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The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall

Jonasson, Simon and Bünder, Anne and Berglund, Linn and Hertzberg, Magnus and Niittylä, Totte and Oksman, Kristiina (2021). The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall. Nanomaterials. 11 , 1179
[Research article]

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Abstract

Wood from field-grown poplars with different genotypes and varying lignin content (17.4 wt % to 30.0 wt %) were subjected to one-pot 2,2,6,6-Tetramethylpiperidin-1-yl)oxyl catalyzed oxidation and high-pressure homogenization in order to investigate nanofibrillation following simultaneous delignification and cellulose oxidation. When comparing low and high lignin wood it was found that the high lignin wood was more easily fibrillated as indicated by a higher nanofibril yield (68% and 45%) and suspension viscosity (27 and 15 mPa center dot s). The nanofibrils were monodisperse with diameter ranging between 1.2 and 2.0 nm as measured using atomic force microscopy. Slightly less cellulose oxidation (0.44 and 0.68 mmol center dot g(-1)) together with a reduced process yield (36% and 44%) was also found which showed that the removal of a larger amount of lignin increased the efficiency of the homogenization step despite slightly reduced oxidation of the nanofibril surfaces. The surface area of oxidized high lignin wood was also higher than low lignin wood (114 m(2)center dot g(-1) and 76 m(2)center dot g(-1)) which implicates porosity as a factor that can influence cellulose nanofibril isolation from wood in a beneficial manner.

Authors/Creators:Jonasson, Simon and Bünder, Anne and Berglund, Linn and Hertzberg, Magnus and Niittylä, Totte and Oksman, Kristiina
Title:The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall
Series Name/Journal:Nanomaterials
Year of publishing :2021
Volume:11
Article number:1179
Number of Pages:13
Publisher:MDPI
ISSN:2079-4991
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:cellulose nanofibrils, wood, lignin, TEMPO-oxidation
URN:NBN:urn:nbn:se:slu:epsilon-p-112247
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112247
Additional ID:
Type of IDID
DOI10.3390/nano11051179
Web of Science (WoS)000657017400001
ID Code:24511
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:11 Jun 2021 08:03
Metadata Last Modified:11 Jun 2021 08:11

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