Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction
Plant fibers are excellent sources of biomacromolecules, but the extraction of these chemicals critically depends on pretreatments on the biomass. In this work, steam explosion followed by acetosolv or ethanosolv pulping were evaluated as pretreatments for cellulose nanocrystal and lignin extraction...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-11-01
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| Series: | Journal of Natural Fibers |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/15440478.2021.2002763 |
| _version_ | 1797680003083665408 |
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| author | Nágila F. Souza Jéssica S. Almeida José A. Pinheiro Paulo H. F. Pereira João P. Saraiva Morais Cléa B. Figueirêdo Henriette M.C. Azeredo Renato C. Leitão Morsyleide de F. Rosa |
| author_facet | Nágila F. Souza Jéssica S. Almeida José A. Pinheiro Paulo H. F. Pereira João P. Saraiva Morais Cléa B. Figueirêdo Henriette M.C. Azeredo Renato C. Leitão Morsyleide de F. Rosa |
| author_sort | Nágila F. Souza |
| collection | DOAJ |
| description | Plant fibers are excellent sources of biomacromolecules, but the extraction of these chemicals critically depends on pretreatments on the biomass. In this work, steam explosion followed by acetosolv or ethanosolv pulping were evaluated as pretreatments for cellulose nanocrystal and lignin extraction from oil palm mesocarp fibers. The steam explosion improves defibrillation of the biomass, deconstructs lignocellulosic material, facilitating the separation between lignin and polysaccharides by organosolv pulping. The effects of acetic acid or sodium hydroxide concentrations and reaction time for acetosolv or ethanosolv pulping were evaluated by a central composite design. Fibers and biomacromolecules were characterized using analytical methods, including SEM, TEM, DRX, zeta potential, and FTIR. The optimized conditions to obtain cellulose nanocrystals from bleached acetosolv fibers (CNCA) were 80% (w/w) acetic acid catalyzed with HCl 0.6% (w/w) for 35 min, while the optimized conditions from ethanosolv fibers (CNCE) were NaOH 4% (w/v) and ethanol 95% (v/v) for 60 min. The lignins obtained from both optimized conditions presented high purity. The acetosolv delignification was more effective to extract the insoluble lignin (yield of 36.7%) than ethanosolv (yield of 23.2%). The CNCA and CNCE presented, respectively, high crystallinity (68% and 56%) and good aspect ratio (26 and 25). |
| first_indexed | 2024-03-11T23:23:20Z |
| format | Article |
| id | doaj.art-07415ea989334b16afc8a04f6a26278f |
| institution | Directory Open Access Journal |
| issn | 1544-0478 1544-046X |
| language | English |
| last_indexed | 2024-03-11T23:23:20Z |
| publishDate | 2022-11-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Natural Fibers |
| spelling | doaj.art-07415ea989334b16afc8a04f6a26278f2023-09-20T13:25:58ZengTaylor & Francis GroupJournal of Natural Fibers1544-04781544-046X2022-11-011915107081072210.1080/15440478.2021.20027632002763Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules ExtractionNágila F. Souza0Jéssica S. Almeida1José A. Pinheiro2Paulo H. F. Pereira3João P. Saraiva Morais4Cléa B. Figueirêdo5Henriette M.C. Azeredo6Renato C. Leitão7Morsyleide de F. Rosa8Universidade Federal do CearáUniversidade Federal do CearáUniversidade Estadual do CearáUNESP - Univ. Estadual PaulistaEmbrapa CottonEmbrapa Tropical AgroindustryEmbrapa Tropical AgroindustryEmbrapa Tropical AgroindustryEmbrapa Tropical AgroindustryPlant fibers are excellent sources of biomacromolecules, but the extraction of these chemicals critically depends on pretreatments on the biomass. In this work, steam explosion followed by acetosolv or ethanosolv pulping were evaluated as pretreatments for cellulose nanocrystal and lignin extraction from oil palm mesocarp fibers. The steam explosion improves defibrillation of the biomass, deconstructs lignocellulosic material, facilitating the separation between lignin and polysaccharides by organosolv pulping. The effects of acetic acid or sodium hydroxide concentrations and reaction time for acetosolv or ethanosolv pulping were evaluated by a central composite design. Fibers and biomacromolecules were characterized using analytical methods, including SEM, TEM, DRX, zeta potential, and FTIR. The optimized conditions to obtain cellulose nanocrystals from bleached acetosolv fibers (CNCA) were 80% (w/w) acetic acid catalyzed with HCl 0.6% (w/w) for 35 min, while the optimized conditions from ethanosolv fibers (CNCE) were NaOH 4% (w/v) and ethanol 95% (v/v) for 60 min. The lignins obtained from both optimized conditions presented high purity. The acetosolv delignification was more effective to extract the insoluble lignin (yield of 36.7%) than ethanosolv (yield of 23.2%). The CNCA and CNCE presented, respectively, high crystallinity (68% and 56%) and good aspect ratio (26 and 25).http://dx.doi.org/10.1080/15440478.2021.2002763ligninnanocelluloseorganosolv pulpingsteam explosionchemical analysisgreen solvents |
| spellingShingle | Nágila F. Souza Jéssica S. Almeida José A. Pinheiro Paulo H. F. Pereira João P. Saraiva Morais Cléa B. Figueirêdo Henriette M.C. Azeredo Renato C. Leitão Morsyleide de F. Rosa Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction Journal of Natural Fibers lignin nanocellulose organosolv pulping steam explosion chemical analysis green solvents |
| title | Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction |
| title_full | Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction |
| title_fullStr | Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction |
| title_full_unstemmed | Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction |
| title_short | Progress in Organosolv and Steam Explosion Pretreatments of Oil Palm Fibers for Biomacromolecules Extraction |
| title_sort | progress in organosolv and steam explosion pretreatments of oil palm fibers for biomacromolecules extraction |
| topic | lignin nanocellulose organosolv pulping steam explosion chemical analysis green solvents |
| url | http://dx.doi.org/10.1080/15440478.2021.2002763 |
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