Influence of double-network interpenetration on ethanol dehydration performance of PVA-based pervaporation membranes

Asmaa Selim, Nóra Valentínyi, P. Mizsey

Research output: Contribution to journalArticle

Abstract

Thermal crosslinked double-network poly (vinyl alcohol) (PVA) is prepared by applying the sequential method. The obtained membrane is characterized by thermogravimetric analysis (TGA), scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy and contact angle analyses. It is concluded from FTIR analysis, contact angle measurements and measuring of swelling degree at different feed concentrations that the interpenetrating of the second network, that is the double network (DN), decreases the hydrophilicity of the membrane, while improving the thermal behavior and stability under high temperature. For the sake of the comparison of PVA and DN-PVAs selectivity, total permeation flux, individual fluxes and pervaporation separation index are evaluated for the dehydration of ethanol solution with a feed composition of 85/15 wt% ethanol/water solution at 40–60 °C. Furthermore, the effect of feed temperature on the permeation flux is expressed by the Arrhenius relationship. The performance of DN-PVAs membrane is appraised according to the change in feed concentration and operating temperature. The ethanol concentration in the feed is 75–95 wt% the DN-PVAs has flux values in the range of 41–414 g/m 2 h and separation factor of 105–376 at the operating temperature 40–60 °C.

Original languageEnglish
Pages (from-to)1069-1081
Number of pages13
JournalChemical Papers
Volume73
Issue number5
DOIs
Publication statusPublished - May 10 2019

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Pervaporation
Dehydration
Ethanol
Fluxes
Membranes
Temperature
Permeation
Contact angle
Hot Temperature
Hydrophilicity
Fourier Analysis
Fourier Transform Infrared Spectroscopy
Angle measurement
Hydrophobic and Hydrophilic Interactions
Fourier transform infrared spectroscopy
Swelling
Thermogravimetric analysis
Fourier transforms
Alcohols
Electron microscopes

Keywords

  • Dehydration
  • Double-network
  • Pervaporation
  • Poly (vinyl alcohol)

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

Cite this

Influence of double-network interpenetration on ethanol dehydration performance of PVA-based pervaporation membranes. / Selim, Asmaa; Valentínyi, Nóra; Mizsey, P.

In: Chemical Papers, Vol. 73, No. 5, 10.05.2019, p. 1069-1081.

Research output: Contribution to journalArticle

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