Proton exchange membranes based on semi-interpenetrating polymer networks of Nafion® and poly(vinylidene fluoride) via radiation crosslinking

Effect of a neutral fluorinated network on the properties of a perfluorosulfonic acid ionomer as proton exchange membrane

“…Second, their chemical stability was evaluated by monitoring the sample weight as a function of immersion time in an oxidizing solution of Fenton at 80 C. It should be noted that these conditions are significantly hardest than those generally reported in the literature (at 25 C) [19,21]. The evolution over time of the weight of Aquivion ® /FMD semiIPNs is shown in Fig.…”

“…Its combination with a network based on poly (vinylidene fluoride) (PVDF) [19,20] causes the decrease of the water uptake at 80 C from 19 to 10 wt% for Nafion ® and Nafion ® /PVDF (60/40) semi-IPN, respectively and to 6 wt% for the (20/80) composition. Simultaneously, proton conductivity decreases from 5 Â 10 À2 S/cm for Nafion ® to 5 Â 10 À3 and 10 À3 S/cm for these same semi-IPNs.…”

Super Porous Hydrogel: A Promising Gastroretentive Drug Delivery System

“…[40] Potential applications for semiIPNs that have received much attention are as solid polymerelectrolytes [41,42] for fuel cells and as soft mechanical actuators. network of a room-temperature vulcanizing (RTC) silicone.…”

A self-protection phenomenon in the Nafion membrane when it breathes in methanol-saturated air

“…Its MeOH resistivity predominantly determines the overall fuel efficiency and cell voltage of the DMFC. Until now, enormous efforts have been made to suppress the MeOH permeation in Nafion, including imbedding one-dimensional (1D) 4,5 , 2D 6,7 and 3D 8,9 materials into Nafion matrix, membrane surface modification 10-13 and introduction of cross-linking networks into membrane matrix [14][15][16] , et al Meanwhile, some researchers concentrate on the complicated sorption/migration mechanisms of liquid MeOH in the Nafion membrane. However, the performance of the current liquid-fed DMFC is optimized at the MeOH feed concentration of only ~2 M otherwise severe MeOH crossover occurs and then the cell voltage dramatically reduces.…”