Surface investigations of radiation grafted FEP-g-polystyrene sulfonic acid membranes using XPS

M. M. Nasef, H. Saidi, Mohd. Ambar Yarmo

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

X-ray photoelectron spectroscopy (XPS) investigations of FEP-g-polystyrene sulfonic acid membranes prepared by radiation-induced graft copolymerization of styrene onto poly(tetrafliioroethylene-co-hexafluoropropylene), FEP films were conducted to monitor the morphological changes accompanied the membrane two-step preparation procedure and the variation of the degree of grafting. The spectra of XPS were analyzed with the main focus on carbon, fluorine, sulfur, and oxygen as they compose the basic elemental components of the membrane. The original FEP film was found to undergo structural changes in terms of chemical composition under the influence of grafting and sulfonation. The surface of the resulting membranes was found to have a nearly pure sulfonated hydrocarbon structure. The atomic ratio of F/C in the membranes was found to be strongly dependent on the degree of grafting whereas, the binding energies of the elemental components of the membranes were found to be independent of the degree of grafting. The results of this study suggest that surface structural properties play a signification part in the degradation of radiation-grafted membranes.

Original languageEnglish
Pages (from-to)309-317
Number of pages9
JournalJournal of New Materials for Electrochemical Systems
Volume3
Issue number4
Publication statusPublished - 2000

Fingerprint

Polytetrafluoroethylene
Polystyrenes
X ray photoelectron spectroscopy
Membranes
Radiation
Acids
Sulfonation
Styrene
Fluorine
Hydrocarbons
polystyrene sulfonic acid
Binding energy
Sulfur
Grafts
Copolymerization
Structural properties
Carbon
Oxygen
Degradation
Chemical analysis

Keywords

  • Degradation
  • Degree of grafting XPS
  • FEP-g-polystyrene membranes
  • Morphology change
  • Surface structural properties

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Surface investigations of radiation grafted FEP-g-polystyrene sulfonic acid membranes using XPS. / Nasef, M. M.; Saidi, H.; Yarmo, Mohd. Ambar.

In: Journal of New Materials for Electrochemical Systems, Vol. 3, No. 4, 2000, p. 309-317.

Research output: Contribution to journalArticle

@article{c15f5c346c21402e9589a9cdb0285292,
title = "Surface investigations of radiation grafted FEP-g-polystyrene sulfonic acid membranes using XPS",
abstract = "X-ray photoelectron spectroscopy (XPS) investigations of FEP-g-polystyrene sulfonic acid membranes prepared by radiation-induced graft copolymerization of styrene onto poly(tetrafliioroethylene-co-hexafluoropropylene), FEP films were conducted to monitor the morphological changes accompanied the membrane two-step preparation procedure and the variation of the degree of grafting. The spectra of XPS were analyzed with the main focus on carbon, fluorine, sulfur, and oxygen as they compose the basic elemental components of the membrane. The original FEP film was found to undergo structural changes in terms of chemical composition under the influence of grafting and sulfonation. The surface of the resulting membranes was found to have a nearly pure sulfonated hydrocarbon structure. The atomic ratio of F/C in the membranes was found to be strongly dependent on the degree of grafting whereas, the binding energies of the elemental components of the membranes were found to be independent of the degree of grafting. The results of this study suggest that surface structural properties play a signification part in the degradation of radiation-grafted membranes.",
keywords = "Degradation, Degree of grafting XPS, FEP-g-polystyrene membranes, Morphology change, Surface structural properties",
author = "Nasef, {M. M.} and H. Saidi and Yarmo, {Mohd. Ambar}",
year = "2000",
language = "English",
volume = "3",
pages = "309--317",
journal = "Journal of New Materials for Electrochemical Systems",
issn = "1480-2422",
publisher = "Ecole Polytechnique de Montreal",
number = "4",

}

TY - JOUR

T1 - Surface investigations of radiation grafted FEP-g-polystyrene sulfonic acid membranes using XPS

AU - Nasef, M. M.

AU - Saidi, H.

AU - Yarmo, Mohd. Ambar

PY - 2000

Y1 - 2000

N2 - X-ray photoelectron spectroscopy (XPS) investigations of FEP-g-polystyrene sulfonic acid membranes prepared by radiation-induced graft copolymerization of styrene onto poly(tetrafliioroethylene-co-hexafluoropropylene), FEP films were conducted to monitor the morphological changes accompanied the membrane two-step preparation procedure and the variation of the degree of grafting. The spectra of XPS were analyzed with the main focus on carbon, fluorine, sulfur, and oxygen as they compose the basic elemental components of the membrane. The original FEP film was found to undergo structural changes in terms of chemical composition under the influence of grafting and sulfonation. The surface of the resulting membranes was found to have a nearly pure sulfonated hydrocarbon structure. The atomic ratio of F/C in the membranes was found to be strongly dependent on the degree of grafting whereas, the binding energies of the elemental components of the membranes were found to be independent of the degree of grafting. The results of this study suggest that surface structural properties play a signification part in the degradation of radiation-grafted membranes.

AB - X-ray photoelectron spectroscopy (XPS) investigations of FEP-g-polystyrene sulfonic acid membranes prepared by radiation-induced graft copolymerization of styrene onto poly(tetrafliioroethylene-co-hexafluoropropylene), FEP films were conducted to monitor the morphological changes accompanied the membrane two-step preparation procedure and the variation of the degree of grafting. The spectra of XPS were analyzed with the main focus on carbon, fluorine, sulfur, and oxygen as they compose the basic elemental components of the membrane. The original FEP film was found to undergo structural changes in terms of chemical composition under the influence of grafting and sulfonation. The surface of the resulting membranes was found to have a nearly pure sulfonated hydrocarbon structure. The atomic ratio of F/C in the membranes was found to be strongly dependent on the degree of grafting whereas, the binding energies of the elemental components of the membranes were found to be independent of the degree of grafting. The results of this study suggest that surface structural properties play a signification part in the degradation of radiation-grafted membranes.

KW - Degradation

KW - Degree of grafting XPS

KW - FEP-g-polystyrene membranes

KW - Morphology change

KW - Surface structural properties

UR - http://www.scopus.com/inward/record.url?scp=0006280337&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0006280337&partnerID=8YFLogxK

M3 - Article

VL - 3

SP - 309

EP - 317

JO - Journal of New Materials for Electrochemical Systems

JF - Journal of New Materials for Electrochemical Systems

SN - 1480-2422

IS - 4

ER -