Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers

The specific surface area (SSA) of cellulosic or lignocellulosic fibers is seldom reported in the recent literature on papermaking, despite its close relation with the degree of refining and other key pulp properties. Amidst outdated assays (Pulmac permeability test) and methods that, while accurate...

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Autores: Delgado Aguilar, Marc, Serra Parareda, Ferran, Aguado, Roberto J., Tarrés Farrés, Joaquim Agustí, Mutjé Pujol, Pere
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10256/20445
Acceso en línea:http://hdl.handle.net/10256/20445
Access Level:acceso abierto
Palabra clave:Fibres de cel·lulosa
Cellulose fibers
Paper -- Fabricació
Papermaking
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spelling Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibersDelgado Aguilar, MarcSerra Parareda, FerranAguado, Roberto J.Tarrés Farrés, Joaquim AgustíMutjé Pujol, PereDelgado Aguilar, MarcFibres de cel·lulosaCellulose fibersPaper -- FabricacióPapermakingThe specific surface area (SSA) of cellulosic or lignocellulosic fibers is seldom reported in the recent literature on papermaking, despite its close relation with the degree of refining and other key pulp properties. Amidst outdated assays (Pulmac permeability test) and methods that, while accurate, are of doubtful usefulness for papermaking purposes (N2 adsorption–desorption), we suggest a methodology based on the cationic demand. A commonly used cationic polyelectrolyte, poly(diallyldimethylammonium chloride) (PDADMAC), became adsorbed onto thermomechanical pulp samples. Then, a potentiometric back titration with an anionic polyelectrolyte measured the cationic demand, expressed as microequivalents of PDADMAC per gram of pulp. Multiplying this value by the surface area of a microequivalent of polymer, considering rod-like conformation in the case of minimum ionic strength, yielded the SSA of the lignocellulosic pulp. Our system assumes that the quaternary ammonium groups were anchored through electrostatic and ion–dipole interactions. Measuring the carboxyl content allowed for discriminating between both kinds of forces. Finally, the model could be validated by plotting the estimated SSA values against the Schopper-Riegler degree, attaining high correlation coefficients (R2 ~ 0.98). Owing to the high molecular weight of the polyelectrolyte of choice (107 kDa), and more particularly in the case of fine-free pulps, SSA values estimated from the cationic demand were consistently lower than those from dye (Congo red) sorption. Instead of being a drawback, the limited diffusion of PDADMAC through fibers can enable papermakers to attain a more helpful quantification of the available surfaces in operations with low residence timesAuthors wish to acknowledge the financial support of the Spanish Ministry of Economy and Competitiveness to the Project NANOPROSOST, Reference CTQ2017-85654-C2-1-R. Marc Delgado-Aguilar is a Serra Hu´nter FellowOpen Access funding provided thanks to the CRUE-CSIC agreement with Springer NatureSpringerAgencia Estatal de Investigación2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionpeer-reviewedapplication/pdfhttp://hdl.handle.net/10256/20445Cellulose, 2021, vol. 28, p. 10815-10825Articles publicats (D-EQATA)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10570-021-04250-6info:eu-repo/semantics/altIdentifier/issn/0969-0239info:eu-repo/semantics/altIdentifier/eissn/1572-882XCTQ2017-85654-C2-1-Rinfo:recolecta/grantAgreement/Programa Estatal de I+D+i Orientada a los Retos de la Sociedad/Programa Estatal de I+D+i Orientada a los Retos de la Sociedad/2017/CTQ2017-85654-C2-1-R/AEIAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:10256/204452026-05-29T05:05:01Z
dc.title.none.fl_str_mv Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
title Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
spellingShingle Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
Delgado Aguilar, Marc
Fibres de cel·lulosa
Cellulose fibers
Paper -- Fabricació
Papermaking
title_short Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
title_full Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
title_fullStr Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
title_full_unstemmed Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
title_sort Potentiometric back titration as a robust and simple method for specific surface area estimation of lignocellulosic fibers
dc.creator.none.fl_str_mv Delgado Aguilar, Marc
Serra Parareda, Ferran
Aguado, Roberto J.
Tarrés Farrés, Joaquim Agustí
Mutjé Pujol, Pere
Delgado Aguilar, Marc
author Delgado Aguilar, Marc
author_facet Delgado Aguilar, Marc
Serra Parareda, Ferran
Aguado, Roberto J.
Tarrés Farrés, Joaquim Agustí
Mutjé Pujol, Pere
author_role author
author2 Serra Parareda, Ferran
Aguado, Roberto J.
Tarrés Farrés, Joaquim Agustí
Mutjé Pujol, Pere
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación
dc.subject.none.fl_str_mv Fibres de cel·lulosa
Cellulose fibers
Paper -- Fabricació
Papermaking
topic Fibres de cel·lulosa
Cellulose fibers
Paper -- Fabricació
Papermaking
description The specific surface area (SSA) of cellulosic or lignocellulosic fibers is seldom reported in the recent literature on papermaking, despite its close relation with the degree of refining and other key pulp properties. Amidst outdated assays (Pulmac permeability test) and methods that, while accurate, are of doubtful usefulness for papermaking purposes (N2 adsorption–desorption), we suggest a methodology based on the cationic demand. A commonly used cationic polyelectrolyte, poly(diallyldimethylammonium chloride) (PDADMAC), became adsorbed onto thermomechanical pulp samples. Then, a potentiometric back titration with an anionic polyelectrolyte measured the cationic demand, expressed as microequivalents of PDADMAC per gram of pulp. Multiplying this value by the surface area of a microequivalent of polymer, considering rod-like conformation in the case of minimum ionic strength, yielded the SSA of the lignocellulosic pulp. Our system assumes that the quaternary ammonium groups were anchored through electrostatic and ion–dipole interactions. Measuring the carboxyl content allowed for discriminating between both kinds of forces. Finally, the model could be validated by plotting the estimated SSA values against the Schopper-Riegler degree, attaining high correlation coefficients (R2 ~ 0.98). Owing to the high molecular weight of the polyelectrolyte of choice (107 kDa), and more particularly in the case of fine-free pulps, SSA values estimated from the cationic demand were consistently lower than those from dye (Congo red) sorption. Instead of being a drawback, the limited diffusion of PDADMAC through fibers can enable papermakers to attain a more helpful quantification of the available surfaces in operations with low residence times
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
peer-reviewed
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10256/20445
url http://hdl.handle.net/10256/20445
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s10570-021-04250-6
info:eu-repo/semantics/altIdentifier/issn/0969-0239
info:eu-repo/semantics/altIdentifier/eissn/1572-882X
CTQ2017-85654-C2-1-R
info:recolecta/grantAgreement/Programa Estatal de I+D+i Orientada a los Retos de la Sociedad/Programa Estatal de I+D+i Orientada a los Retos de la Sociedad/2017/CTQ2017-85654-C2-1-R/AEI
dc.rights.none.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Cellulose, 2021, vol. 28, p. 10815-10825
Articles publicats (D-EQATA)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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