A new polyfunctional acid material for solid state proton conductivity in dry environment: Nafion doped with difluoromethandiphosphonic acid

Extruded Poly(ethylene–co–vinyl alcohol) Composite Films Containing Biopolymers Isolated from Municipal Biowaste

“…is the blend vapor and liquid water sorption. This property, coupled to the thermal and mechanical properties of the films, might disclose interesting perspectives for use of the EVOH‐SLP blends in the separation of gases, [50, 51] in the textile industry, in reverse osmosis, [53] in ion exchange or proton conduction technology. Other uses may be envisaged in cases requiring water insoluble materials which can work in humid and aqueous environment, and be mechanically, chemically and dimensionally stable in water, and at the same time exhibit water permeability.…”

Proton conducting membranes in fully anhydrous conditions at elevated temperature: Effect of Nitrilotris(methylenephosphonic acid) incorporation into Nafion- and poly(styrenesulfonic acid)

“…about 5×10 -5 S cm -1 (actually this value is extrapolated from the values measured at 90 and 110°C). In an earlier study other authors have measured Nafion conductivity at 100°C as a function of relative humidity under controlled humidification at equilibrium [54]. Extrapolating those data it results that a conductivity of about 5×10 -5 S cm -1 corresponds to a relative humidity below 2%, meaning that nearly anhydrous conditions were indeed attained after the above noted thermal treatment under vacuum.…”

Preparation and characterization of directional conducting and lower methanol permeable ultrathin membrane based on poly (vinyl alcohol) and imidazolium compounds

“…As shown in Fig. 6C, the measured IEC values for undirectional conducting membrane and directional conducting membrane are 0.96 mmol g À1 and 1.12 mmol g À1 respectively, which are higher than that of Nafion 117 (0.9 mmol g À1 ) [51,52]. The IEC value of directional conducting membrane is slightly larger than that of undirectional conducting membrane, but the proton conductivity of directional conducting membrane is almost double that of the undirectional conducting membrane at the same temperature.…”