Magalad, V. T. and Gokavi, G. S. and Ranganathaiah, C. and Burshe, M. H. and Han, C. and Dionysiou, D. D. and Nadagouda, M. N. and Aminabhavi, T. M. (2013) Polymeric blend nanocomposite membranes for ethanol dehydration-effect of morphology and membrane-solvent interactions. Journal of Membrane Science, 430. pp. 321-329. ISSN 0376-7388
Full text not available from this repository. (Request a copy)Abstract
Nanocomposite membranes (NCMs) of sodium alginate/poly(vinyl pyrrolidone) blend polymers incorporated with varying concentrations of phosphotungstic acid (H3PW12O40) (PWA) nanoparticles have been prepared and used in ethanol dehydration by the pervaporation (PV) technique. Effects of filler concentration, temperature and feed water composition have been investigated to understand the PV performance of the membranes in terms of separation factor and flux. Surface morphology/energy, free volume, collective and complex range of interactions between the permeants and membranes as well as membrane swelling were studied. Arrhenius activation parameters for diffusion and permeation have been estimated. Membranes were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), and environmental emission scanning electron microscopy (ESEM). Size of the PWA nanoparticles was determined by a particle size analyzer. Surface free energies calculated from contact angles as well as free volume and fractional free volume parameters obtained from positron annihilation lifetime spectroscopy (PALS) have been used to understand the membrane transport phenomenon in terms of membrane-permeate interactions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Activation parameter, adhesion, alcohol, alginic acid, Arrhenius, article, artificial membrane, atomic force microscopy, Atomic force microscopy, concentration response, contact angle, Contact angle, Dehydration, diffusion, diffusion coefficient, energy, Environmental emissions, Ethanol, Ethanol dehydration, Ethanol water mixtures, Evaporation, Feed water, Filler concentration, Fractional free volume, Free volume, membrane permeability, Membrane swelling, membrane transport, Membrane transport, Membranes, molecular interaction, NaAlg-PVP blend, nanocomposite membrane, Nanocomposite membranes, Nanocomposites, Nanoparticles, Organic solvents, particle size, Particle size analysis, Particle size analyzers, Permeants, pervaporation, Pervaporation, phosphotungstic acid, Phosphotungstic acid, polymer, Polymeric blends, positron annihilation lifetime spectroscopy, Positron annihilation lifetime spectroscopy, Positron annihilation spectroscopy, povidone, priority journal, PV performance, scanning electron microscopy, Scanning electron microscopy, Separation factors, Sodium, Sodium alginates, Surface free energy, temperature, thermodynamics, Vinyl pyrrolidone, water, X ray diffraction |
| Subjects: | D Physical Science > Physics |
| Divisions: | Department of > Physics |
| Depositing User: | Arshiya Kousar Library Assistant |
| Date Deposited: | 16 Oct 2019 10:52 |
| Last Modified: | 16 Oct 2019 10:52 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/9198 |
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