to obtaining membranes with promising properties, presenting proton conductivity one hundred times higher when compared to those presented by commercial chitosan membranes, which are in order of 1,6 and 1,9 10-2 S.cm-¹. The significant increase in proton conductivity can be associated with the higher number and availability of -NH2 groups existent in chitosan with higher DDA and lower Mv, produced in laboratory. The versatility of chitosan and the possibility of exploration and chemical modification of its structure make it attractive for development of proton-conducting polymer membranes with very similar performance when compared to the performance presented by Nafion®.

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Palavras-chave: Fuel cell, PEM, Proton conductivity, Materials for electrolyte,

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DOI: 10.5151/chempro-s3ie2016-09

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Como citar:

Lupatini, K. N.; Schaffer, J. V.; Machado, B.; Silva, E. S. da; Ellendersen, L. S. N.; Muniz, G. I. B.; Ferracin, R. J.; Alves, H. J.; "Development of chitosan membranes for use in pem fuel cells", p. 103-116 . In: Proceedings of 2nd International Seminar on Industrial Innovation in Electrochemistry . São Paulo: Blucher, 2016. São Paulo: Blucher, 2016.
ISSN 2318-4043, DOI 10.5151/chempro-s3ie2016-09

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