Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps

Anna Stiina Jääskeläinen; Katri Toikka; Anni Lähdetie; Tiina Liitiä; Tapani Vuorinen

doi:10.1515/HF.2009.047

Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps

Anna Stiina Jääskeläinen, Katri Toikka, Anni Lähdetie, Tiina Liitiä, Tapani Vuorinen

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

20 Citations (Scopus)

Abstract

The role of aromatic structures in brightness reversion of fully bleached pulps was studied by UV resonance Raman (UVRR) and reflectance UV-Vis spectroscopy. The results clearly showed that ageing increased the aromatic band at approximately 1600 cm^-1 in the UVRR spectra and the lignin band at approximately 280 nm in the UV-Vis spectra. This increase was probably due to increased conjugation of lignin and it was observed for all pulps regardless of the bleaching sequence. In addition to these lignin reactions, other unsaturated structures, such as hexenuronic acid groups, reacted during ageing.

Original language	English
Pages (from-to)	278-281
Number of pages	4
Journal	Holzforschung
Volume	63
Issue number	3
DOIs	https://doi.org/10.1515/HF.2009.047
Publication status	Published - 1 May 2009
MoE publication type	Not Eligible

Keywords

Brightness reversion
Eucalyptus
Kraft pulp
Lignin
Reflectance UV-Vis spectroscopy
UV resonance Raman (UVRR) spectroscopy

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10.1515/HF.2009.047

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abstract = "The role of aromatic structures in brightness reversion of fully bleached pulps was studied by UV resonance Raman (UVRR) and reflectance UV-Vis spectroscopy. The results clearly showed that ageing increased the aromatic band at approximately 1600 cm-1 in the UVRR spectra and the lignin band at approximately 280 nm in the UV-Vis spectra. This increase was probably due to increased conjugation of lignin and it was observed for all pulps regardless of the bleaching sequence. In addition to these lignin reactions, other unsaturated structures, such as hexenuronic acid groups, reacted during ageing.",

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AU - Lähdetie, Anni

AU - Liitiä, Tiina

AU - Vuorinen, Tapani

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KW - Eucalyptus

KW - Kraft pulp

KW - Lignin

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Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps

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Keywords

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