title: Influence of Pectin as a green polymer electrolyte on the transport properties of Chitosan-Pectin membranes.
abstract: 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)×10-6cm2/s for pure Chitosan membrane to (1.51±0.03)×10-6cm2/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 2.44×10-3S/cm, decreasing with pectin content until the composition 50/50 (v/v), in which the conductivity drops almost one order of magnitude.
authors.affiliation: Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis CONICET, Chacabuco 917, 5700 San Luis, Argentina.
authors.forename: S D
authors.initials: SD
authors.lastname: Pasini Cabello
authors.affiliation: Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis CONICET, Chacabuco 917, 5700 San Luis, Argentina.
authors.forename: N A
authors.initials: NA
authors.lastname: Ochoa
authors.affiliation: Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis CONICET, Chacabuco 917, 5700 San Luis, Argentina.
authors.forename: E A
authors.initials: EA
authors.lastname: Takara
authors.affiliation: Departamento de Termodinámica Aplicada, Universidad Politécnica de Valencia, 46022 Valencia, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Mollá
authors.affiliation: Departamento de Termodinámica Aplicada, Universidad Politécnica de Valencia, 46022 Valencia, Spain. Electronic address: vicommo@ter.upv.es.
authors.forename: V
authors.initials: V
authors.lastname: Compañ
mesh_terms: D048271:Chitosan; D004573:Electrolytes / Q000737:chemistry*; D008567:Membranes, Artificial; D010368:Pectins / Q000737:chemistry*; D011108:Polymers
chemical_list: D004573:Electrolytes; D008567:Membranes, Artificial; D011108:Polymers; D010368:Pectins; D048271:Chitosan
keywords: Biopolymeric membranes; Differential scanning calorimetry (DSC); Electrochemical techniques; Methanol permeability; Polymer electrolyte membranes (PEM); Proton conductivity