The aim of this work consists in to incorporate organic compounds as PAMAM (Polyamidoamine) dendrimers into the polymeric Nafion matrix to prepare composite membranes as a possible alternative to reduce methanol crossover effect. Composite Nafion membranes were prepared using a 3 wt% of Generation-4 hydroxyl-terminated PAMAM (G4OH) dendrimers containing 64-terminal OH-functional groups. The influence of PAMAM-(G4OH) dendrimer on chemicalephysical properties of the composite membrane was highlighted resulting in a reduction of the methanol permeability (1.05 106 cm2 s1) if compared to a recast bare Nafion membrane (8.19 106 cm2 s1), used as a reference. Good proton conductivity was also observed for PAMAM-(G4OH) composite membrane. The polarization curves carried out at 100 C in the presence of 2 M methanol have revealed the higher performance of the PAMAM-(G4OH) membrane when compared to a recast Nafion membrane.
Composites membranes based on Nafion and PAMAM dendrimers for PEMFC applications
A Carbone;E Passalacqua;
2014
Abstract
The aim of this work consists in to incorporate organic compounds as PAMAM (Polyamidoamine) dendrimers into the polymeric Nafion matrix to prepare composite membranes as a possible alternative to reduce methanol crossover effect. Composite Nafion membranes were prepared using a 3 wt% of Generation-4 hydroxyl-terminated PAMAM (G4OH) dendrimers containing 64-terminal OH-functional groups. The influence of PAMAM-(G4OH) dendrimer on chemicalephysical properties of the composite membrane was highlighted resulting in a reduction of the methanol permeability (1.05 106 cm2 s1) if compared to a recast bare Nafion membrane (8.19 106 cm2 s1), used as a reference. Good proton conductivity was also observed for PAMAM-(G4OH) composite membrane. The polarization curves carried out at 100 C in the presence of 2 M methanol have revealed the higher performance of the PAMAM-(G4OH) membrane when compared to a recast Nafion membrane.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.