ESCA (XPS) study on light-induced yellowing of thermomechanical and chemothermomechanical pulps

András Tóth, Oskar Faix, Georg Rachor, Imre Bertóti, Tamás Székely

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Thermomechanical and chemothermomechanical pulp samples have been derived from Norway spruce (Picea abies) and characterized by brightness measurements and ESCA before and after exposure to artificial light irradiation. The surface O/C atomic ratios of the non-irradiated pulps were found to be between 0.3 and 0.37, which was interpreted as being due to their high surface lignin contents. The brightness reversion was accompanied by a considerable increase in the surface O/C ratio, by a decrease in the relative intensity of the C1 component of the C1s peak (BE = 285.0 eV), and by increases in those of the C2 (BE = 286.6 eV) and C3 (BE = 288.2 eV) parts. It had no effect on the shapes of the O 1s peaks. The results were related to the photo-oxidation and photoyellowing of high-yield pulps.

Original languageEnglish
Pages (from-to)209-213
Number of pages5
JournalApplied Surface Science
Volume72
Issue number3
DOIs
Publication statusPublished - Nov 1 1993

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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