Selective hydrophilization of the permeate surface to enhance flux in membrane distillation

Smruti Ragunath, Sagar Roy, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


This paper reports the development of novel hydrophilized membrane for water desalination using direct contact membrane distillation (DCMD). The permeate side of a porous polytetrafluoroethylene (PTFE) membrane on polypropylene (PP) support was hydrophilized by chemical treatment with oxidizing agents to enhance the rapid condensation and removal of permeated vapors. Depending upon the process conditions, permeate flux was as high as 61 L/m2 h, and as much 73% higher than an unmodified membrane. 58% increase in overall mass transfer coefficient was also observed with the hydrophilized membrane. In short, hydrophilization of membrane surface showed enhanced flux at lower temperature, making this a more energy efficient process.

Original languageEnglish (US)
Pages (from-to)427-433
Number of pages7
JournalSeparation and Purification Technology
StatePublished - Oct 1 2016

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation


  • Desalination
  • Direct contact membrane distillation
  • Mass transfer coefficient
  • Surface hydrophilization


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