Carbon nanotube immobilized membrane with controlled nanotube incorporation via phase inversion polymerization for membrane distillation based desalination

Smruti Ragunath, Sagar Roy, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

In this paper, we present an optimized method for carbon nanotube immobilization on membrane surface for seawater desalination via direct contact membrane distillation (DCMD). Carbon nanotube immobilized membranes (CNIM) are fabricated via phase inversion technique using a controlled approach for carbon nanotube (CNT) incorporation which provides additional pathways for water vapor diffusion. Surface morphology differed for membranes fabricated with varying PVDF concentrations which altered the CNT distribution and its interaction with water vapor. The water vapor flux by CNIM membrane was as high as 51.4 L/m2 hr, which was 76% higher than the unmodified support membrane at 60 °C. No significant salt leakage was observed with modified membrane. The overall mass-transfer coefficient for phase inversion membrane was nearly 1.8 times higher than unmodified membrane.

Original languageEnglish (US)
Pages (from-to)249-255
Number of pages7
JournalSeparation and Purification Technology
Volume194
DOIs
StatePublished - Apr 3 2018

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation

Keywords

  • Carbon nanotubes
  • Desalination
  • Direct contact membrane distillation
  • Phase inversion
  • Surface modification

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