Physical properties of PVA doped with algal glycerol

Abstract

Physical behavior of membrane blends of poly(vinyl alcohol) (PVA) doped with different weight percentage (wt %) of algal glycerol is reported. Solid-state PVA/glycerol membranes were prepared by the solution casting method. Electrical impedance measurements were conducted to test the effect of varying the percentage of glycerol on the conductivity of the membranes. The measurements were made in the frequency and temperature ranges 1 Hz-1 MHz and 303-423 K, respectively. It was observed that the ionic conductivity increased with the increase of glycerol concentration as well as temperature. The thermal properties of the films were characterized. It was found that the thermal properties, particularly the melting point (T m ), for PVA blends exhibit a reduced value proportional to the algal glycerol content. Fourier transform infrared spectroscopy was utilized to evaluate the interactions between the glycerol and PVA.

Fabrication and characterization of poly(vinyl alcohol)—Glycerol—Spinel ferrites flexible membranes

“…This process arises at high frequencies where the movement of ions is minimal due to their high relaxation time. It should be noted here that the second semicircle in Figure (a) can be related to the mass migration process where ionic species exhibit large relaxation time thus they diffuse to the electrodes where they accumulate …”

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Ultrasensitive and low temperature gas sensor based on electrospun organic-inorganic nanofibers

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