Lignin enhances cellulose dissolution in cold alkali
(2021) In Carbohydrate Polymers 274.- Abstract
Aqueous sodium hydroxide solutions are extensively used as solvents for lignin in kraft pulping. These are also appealing systems for cellulose dissolution due to their inexpensiveness, ease to recycle and low toxicity. Cellulose dissolution occurs in a narrow concentration region and at low temperatures. Dissolution is often incomplete but additives, such as zinc oxide or urea, have been found to significantly improve cellulose dissolution. In this work, lignin was explored as a possible beneficial additive for cellulose dissolution. Lignin was found to improve cellulose dissolution in cold alkali, extending the NaOH concentration range to lower values. The regenerated cellulose material from the NaOH-lignin solvents was found to have... (More)
Aqueous sodium hydroxide solutions are extensively used as solvents for lignin in kraft pulping. These are also appealing systems for cellulose dissolution due to their inexpensiveness, ease to recycle and low toxicity. Cellulose dissolution occurs in a narrow concentration region and at low temperatures. Dissolution is often incomplete but additives, such as zinc oxide or urea, have been found to significantly improve cellulose dissolution. In this work, lignin was explored as a possible beneficial additive for cellulose dissolution. Lignin was found to improve cellulose dissolution in cold alkali, extending the NaOH concentration range to lower values. The regenerated cellulose material from the NaOH-lignin solvents was found to have a lower crystallinity and crystallite size than the samples prepared in the neat NaOH and NaOH-urea solvents. Beneficial lignin-cellulose interactions in solution state appear to be preserved under coagulation and regeneration, reducing the tendency of crystallization of cellulose.
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- author
- Costa, Carolina ; Medronho, Bruno ; Eivazi, Alireza ; Svanedal, Ida ; Lindman, Björn LU ; Edlund, Håkan and Norgren, Magnus
- organization
- publishing date
- 2021-11-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Cellulose amphiphilicity, Dissolution, Lignin, NaOH (aq.) solvent
- in
- Carbohydrate Polymers
- volume
- 274
- article number
- 118661
- publisher
- Elsevier
- external identifiers
-
- scopus:85115006504
- pmid:34702480
- ISSN
- 0144-8617
- DOI
- 10.1016/j.carbpol.2021.118661
- language
- English
- LU publication?
- yes
- id
- 97e785d2-cb4e-4477-8176-d4396765ec2f
- date added to LUP
- 2021-09-27 13:33:27
- date last changed
- 2024-04-20 11:55:35
@article{97e785d2-cb4e-4477-8176-d4396765ec2f,
abstract = {{<p>Aqueous sodium hydroxide solutions are extensively used as solvents for lignin in kraft pulping. These are also appealing systems for cellulose dissolution due to their inexpensiveness, ease to recycle and low toxicity. Cellulose dissolution occurs in a narrow concentration region and at low temperatures. Dissolution is often incomplete but additives, such as zinc oxide or urea, have been found to significantly improve cellulose dissolution. In this work, lignin was explored as a possible beneficial additive for cellulose dissolution. Lignin was found to improve cellulose dissolution in cold alkali, extending the NaOH concentration range to lower values. The regenerated cellulose material from the NaOH-lignin solvents was found to have a lower crystallinity and crystallite size than the samples prepared in the neat NaOH and NaOH-urea solvents. Beneficial lignin-cellulose interactions in solution state appear to be preserved under coagulation and regeneration, reducing the tendency of crystallization of cellulose.</p>}},
author = {{Costa, Carolina and Medronho, Bruno and Eivazi, Alireza and Svanedal, Ida and Lindman, Björn and Edlund, Håkan and Norgren, Magnus}},
issn = {{0144-8617}},
keywords = {{Cellulose amphiphilicity; Dissolution; Lignin; NaOH (aq.) solvent}},
language = {{eng}},
month = {{11}},
publisher = {{Elsevier}},
series = {{Carbohydrate Polymers}},
title = {{Lignin enhances cellulose dissolution in cold alkali}},
url = {{http://dx.doi.org/10.1016/j.carbpol.2021.118661}},
doi = {{10.1016/j.carbpol.2021.118661}},
volume = {{274}},
year = {{2021}},
}