Abstract
Novel composite membranes composed of polyvinyl alcohol (PVA) as host with montmorillonite (MMT) were prepared by solution casting method. A maximum conductivity of 0.9527 S cm−1 was obtained at room temperature for the composite membrane of PVA (80)-H+MMT(20). Fourier transform infrared spectroscopy (FTIR) studies confirmed the functional groups present in the membranes. The exfoliation of composite material in polymer matrix was analyzed by X-ray diffraction (XRD) technique. The results of ion exchange capacity (IEC), water/methanol uptake, and swelling measurements were presented. The scanning electron microscopy (SEM) result also revealed uniform and homogeneous mixture of nano-composite particle of MMT. Simultaneous thermal analysis (STA) curves exposed an excellent thermal stability. Moreover, the conductivity results indicate that the prepared PVA/MMT composite membranes have a good electrochemical performance for recent trends in energy research. It is noticed that the low methanol uptake for the prepared membrane is a good candidate for the fuel cell applications.
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