Chemical Alterations of Pine Wood Lignin during Heat Sterilization
This study investigated alterations in the lignin of pinewood (Pinus sylvestris L.) during heat sterilization. The Klason lignin content was determined, and the dioxane lignin was isolated. Changes in the dioxane lignin were evaluated by size exclusion chromatography (SEC) as well as Fourier transfo...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
North Carolina State University
2016-02-01
|
Series: | BioResources |
Subjects: | |
Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_2_3442_Kacik_Chemical_Alterations_Pine_Wood_Lignin |
id |
doaj-9d57ead95aea47cc9c358a7e3173007c |
---|---|
record_format |
Article |
spelling |
doaj-9d57ead95aea47cc9c358a7e3173007c2020-11-24T22:53:35ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-02-011123442345210.15376/biores.11.2.3442-3452Chemical Alterations of Pine Wood Lignin during Heat SterilizationFrantišek Kacik0Jana Luptáková1Pavel Šmira2Andrea Nasswettrová3Danica Kačiková4Vladimir Vacek5Technical University in Zvolen; SlovakiaTechnical University in Zvolen; SlovakiaThermo Sanace s.r.o, Ostrava; Czech RepublicThermo Sanace s.r.o, Ostrava; Czech RepublicTechnical University in Zvolen; SlovakiaTechnical University in Zvolen; SlovakiaThis study investigated alterations in the lignin of pinewood (Pinus sylvestris L.) during heat sterilization. The Klason lignin content was determined, and the dioxane lignin was isolated. Changes in the dioxane lignin were evaluated by size exclusion chromatography (SEC) as well as Fourier transform infrared (FTIR) spectroscopy. The analyses illustrated an increase in the percentage of extractives and the amount of dioxane lignin yields, while a decrease in the acid-insoluble lignin content was also observed. Changes in the macromolecular characteristics of the dioxane lignin (molecular weight and polydispersity) were not significant (p < 0.05); however, they indicated that simultaneous degradation and condensation reactions had occurred. The FTIR spectra of the dioxane lignins showed an increase at 3420 cm-1 (O-H stretching vibration), indicating the cleavage of ether bonds. The band at 1715 cm-1 (unconjugated C=O stretching) increased after an initial decrease due to the cleavage of the β-alkyl-aryl ether bonds. Also, the band at 1660 cm-1 (conjugated C=O groups) increased, which was caused by the cleavage of the α-alkyl-aryl ether bonds.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_2_3442_Kacik_Chemical_Alterations_Pine_Wood_LigninFTIRSECPineLigninHeat sterilization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
František Kacik Jana Luptáková Pavel Šmira Andrea Nasswettrová Danica Kačiková Vladimir Vacek |
spellingShingle |
František Kacik Jana Luptáková Pavel Šmira Andrea Nasswettrová Danica Kačiková Vladimir Vacek Chemical Alterations of Pine Wood Lignin during Heat Sterilization BioResources FTIR SEC Pine Lignin Heat sterilization |
author_facet |
František Kacik Jana Luptáková Pavel Šmira Andrea Nasswettrová Danica Kačiková Vladimir Vacek |
author_sort |
František Kacik |
title |
Chemical Alterations of Pine Wood Lignin during Heat Sterilization |
title_short |
Chemical Alterations of Pine Wood Lignin during Heat Sterilization |
title_full |
Chemical Alterations of Pine Wood Lignin during Heat Sterilization |
title_fullStr |
Chemical Alterations of Pine Wood Lignin during Heat Sterilization |
title_full_unstemmed |
Chemical Alterations of Pine Wood Lignin during Heat Sterilization |
title_sort |
chemical alterations of pine wood lignin during heat sterilization |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 1930-2126 |
publishDate |
2016-02-01 |
description |
This study investigated alterations in the lignin of pinewood (Pinus sylvestris L.) during heat sterilization. The Klason lignin content was determined, and the dioxane lignin was isolated. Changes in the dioxane lignin were evaluated by size exclusion chromatography (SEC) as well as Fourier transform infrared (FTIR) spectroscopy. The analyses illustrated an increase in the percentage of extractives and the amount of dioxane lignin yields, while a decrease in the acid-insoluble lignin content was also observed. Changes in the macromolecular characteristics of the dioxane lignin (molecular weight and polydispersity) were not significant (p < 0.05); however, they indicated that simultaneous degradation and condensation reactions had occurred. The FTIR spectra of the dioxane lignins showed an increase at 3420 cm-1 (O-H stretching vibration), indicating the cleavage of ether bonds. The band at 1715 cm-1 (unconjugated C=O stretching) increased after an initial decrease due to the cleavage of the β-alkyl-aryl ether bonds. Also, the band at 1660 cm-1 (conjugated C=O groups) increased, which was caused by the cleavage of the α-alkyl-aryl ether bonds. |
topic |
FTIR SEC Pine Lignin Heat sterilization |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_2_3442_Kacik_Chemical_Alterations_Pine_Wood_Lignin |
work_keys_str_mv |
AT frantisekkacik chemicalalterationsofpinewoodligninduringheatsterilization AT janaluptakova chemicalalterationsofpinewoodligninduringheatsterilization AT pavelsmira chemicalalterationsofpinewoodligninduringheatsterilization AT andreanasswettrova chemicalalterationsofpinewoodligninduringheatsterilization AT danicakacikova chemicalalterationsofpinewoodligninduringheatsterilization AT vladimirvacek chemicalalterationsofpinewoodligninduringheatsterilization |
_version_ |
1725662800538238976 |