Preparation and characterization of thin film composite membranes modified with amine-functionalized β-cyclodextrins

Bhekani S. Mbuli, Derrick S. Dlamini, Edward N. Nxumalo, Rui W. Krause, Visvanathan L. Pillay, Yoram Oren, Charles Linder, Bhekie B. Mamba

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

This article describes the preparation and characterization of thin film composite (TFC) membranes for the treatment of water by desalination and removal of organic pollutants. The TFC membranes were prepared using trimesoyl chloride and m-phenyldiamine. Amine-functionalized β-cyclodextrins (CDs) were added to modify membrane flux and rejection. Contact angle measurements demonstrate that the incorporation of the functionalized CDs increased the hydrophilicity of the membrane. All the modified membranes showed improved fluxes with a maximum of 20 L m-2 h-1 compared to 5.59 L m-2 h -1 for the unmodified membranes at a pressure of 100 psi. Further, improved fluxes and salt rejections were achieved (maximum NaCl and Na 2SO4 salt rejections were 86% and 94.7%, respectively). Thus, the incorporation of functionalized CDs into TFC membranes improves both the hydrophilicity for minimizing fouling and the rejection of salts without loss of flux.

Original languageEnglish
Pages (from-to)549-558
Number of pages10
JournalJournal of Applied Polymer Science
Volume129
Issue number2
DOIs
StatePublished - 15 Jul 2013

Keywords

  • composites
  • hydrophilic polymers
  • membranes
  • morphology
  • polyamides

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