Amphoteric polymers to improve paper dry strength

Detalhes bibliográficos
Autor(a) principal: Silva, Deusanilde de Jesus
Data de Publicação: 2015
Outros Autores: Park, Song Won, Hubbe, Martin Allen, Rojas, Orlando José
Tipo de documento: Artigo
Idioma: por
Título da fonte: Revista de Engenharia Química e Química
Texto Completo: https://periodicos.ufv.br/jcec/article/view/2446941601022015065
Resumo: The objective of the present work is to evaluate the application of an amphoteric polymer, with acidic and basic groups on the polymer chain, as a paper dry strength additive. The polymer studied here is random terpolymer of high electrostatic charge density, and high molecular weight. The results of our work showed that the balance between the charge densities of the surface and the polymer structures is an important factor to be considered when using this polymer. The highest paper strength value, measured by tensile index, was found at the polyampholyte’s isoelectric point (ca. pH of 7.3) when the charge of the fiber surface was negative and the polymer structure charge was symmetric. This observation agrees with our dynamic light scattering results which, demonstrated that at the isoelectric point there was a maximum in association among polyampholyte molecules, leading to a maximum in size of molecular aggregates. When adsorbed on an electrically charged surface, the maximum amount of adsorbed polymer, measured by the shift in resonance frequency in a quartz crystal microgravimetric balance, was observed for the same isoelectric point. Better results for paper dry strength were found when the fiber surface and the polymer structures were oppositely charged or at the isoelectric point of the polymer. Less effective addition strategies were found in the case when the fiber surfaces and the polymer structures had same sign of charge.DOI: 2446941601022015065
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spelling Amphoteric polymers to improve paper dry strengthNanotechnologyPolyampholytesPaper strengthSurface charge densityElectrostatic interactionColloidal chemistryThe objective of the present work is to evaluate the application of an amphoteric polymer, with acidic and basic groups on the polymer chain, as a paper dry strength additive. The polymer studied here is random terpolymer of high electrostatic charge density, and high molecular weight. The results of our work showed that the balance between the charge densities of the surface and the polymer structures is an important factor to be considered when using this polymer. The highest paper strength value, measured by tensile index, was found at the polyampholyte’s isoelectric point (ca. pH of 7.3) when the charge of the fiber surface was negative and the polymer structure charge was symmetric. This observation agrees with our dynamic light scattering results which, demonstrated that at the isoelectric point there was a maximum in association among polyampholyte molecules, leading to a maximum in size of molecular aggregates. When adsorbed on an electrically charged surface, the maximum amount of adsorbed polymer, measured by the shift in resonance frequency in a quartz crystal microgravimetric balance, was observed for the same isoelectric point. Better results for paper dry strength were found when the fiber surface and the polymer structures were oppositely charged or at the isoelectric point of the polymer. Less effective addition strategies were found in the case when the fiber surfaces and the polymer structures had same sign of charge.DOI: 2446941601022015065Universidade Federal de Viçosa - UFV2015-12-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufv.br/jcec/article/view/244694160102201506510.18540/jcecvl1iss2pp65-79The Journal of Engineering and Exact Sciences; Vol. 1 No. 2 (2015); 65-79The Journal of Engineering and Exact Sciences; Vol. 1 Núm. 2 (2015); 65-79The Journal of Engineering and Exact Sciences; v. 1 n. 2 (2015); 65-792527-1075reponame:Revista de Engenharia Química e Químicainstname:Universidade Federal de Viçosa (UFV)instacron:UFVporhttps://periodicos.ufv.br/jcec/article/view/2446941601022015065/pdfSilva, Deusanilde de JesusPark, Song WonHubbe, Martin AllenRojas, Orlando Joséinfo:eu-repo/semantics/openAccess2019-03-11T18:26:45Zoai:ojs.periodicos.ufv.br:article/2154Revistahttp://www.seer.ufv.br/seer/rbeq2/index.php/req2/indexONGhttps://periodicos.ufv.br/jcec/oaijcec.journal@ufv.br||req2@ufv.br2446-94162446-9416opendoar:2019-03-11T18:26:45Revista de Engenharia Química e Química - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Amphoteric polymers to improve paper dry strength
title Amphoteric polymers to improve paper dry strength
spellingShingle Amphoteric polymers to improve paper dry strength
Silva, Deusanilde de Jesus
Nanotechnology
Polyampholytes
Paper strength
Surface charge density
Electrostatic interaction
Colloidal chemistry
title_short Amphoteric polymers to improve paper dry strength
title_full Amphoteric polymers to improve paper dry strength
title_fullStr Amphoteric polymers to improve paper dry strength
title_full_unstemmed Amphoteric polymers to improve paper dry strength
title_sort Amphoteric polymers to improve paper dry strength
author Silva, Deusanilde de Jesus
author_facet Silva, Deusanilde de Jesus
Park, Song Won
Hubbe, Martin Allen
Rojas, Orlando José
author_role author
author2 Park, Song Won
Hubbe, Martin Allen
Rojas, Orlando José
author2_role author
author
author
dc.contributor.author.fl_str_mv Silva, Deusanilde de Jesus
Park, Song Won
Hubbe, Martin Allen
Rojas, Orlando José
dc.subject.por.fl_str_mv Nanotechnology
Polyampholytes
Paper strength
Surface charge density
Electrostatic interaction
Colloidal chemistry
topic Nanotechnology
Polyampholytes
Paper strength
Surface charge density
Electrostatic interaction
Colloidal chemistry
description The objective of the present work is to evaluate the application of an amphoteric polymer, with acidic and basic groups on the polymer chain, as a paper dry strength additive. The polymer studied here is random terpolymer of high electrostatic charge density, and high molecular weight. The results of our work showed that the balance between the charge densities of the surface and the polymer structures is an important factor to be considered when using this polymer. The highest paper strength value, measured by tensile index, was found at the polyampholyte’s isoelectric point (ca. pH of 7.3) when the charge of the fiber surface was negative and the polymer structure charge was symmetric. This observation agrees with our dynamic light scattering results which, demonstrated that at the isoelectric point there was a maximum in association among polyampholyte molecules, leading to a maximum in size of molecular aggregates. When adsorbed on an electrically charged surface, the maximum amount of adsorbed polymer, measured by the shift in resonance frequency in a quartz crystal microgravimetric balance, was observed for the same isoelectric point. Better results for paper dry strength were found when the fiber surface and the polymer structures were oppositely charged or at the isoelectric point of the polymer. Less effective addition strategies were found in the case when the fiber surfaces and the polymer structures had same sign of charge.DOI: 2446941601022015065
publishDate 2015
dc.date.none.fl_str_mv 2015-12-06
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufv.br/jcec/article/view/2446941601022015065
10.18540/jcecvl1iss2pp65-79
url https://periodicos.ufv.br/jcec/article/view/2446941601022015065
identifier_str_mv 10.18540/jcecvl1iss2pp65-79
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufv.br/jcec/article/view/2446941601022015065/pdf
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 Universidade Federal de Viçosa - UFV
publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
dc.source.none.fl_str_mv The Journal of Engineering and Exact Sciences; Vol. 1 No. 2 (2015); 65-79
The Journal of Engineering and Exact Sciences; Vol. 1 Núm. 2 (2015); 65-79
The Journal of Engineering and Exact Sciences; v. 1 n. 2 (2015); 65-79
2527-1075
reponame:Revista de Engenharia Química e Química
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str Revista de Engenharia Química e Química
collection Revista de Engenharia Química e Química
repository.name.fl_str_mv Revista de Engenharia Química e Química - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv jcec.journal@ufv.br||req2@ufv.br
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