(a) Synthetic procedure for obtaining the inorganic-organic hybrid nanocomposite membranes. (b) Photograph of the 3 PMA/6PWA doped hybrid membrane.
Reaction scheme and structural model of the prepared nanocomposite hybrid films.
XRD profiles of 20TMOS-50GPTMS--xPMA/yPWA composites.
Elastic modulus of 20TMOS-50GPTMS--xPMA/yPWA composites measured at room temperature by three bending method.
[(a) and (b)] FT-IR spectra of 20TMOS-50GPTMS--xPMA/yPWA composites.
MAS NMR spectrum of the 3PMA/6PWA nanocomposite hybrid membrane.
TGA-DTA curves of 20TMOS-50GPTMS--xPMA/yPWA composites heat treated at .
SEM images of (a) 1PMA/2PWA , (b) 2PMA/4PWA , (c) 3PMA/6PWA , (d) 4PMA/8PWA , and (e) 5PMA/10PWA composites and (f) TEM image of 3PMA/6PWA doped hybrid membrane. (g)–(k) show the EDX spectra of all the prepared hybrid membranes.
Temperature dependence of conductivity of 20TMOS-50GPTMS--xPMA/yPWA hybrid membranes. Conductivity was obtained under 50% RH. The inset shows the proton conductivity of host membrane without HPA addition and Nafion® 117 under 50% RH.
(a) Cole–Cole representations of impedance data measured for 20TMOS-50GPTMS--3PMA/6PWA composite at 50% RH. (b) Typical impedance plot measured for 3PMA/6PWA doped membrane at and 90% RH. The inset shows the proton conductivities of the 3PMA/6PWA doped composite at different RHs from 50% to 90% RH at .
Hydrogen permeation rate as a function of inverse temperature for the 3PMA/6PWA nanocomposite hybrid membrane including Nafion 117 (inset picture). The permeability measurements were performed under hydrogen feed in the temperature range of .
Polarization curve displaying the current density and power density for the 3PMA/6PWA doped hybrid membrane at and 50% RH.
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