Fabrication and characterization of polyvinylidenefluoride-co-hexafluoropropylene (PVDF-HFP) electrospun membranes for direct contact membrane distillation

Boor Singh Lalia, Elena Guillen-Burrieza, Hassan A. Arafat, Raed Hashaikeh

Research output: Contribution to journalArticle

Abstract

Polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) membranes were prepared via the electrospinning method. Three sets of mats, with different fiber diameters and physical properties, were obtained by varying polymer concentration from 10 to 15wt%. Membranes were formed by hot pressing the prepared mats to fuse the fibers. As prepared mats were hot pressed in order to control the membranes dimensional stability and mechanical strength and to alter the pore size and pore size distribution. The effects of hot pressing and variation of fiber diameter on pore size distribution, porosity, contact angle, gas permeation, and liquid water entry pressure (LEP) of the fabricated membranes were all studied. Optimized membranes were obtained with mean pore size, porosity, contact angle and LEP of 0.26μm, 58±5%, 125°±2.41 and 19.1psi, respectively. Fabricated membranes were tested for desalination by direct contact membrane distillation and a water flux value of 20-22Lh-1m-2 was obtained with a salt rejection (SR) ratio of 98%.

Original languageEnglish (US)
Pages (from-to)104-115
Number of pages12
JournalJournal of Membrane Science
Volume428
DOIs
StatePublished - Feb 1 2013

    Fingerprint

Keywords

  • Desalination
  • Electrospun membrane
  • Membrane distillation
  • PVDF-HFP

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this