Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties

The potential of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-mediated oxidation (TMO) to produce cellulose nanofibrils (CNFs) is hindered using costly and environmentally harmful catalysts, limiting its large-scale implementation. To promote sustainability, the TMO medium should be reused but there...

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Autores: Xu, Hongyu, Sanchez-Salvador, Jose Luis, Blanco Suárez, María Ángeles, Balea Martín, Ana, Negro Álvarez, Carlos Manuel
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/108436
Acceso en línea:https://hdl.handle.net/20.500.14352/108436
Access Level:acceso abierto
Palabra clave:66
Cellulose nanofibers
TEMPO-mediated oxidation
Catalyst reusing
TEMPO
Nanocellulose
Circular economy
Ingeniería química
3303 Ingeniería y Tecnología Químicas
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oai_identifier_str oai:docta.ucm.es:20.500.14352/108436
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spelling Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose propertiesXu, HongyuSanchez-Salvador, Jose LuisBlanco Suárez, María ÁngelesBalea Martín, AnaNegro Álvarez, Carlos Manuel66Cellulose nanofibersTEMPO-mediated oxidationCatalyst reusingTEMPONanocelluloseCircular economyIngeniería química3303 Ingeniería y Tecnología QuímicasThe potential of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-mediated oxidation (TMO) to produce cellulose nanofibrils (CNFs) is hindered using costly and environmentally harmful catalysts, limiting its large-scale implementation. To promote sustainability, the TMO medium should be reused but there is a lack of knowledge on this process. The novelty of this research is the identification of the key parameters that affect the recirculation of the TMO medium, and their impact on the quality of the oxidized pulps and CNF products. Contrary to previous hypothesis, results show that the accumulation of salts is not a key parameter; instead, the pulp consistency during oxidation plays a vital role since concentrations higher than 10 g/L led to better CNF quality. Thus, reusing 75 % of the reaction medium, when high pulp consistency is used, does not alter the CNF properties. By reusing the reaction medium up to six times, the catalyst dose is dramatically reduced by >90 % for TEMPO and 80 % for NaBr, compared to the conventional process (0.1 mmol of TEMPO/g and 1 mmol of NaBr/g without medium reuse). Additionally, the high consistency oxidation enables a reduction of >80 % in the reaction time and effluent, and thus a threefold increase in CNF production.ELSEVIER SCI LTD125 London Wall, London EC2Y 5AS, ENGLANDUniversidad Complutense de Madrid20232023-11-0120232023-11-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/108436reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1084362026-06-02T12:44:21Z
dc.title.none.fl_str_mv Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
title Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
spellingShingle Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
Xu, Hongyu
66
Cellulose nanofibers
TEMPO-mediated oxidation
Catalyst reusing
TEMPO
Nanocellulose
Circular economy
Ingeniería química
3303 Ingeniería y Tecnología Químicas
title_short Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
title_full Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
title_fullStr Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
title_full_unstemmed Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
title_sort Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
dc.creator.none.fl_str_mv Xu, Hongyu
Sanchez-Salvador, Jose Luis
Blanco Suárez, María Ángeles
Balea Martín, Ana
Negro Álvarez, Carlos Manuel
author Xu, Hongyu
author_facet Xu, Hongyu
Sanchez-Salvador, Jose Luis
Blanco Suárez, María Ángeles
Balea Martín, Ana
Negro Álvarez, Carlos Manuel
author_role author
author2 Sanchez-Salvador, Jose Luis
Blanco Suárez, María Ángeles
Balea Martín, Ana
Negro Álvarez, Carlos Manuel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 66
Cellulose nanofibers
TEMPO-mediated oxidation
Catalyst reusing
TEMPO
Nanocellulose
Circular economy
Ingeniería química
3303 Ingeniería y Tecnología Químicas
topic 66
Cellulose nanofibers
TEMPO-mediated oxidation
Catalyst reusing
TEMPO
Nanocellulose
Circular economy
Ingeniería química
3303 Ingeniería y Tecnología Químicas
description The potential of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-mediated oxidation (TMO) to produce cellulose nanofibrils (CNFs) is hindered using costly and environmentally harmful catalysts, limiting its large-scale implementation. To promote sustainability, the TMO medium should be reused but there is a lack of knowledge on this process. The novelty of this research is the identification of the key parameters that affect the recirculation of the TMO medium, and their impact on the quality of the oxidized pulps and CNF products. Contrary to previous hypothesis, results show that the accumulation of salts is not a key parameter; instead, the pulp consistency during oxidation plays a vital role since concentrations higher than 10 g/L led to better CNF quality. Thus, reusing 75 % of the reaction medium, when high pulp consistency is used, does not alter the CNF properties. By reusing the reaction medium up to six times, the catalyst dose is dramatically reduced by >90 % for TEMPO and 80 % for NaBr, compared to the conventional process (0.1 mmol of TEMPO/g and 1 mmol of NaBr/g without medium reuse). Additionally, the high consistency oxidation enables a reduction of >80 % in the reaction time and effluent, and thus a threefold increase in CNF production.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-11-01
2023
2023-11-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/108436
url https://hdl.handle.net/20.500.14352/108436
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ELSEVIER SCI LTD125 London Wall, London EC2Y 5AS, ENGLAND
publisher.none.fl_str_mv ELSEVIER SCI LTD125 London Wall, London EC2Y 5AS, ENGLAND
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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