Novel polyamide bilayer membranes with improved desalination performance

Young Hye Na, Jacquana Diep, Radwan Al-Rasheed, Blake Davis, Geoff Geise, Ankit Vora, Majed Nassar, Melanie McNeil, Benny Freeman, Geraud Dubois

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


A polyamide bi-layer membrane consisting of conventional non-substituted aromatic polyamide under-layer (REFPA) and HFA-substituted aromatic polyamide top-layer (HFAPA) was prepared by sequential interfacial polymerization of MPD (1 st aqueous sol), TMP (organic sol), and HFA-MDA (2 nd aqeuous sol). The polyamide bilayer membrane showed significant improvement in salt rejection (ca. 50 % reduction in salt passage) with very minor loss in water flux (ca. 8 % reduction) compared to underlying REFPA, resulting in excellent combination of salt rejection and water flux. Efficient removal of toxic substances such as arsenic and boron was also demonstrated.

Original languageEnglish
Title of host publicationTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
Number of pages4
Publication statusPublished - 2012
Externally publishedYes
EventNanotechnology Conference and Trade Show (Nanotech) 2012 - Santa Clara, United States of America
Duration: 18 Jun 201221 Jun 2012


ConferenceNanotechnology Conference and Trade Show (Nanotech) 2012
Abbreviated titleNanotech 2012
Country/TerritoryUnited States of America
CitySanta Clara
OtherNanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012


  • Desalination
  • Polyamide bilayer
  • Reverse osmosis
  • Sequential interfacial polymerization

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