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

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

Research output: Contribution to journalArticleScientificpeer-review

17 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 languageEnglish
Pages (from-to)278-281
Number of pages4
JournalHolzforschung
Volume63
Issue number3
DOIs
Publication statusPublished - 1 May 2009
MoE publication typeNot Eligible

Fingerprint

Bleached pulp
Kraft pulp
Lignin
Luminance
Aging of materials
Bleaching
Ultraviolet spectroscopy
Pulp
Raman scattering
Acids

Keywords

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

Cite this

Jääskeläinen, Anna Stiina ; Toikka, Katri ; Lähdetie, Anni ; Liitiä, Tiina ; Vuorinen, Tapani. / Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps. In: Holzforschung. 2009 ; Vol. 63, No. 3. pp. 278-281.
@article{aa76c5673f03486b9a7dfaca699d255a,
title = "Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps",
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.",
keywords = "Brightness reversion, Eucalyptus, Kraft pulp, Lignin, Reflectance UV-Vis spectroscopy, UV resonance Raman (UVRR) spectroscopy",
author = "J{\"a}{\"a}skel{\"a}inen, {Anna Stiina} and Katri Toikka and Anni L{\"a}hdetie and Tiina Liiti{\"a} and Tapani Vuorinen",
year = "2009",
month = "5",
day = "1",
doi = "10.1515/HF.2009.047",
language = "English",
volume = "63",
pages = "278--281",
journal = "Holzforschung",
issn = "0018-3830",
publisher = "De Gruyter",
number = "3",

}

Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps. / Jääskeläinen, Anna Stiina; Toikka, Katri; Lähdetie, Anni; Liitiä, Tiina; Vuorinen, Tapani.

In: Holzforschung, Vol. 63, No. 3, 01.05.2009, p. 278-281.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Reactions of aromatic structures in brightness reversion of fully-bleached eucalyptus kraft pulps

AU - Jääskeläinen, Anna Stiina

AU - Toikka, Katri

AU - Lähdetie, Anni

AU - Liitiä, Tiina

AU - Vuorinen, Tapani

PY - 2009/5/1

Y1 - 2009/5/1

N2 - 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.

AB - 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.

KW - Brightness reversion

KW - Eucalyptus

KW - Kraft pulp

KW - Lignin

KW - Reflectance UV-Vis spectroscopy

KW - UV resonance Raman (UVRR) spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=63849300652&partnerID=8YFLogxK

U2 - 10.1515/HF.2009.047

DO - 10.1515/HF.2009.047

M3 - Article

VL - 63

SP - 278

EP - 281

JO - Holzforschung

JF - Holzforschung

SN - 0018-3830

IS - 3

ER -