Pervaporation separation of isopropanol–water mixtures using mixed matrix blend membranes of poly(vinyl alcohol)/poly(vinyl pyrrolidone) loaded with phosphomolybdic acid
Mukund G. Mali
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Search for more papers by this authorVeeresh T. Magalad
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Search for more papers by this authorCorresponding Author
Gavisiddappa S. Gokavi
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Department of Chemistry, Shivaji University, Kolhapur 416004, India===Search for more papers by this authorTejraj M. Aminabhavi
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Search for more papers by this authorK. V. S. N. Raju
Organics and Coatings Division, Indian Institute of Chemical Technology, Hyderabad 500007, India
Search for more papers by this authorMukund G. Mali
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Search for more papers by this authorVeeresh T. Magalad
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Search for more papers by this authorCorresponding Author
Gavisiddappa S. Gokavi
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Department of Chemistry, Shivaji University, Kolhapur 416004, India===Search for more papers by this authorTejraj M. Aminabhavi
Department of Chemistry, Shivaji University, Kolhapur 416004, India
Search for more papers by this authorK. V. S. N. Raju
Organics and Coatings Division, Indian Institute of Chemical Technology, Hyderabad 500007, India
Search for more papers by this authorAbstract
Mixed matrix membranes of poly(vinyl alcohol) and poly(vinyl pyrrilidone) blends were prepared by loading with phosphomolybdic acid (PMA) and their pervaporation (PV) properties were investigated for the PV separation of isopropanol. Membrane performance shown a dependence on the extent of PMA loading. The 4 wt % PMA-loaded blend membrane had the highest separation factor of 29991, which declined considerably at higher loading. The flux of 4 wt % PMA-loaded membrane was lower than that of nascent blend membrane. Feed water composition and temperature influenced the PV performance. Solubility selectivity was higher than diffusion selectivity. Degree of swelling was smaller after PMA loading exhibiting better separation ability. The PV results were analyzed using the Flory-Huggins theory and sorption was dominated by Langmuir's mode. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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