Cyclodextrin-dendrimer functionalized polysulfone membrane for the removal of humic acid in water

Soraya P. Malinga, Omotayo A. Arotiba, Rui W.M. Krause, Selwyn F. Mapolie, Mamadou S. Diallo, Bhekie B. Mamba

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Commercial polysulfone (PSf) membranes were crosslinked with a β-cyclodextrin-poly (propyleneimine) (β-CD-PPI) conjugate which had β-CD pendant arms using trimesoyl chloride (TMC) by interfacial polymerization. The morphology and physicochemical properties of the nanofiltration membranes were characterized using Fourier transform infrared/attenuated total reflectance (FT-IR/ATR) spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and cross-flow filtration system. Water-contact angle, water-intake capacity, and rejection capacities of the membranes were evaluated. The β-CD-G4 (generation 4)-PPI-PSf and β-CD-G3 (generation 3)-PPI-PSf membranes both exhibited high humic acid rejection of 72% as compared to the commercial PSf which exhibited 57%. The modified membranes were also more hydrophilic (36°to 41°) than PSf (76°). These results suggest that β-CD-PPI nanostructures are promising materials for the synthesis of membranes for the removal of humic acid from water.

Original languageEnglish
Pages (from-to)4428-4439
Number of pages12
JournalJournal of Applied Polymer Science
Volume130
Issue number6
DOIs
Publication statusPublished - 15 Dec 2013

Keywords

  • dendrimers
  • hyperbranched polymers and macrocycles
  • membranes
  • nanostructured polymers

ASJC Scopus subject areas

  • General Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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