Lignin enhances cellulose dissolution in cold alkali

Detalhes bibliográficos
Autor(a) principal: Costa, Carolina
Data de Publicação: 2021
Outros Autores: Medronho, Bruno, Eivazi, Alireza, Svanedal, Ida, Lindman, Björn, Edlund, Håkan, Norgren, Magnus
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/17239
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.
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spelling Lignin enhances cellulose dissolution in cold alkaliLignina aumenta a dissolução de celulose em álcali friaCellulose amphiphilicityDissolutionNaOH (aq.) solventLigninAqueous 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.ElsevierSapientiaCosta, CarolinaMedronho, BrunoEivazi, AlirezaSvanedal, IdaLindman, BjörnEdlund, HåkanNorgren, Magnus2021-10-21T12:55:11Z2021-112021-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/17239eng10.1016/j.carbpol.2021.118661info: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:RCAAP2024-11-29T10:43:48Zoai:sapientia.ualg.pt:10400.1/17239Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-11-29T10:43:48Repositório 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
Lignina aumenta a dissolução de celulose em álcali fria
title Lignin enhances cellulose dissolution in cold alkali
spellingShingle Lignin enhances cellulose dissolution in cold alkali
Costa, Carolina
Cellulose amphiphilicity
Dissolution
NaOH (aq.) solvent
Lignin
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.none.fl_str_mv Sapientia
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
NaOH (aq.) solvent
Lignin
topic Cellulose amphiphilicity
Dissolution
NaOH (aq.) solvent
Lignin
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 2021-10-21T12:55:11Z
2021-11
2021-11-01T00:00:00Z
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/10400.1/17239
url http://hdl.handle.net/10400.1/17239
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1016/j.carbpol.2021.118661
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 mluisa.alvim@gmail.com
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