The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall
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 delignifica...
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| Format: | Article |
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MDPI AG
2021-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/5/1179 |
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| author | Simon Jonasson Anne Bünder Linn Berglund Magnus Hertzberg Totte Niittylä Kristiina Oksman |
| author_facet | Simon Jonasson Anne Bünder Linn Berglund Magnus Hertzberg Totte Niittylä Kristiina Oksman |
| author_sort | Simon Jonasson |
| collection | DOAJ |
| description | 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·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·g<sup>−1</sup>) 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<sup>2</sup>·g<sup>−1</sup> and 76 m<sup>2</sup>·g<sup>−1</sup>) which implicates porosity as a factor that can influence cellulose nanofibril isolation from wood in a beneficial manner. |
| first_indexed | 2024-03-10T11:49:25Z |
| format | Article |
| id | doaj.art-a2ff0fba81154cac8b680f2feef5c6df |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T11:49:25Z |
| publishDate | 2021-04-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-a2ff0fba81154cac8b680f2feef5c6df2023-11-21T17:52:09ZengMDPI AGNanomaterials2079-49912021-04-01115117910.3390/nano11051179The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell WallSimon Jonasson0Anne Bünder1Linn Berglund2Magnus Hertzberg3Totte Niittylä4Kristiina Oksman5Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, SwedenUmeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE 90187 Umeå, SwedenDivision of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, SwedenSweTree Technologies AB, SE 90403 Umeå, SwedenUmeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE 90187 Umeå, SwedenDivision of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, SwedenWood 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·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·g<sup>−1</sup>) 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<sup>2</sup>·g<sup>−1</sup> and 76 m<sup>2</sup>·g<sup>−1</sup>) which implicates porosity as a factor that can influence cellulose nanofibril isolation from wood in a beneficial manner.https://www.mdpi.com/2079-4991/11/5/1179cellulose nanofibrilswoodligninTEMPO-oxidation |
| spellingShingle | Simon Jonasson Anne Bünder Linn Berglund Magnus Hertzberg Totte Niittylä Kristiina Oksman The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall Nanomaterials cellulose nanofibrils wood lignin TEMPO-oxidation |
| title | The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall |
| title_full | The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall |
| title_fullStr | The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall |
| title_full_unstemmed | The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall |
| title_short | The Effect of High Lignin Content on Oxidative Nanofibrillation of Wood Cell Wall |
| title_sort | effect of high lignin content on oxidative nanofibrillation of wood cell wall |
| topic | cellulose nanofibrils wood lignin TEMPO-oxidation |
| url | https://www.mdpi.com/2079-4991/11/5/1179 |
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