Polymer evolution of a sulfonated polysulfone membrane as a function of ion beam irradiation fluence

Rama Chennamsetty, Isabel Escobar, Xinglong Xu

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Ion beam irradiation was used to modify the surface of a sulfonated polysulfone water treatment membrane. A beam of 25 keV H+ ions with three irradiation fluences (1 × 1013 ions/cm2, 5 × 1013 ions/cm2, and 1 × 1014 ions/cm2) was used for membrane irradiation. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) analyses were performed on the virgin and irradiated membranes in order to determine the changes to chemical structure incurred by ion beam irradiation. The results show that some of the sulphonic and C{single bond}H bonds were broken and new C{single bond}S bonds were formed after irradiation. Atomic force microscope (AFM) analyses show that membrane roughness decreased after irradiation. A significant increase in flux after ion beam irradiation was also observed, while the amount of cake accumulation on the membrane was decreased after ion beam irradiation. Hydrophobicity, pore size distribution and selectivity of the membrane were not affected by ion beam irradiation.

Original languageEnglish
Pages (from-to)253-260
Number of pages8
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Sep 1 2006

Bibliographical note

Funding Information:
This project was funded by the National Science Foundation grant CTS 03-31778. The authors acknowledge Dr. Peter Simpson (University of Western Ontario) and Dr. Victor H. Rotberg (University of Michigan) where irradiation was performed and Dr. Mark Wilk for providing membrane samples.


  • Ion beam radiation
  • Ion fluence
  • Membrane
  • Surface modifications

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science (all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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