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  • Chem Sci Trans., 2017, 6(3),  pp 405-410  

    DOI:10.7598/cst2017.1387

    Research Article

    Pervaporation Dehydration of Ethanol Using Nanocomposite Membranes Prepared from Poly(vinyl alcohol) and Poly(vinylpyrrolidone) Blends Incorporated with Cellulose Nanocrystals

  • SEEMA S. PATTANSHETTI and GAVISIDDAPPA S. GOKAVI*
  • Department of Chemistry, Shivaji University, Kolhapur 416 004, India
  • Abstract

    Pervaporation dehydration of ethanol was investigated using blend nanocomposite membranes of poly(vinyl alcohol) and poly(vinylpyrrilidone) incorporated with varying amounts of cellulose nanocrystals (CNs) as filler particles. The membranes thus prepared were cross-linked with glutaraldehyde and investigated for their PV performances as a function of filler concentration, feed water composition and temperature. The membrane characterization was done using techniques like SEM and contact angle measurements to understand their morphology and sturdiness during the PV operations. Among all the membranes tested, the membrane containing 8 wt.% CNs offered optimum values of separation factor (23976) with a reduced flux of 0.563 kg/m2h compared to that of the nascent membrane. Detailed explorations were done on the membrane that offered optimum values of PV performance in order to understand the effect feed water composition. Sorption and diffusion along with PV results were analyzed using thermodynamic models.

    Keywords

    Pervaporation, Cellulose nanocrystals, Diffusion, Sorption, Blend, Ethanol-water mixture

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