Development of nanofiltration membrane with high salt selectivity and performance stability using polyelectrolyte multilayers

Law Yong Ng, Abdul Wahab Mohammad, Ching Yin Ng, Choe Peng Leo, Rosiah Rohani

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A selective nanofiltration membrane was engineered layer-by-layer (LBL) from polydiallyldimethylammonium chloride (PDADMAC) and polysodium-4-styrenesulfoate (PSS) polyelectrolytes. Thickness for 5 bilayers of PDADMAC/PSS was 321.00±11nm and showed 73.87±7% rejection of MgSO4, 22.52±2% rejection of NaCl and satisfactory flux of 12.33L.m-2.h-1 at 5bar. Formation of PDADMAC/PSS multilayers using 1.5M of supporting electrolyte produced nanofiltration membrane with the best NaCl/MgSO4 selectivity of 2.97. In addition, the stability of polyelectrolyte multilayers was evaluated through membrane back-flushing. Modified membrane using polyelectrolyte solutions of moderate ionic strength (by adding 1.5M NaCl) displayed the best performance stability in which the MgSO4 retention capability reduced for only 4%.

Original languageEnglish
Pages (from-to)19-26
Number of pages8
JournalDesalination
Volume351
DOIs
Publication statusPublished - 15 Oct 2014

Fingerprint

Nanofiltration membranes
Polyelectrolytes
Chlorides
Multilayers
Salts
membrane
salt
chloride
Membranes
Ionic strength
Electrolytes
flushing
electrolyte
Fluxes

Keywords

  • Back-flushing
  • Ionic strength
  • Membrane stability
  • Nanofiltration
  • Polyelectrolyte

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

Development of nanofiltration membrane with high salt selectivity and performance stability using polyelectrolyte multilayers. / Ng, Law Yong; Mohammad, Abdul Wahab; Ng, Ching Yin; Leo, Choe Peng; Rohani, Rosiah.

In: Desalination, Vol. 351, 15.10.2014, p. 19-26.

Research output: Contribution to journalArticle

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