CHARACTERIZATION OF MACROMOLECULAR TRAITS OF LIGNIN FROM HEAT TREATED SPRUCE WOOD BY SIZE EXCLUSION CHROMATOGRAPHY
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F18%3A78779" target="_blank" >RIV/60460709:41320/18:78779 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.17423/afx.2018.60.2.03" target="_blank" >http://dx.doi.org/10.17423/afx.2018.60.2.03</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17423/afx.2018.60.2.03" target="_blank" >10.17423/afx.2018.60.2.03</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
CHARACTERIZATION OF MACROMOLECULAR TRAITS OF LIGNIN FROM HEAT TREATED SPRUCE WOOD BY SIZE EXCLUSION CHROMATOGRAPHY
Popis výsledku v původním jazyce
Lignin composition, functionality, purity, molecular weight distribution and degree of cross-linking are of great interest because of their impact on physicochemical properties and influence on its potential applications. In this study, dioxane lignin from spruce wood thermally treated at various temperatures (100, 150, 200, 220, 240, 260, 280 and 300 degrees C) and duration (1, 3 and 5 hours) was investigated by size exclusion chromatography (SEC) using 0,005 M LiBr in DMF on two POLAR-M columns. With increasing temperature and duration of treatment the degradation and condensation reactions take place in lignin. At the temperatures till 200,240 degrees C, the degradation and condensation reactions take place simultaneously, but the lignin macromolecule condensation is predominant, and the molecular weights increase. At the temperatures over 240 degrees C, the decomposition of high molecular fractions of lignin takes place. Under mild conditions of thermal treatment, the extraction of lignin from wo
Název v anglickém jazyce
CHARACTERIZATION OF MACROMOLECULAR TRAITS OF LIGNIN FROM HEAT TREATED SPRUCE WOOD BY SIZE EXCLUSION CHROMATOGRAPHY
Popis výsledku anglicky
Lignin composition, functionality, purity, molecular weight distribution and degree of cross-linking are of great interest because of their impact on physicochemical properties and influence on its potential applications. In this study, dioxane lignin from spruce wood thermally treated at various temperatures (100, 150, 200, 220, 240, 260, 280 and 300 degrees C) and duration (1, 3 and 5 hours) was investigated by size exclusion chromatography (SEC) using 0,005 M LiBr in DMF on two POLAR-M columns. With increasing temperature and duration of treatment the degradation and condensation reactions take place in lignin. At the temperatures till 200,240 degrees C, the degradation and condensation reactions take place simultaneously, but the lignin macromolecule condensation is predominant, and the molecular weights increase. At the temperatures over 240 degrees C, the decomposition of high molecular fractions of lignin takes place. Under mild conditions of thermal treatment, the extraction of lignin from wo
Klasifikace
Druh
J<sub>SC</sub> - Článek v periodiku v databázi SCOPUS
CEP obor
—
OECD FORD obor
20502 - Paper and wood
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Acta Facultatis Xylologiae
ISSN
1336-3824
e-ISSN
—
Svazek periodika
60
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
SK - Slovenská republika
Počet stran výsledku
10
Strana od-do
33-42
Kód UT WoS článku
000448690700003
EID výsledku v databázi Scopus
2-s2.0-85055944925