Multilayer-structured, SiO2/sulfonated poly(phenylsulfone) composite membranes for proton exchange membrane fuel cells

Sulfonated poly(phenylsulfone)/fluorinated polybenzoxazole nanofiber composite membranes for proton exchange membrane fuel cells

“…They found the introduction of the SiO 2 ceramic layer was effective in not only suppressing dimensional change but also enhancing proton conductivity of the multilayered composite membrane. And the decrease of proton conductivity at a low humidity condition was retarded [16]. Padmavathi et al introduced a SiO 2 layer between two layers of SPSu to form a multilayered composite membrane which could enhance the dimensional stability with a slightly lowered proton conductivity.…”

New approaches towards novel composite and multilayer membranes for intermediate temperature-polymer electrolyte fuel cells and direct methanol fuel cells

“…In the past 2-3 years, a wide variety of structures including variable number of layers, combination of organic and inorganic membrane layers have been investigated and reported for multilayer membranes using casting [115,116]. Padmavathi, et al [117] developed a multilayer membrane by casting, where the inner layer consisted of SiO 2 mixed with 5wt.% aminated poly(sulphone) (APSu) sandwiched between two external layers made of sulphonate poly(sulphone) (SPSu).…”

Multifunctional hydrolyzed EVA membranes with tunable microstructure and water barrier properties

“…The 1 H NMR spectra were measured using Bruker DXP 300 MHz with tetramethylsilane as a reference. Prior to measurements, the hydrolyzed EVA membranes were dissolved in DMSO-d 6 . Thermal stability of the membranes was evaluated by thermogravimetric analysis (TGA) under N 2 atmosphere by TG 209 from Netzsche instruments with a heating rate of 10 1C/min from 30 1C to 600 1C.…”

“…Multilayer polymer films have several applications in different fields: in electronic systems [1], packaging for food protection [2][3][4], separation process (pervaporation and nanofiltration) [5], as a membrane for fuel cell application [6][7][8]. Such type of structure has been intensively studied to improve thermal stability and gas barrier permeability [9], to modify the thermal behavior at the glass transition [10], to change the optical properties [11], to enhance the mechanical resistance [12] or to control the moisture sensitivity [13].…”