Lignin enhances cellulose dissolution in cold alkali
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/96446 https://doi.org/10.1016/j.carbpol.2021.118661 |
Resumo: | 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. |
id |
RCAP_349ff9733bfcaff93464aac3962f65b7 |
---|---|
oai_identifier_str |
oai:estudogeral.uc.pt:10316/96446 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Lignin enhances cellulose dissolution in cold alkaliCellulose amphiphilicityDissolutionLigninNaOH (aq.) solventAqueous 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.2021-11-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/96446http://hdl.handle.net/10316/96446https://doi.org/10.1016/j.carbpol.2021.118661eng01448617https://www.sciencedirect.com/science/article/pii/S0144861721010481Costa, CarolinaMedronho, BrunoEivazi, AlirezaSvanedal, IdaLindman, BjörnEdlund, HåkanNorgren, Magnusinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-05-25T03:54:04Zoai:estudogeral.uc.pt:10316/96446Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:14:42.165477Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Lignin enhances cellulose dissolution in cold alkali |
title |
Lignin enhances cellulose dissolution in cold alkali |
spellingShingle |
Lignin enhances cellulose dissolution in cold alkali Costa, Carolina Cellulose amphiphilicity Dissolution Lignin NaOH (aq.) solvent |
title_short |
Lignin enhances cellulose dissolution in cold alkali |
title_full |
Lignin enhances cellulose dissolution in cold alkali |
title_fullStr |
Lignin enhances cellulose dissolution in cold alkali |
title_full_unstemmed |
Lignin enhances cellulose dissolution in cold alkali |
title_sort |
Lignin enhances cellulose dissolution in cold alkali |
author |
Costa, Carolina |
author_facet |
Costa, Carolina Medronho, Bruno Eivazi, Alireza Svanedal, Ida Lindman, Björn Edlund, Håkan Norgren, Magnus |
author_role |
author |
author2 |
Medronho, Bruno Eivazi, Alireza Svanedal, Ida Lindman, Björn Edlund, Håkan Norgren, Magnus |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Costa, Carolina Medronho, Bruno Eivazi, Alireza Svanedal, Ida Lindman, Björn Edlund, Håkan Norgren, Magnus |
dc.subject.por.fl_str_mv |
Cellulose amphiphilicity Dissolution Lignin NaOH (aq.) solvent |
topic |
Cellulose amphiphilicity Dissolution Lignin NaOH (aq.) solvent |
description |
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. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/96446 http://hdl.handle.net/10316/96446 https://doi.org/10.1016/j.carbpol.2021.118661 |
url |
http://hdl.handle.net/10316/96446 https://doi.org/10.1016/j.carbpol.2021.118661 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
01448617 https://www.sciencedirect.com/science/article/pii/S0144861721010481 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799134045070688256 |