Influence of Pectin as a green polymer electrolyte on the transport properties of Chitosan-Pectin membranes.

Autor: Pasini Cabello SD; Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis CONICET, Chacabuco 917, 5700 San Luis, Argentina., Ochoa NA; Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis CONICET, Chacabuco 917, 5700 San Luis, Argentina., Takara EA; Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis CONICET, Chacabuco 917, 5700 San Luis, Argentina., Mollá S; Departamento de Termodinámica Aplicada, Universidad Politécnica de Valencia, 46022 Valencia, Spain., Compañ V; Departamento de Termodinámica Aplicada, Universidad Politécnica de Valencia, 46022 Valencia, Spain. Electronic address: vicommo@ter.upv.es.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2017 Feb 10; Vol. 157, pp. 1759-1768. Date of Electronic Publication: 2016 Nov 22.
DOI: 10.1016/j.carbpol.2016.11.061
Abstrakt: Novel blend membranes have been prepared from Chitosan (CH), Pectin (PEC) and their mixtures. The obtained samples were cross-linked and sulfonated before characterization. The results show that CH/PEC membranes display structural changes on the chemical and physical properties as a function of composition. DSC analysis reveals an endothermic peak due to the scission of the ionic pairs between carboxylic groups and ammonium groups, which produces a strong change on physical properties such as methanol permeability and proton conductivity. The methanol permeability decreases with the amount of Pectin from (4.24±0.04)×10 -6 cm 2 /s for pure Chitosan membrane to (1.51±0.03)×10 -6 cm 2 /s for blend CH/PEC membranes when the amount of Pectin is 50% (v/v). The proton conductivities of the blend membranes follow a similar behavior. For a pure CH membrane the conductivity is 2.44×10 -3 S/cm, decreasing with pectin content until the composition 50/50 (v/v), in which the conductivity drops almost one order of magnitude.
(Copyright © 2016 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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