Surface characterization by FTIR-ATR spectroscopy of polyethersulfone membranes-unmodified, modified and protein fouled

S. Belfer, R. Fainchtain, Y. Purinson, O. Kedem

Research output: Contribution to journalArticlepeer-review

332 Scopus citations

Abstract

Polyethersulfone (PES) ultrafiltration membranes were modified by radical grafting with the aid of redox initiators to create new functional groups on the surface. Methacrylate-based monomers were used. The modified membrane surfaces were characterized by FTIR-ATR spectroscopy to detect chemical changes during modification. In addition to the common adsorption bands of carbonyl groups typical for all grafted polymers, the FTIR spectrum displayed new absorption bands in the region of aliphatic stretching vibration of the modified PES membrane (2921-2875cm-1), a region lacking absorption bands in the spectrum of the original membrane. It was also shown that the ATR technique enables recognition of the adsorption of albumin on the surface of the membranes. Preliminary results indicate, that spectral techniques such as subtracting and deconvolution could be applied in order to recognize the conformation of the adsorbed albumin. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)113-124
Number of pages12
JournalJournal of Membrane Science
Volume172
Issue number1-2
DOIs
StatePublished - 1 Jul 2000

Keywords

  • Albumin adsorption
  • FTIR-ATR spectroscopy
  • Grafting of methacrylates
  • Redox initiation of grafting
  • Surface modification of UF membranes

ASJC Scopus subject areas

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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