Preparation and characterization of PVDF/TiO 2 mixed matrix membrane via in situ colloidal precipitation method

Teow Yeit Haan, A. L. Ahmad, J. K. Lim, B. S. Ooi

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

In this study, titanium dioxide (TiO 2) nanoparticles (NPs) were incorporated into polyvinylidene fluoride (PVDF) membrane to produce a mixed matrix membrane via phase inversion and colloidal precipitation method. In order to avoid agglomeration and to maintain the stability of NPs in the coagulation bath, NPs were dispersed in the bath via sonication and peptization. The membrane surface morphology and distribution pattern of NPs on the membrane surface were observed by field emission scanning electron microscopy. It was found that the NP size and distribution of NPs on the membrane surface were affected to a very great extent by the type of solvent used in the dope formulation and concentration of TiO 2 in the coagulation bath. Membrane prepared using N-methyl-2-pyrrolidone (NMP) as solvent has smaller surface particles and narrower particle size distribution compared to N-N-dimethylacetamide (DMAc) and N,N-dimethyl formamide (DMF) due to the hydrophobic/hydrophilic interactions between NPs and polymer solution. However, the pore size of membrane prepared using NMP was relatively big, thus resulted in poorer humic acid (HA) rejection. PVDF/TiO 2 mixed matrix membrane using DMAc as solvent with 0.01g/L of TiO 2 in the coagulation bath exhibited extraordinary permeability (43.21L/m 2h) with superior retention properties (98.28%) of humic acid.

Original languageEnglish
Pages (from-to)61-69
Number of pages9
JournalDesalination
Volume295
DOIs
Publication statusPublished - 1 Jun 2012
Externally publishedYes

Fingerprint

fluoride
membrane
Membranes
matrix
Nanoparticles
Coagulation
coagulation
Humic Substances
humic acid
Dimethylformamide
Sonication
method
in situ
polyvinylidene fluoride
Polymer solutions
nanoparticle
agglomeration
Particle size analysis
Field emission
Titanium dioxide

Keywords

  • Colloidal precipitation method
  • Fouling resistance
  • Mixed matrix membrane
  • Particle size distribution
  • Phase inversion
  • TiO dispersion

ASJC Scopus subject areas

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

Cite this

Preparation and characterization of PVDF/TiO 2 mixed matrix membrane via in situ colloidal precipitation method. / Yeit Haan, Teow; Ahmad, A. L.; Lim, J. K.; Ooi, B. S.

In: Desalination, Vol. 295, 01.06.2012, p. 61-69.

Research output: Contribution to journalArticle

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