Chitosan-based electrolyte composite membranes. II. Mechanical properties and ionic conductivity

摘要: Abstract Chitosan-based ion-immobilized electrolyte composite membranes have been prepared with a three-layer structure that has porous intermediate layer and two solid surface layers using glutaraldehyde as crosslinking agent. Potassium hydroxide incorporated into the of ionic functionality by two-step pathway. The conductivity these is investigated impedance spectroscopy. It found some dried load KOH between 5.5 8.5 wt.% can show in range semi-conductors (around 10 −6  S cm −1 ), their reach about −2 after being hydrated for 1 h at room temperature. Main mechanical properties: tensile strength, breaking elongation modulus evaluated. obtained results suggest order to ensure desired properties higher conductivity, be possibly used an alkaline fuel cell, ratio chitosan should selected 4 5 wt.% content potassium loaded inside inner controlled below 6 wt.%.