The influence of pulping and washing conditions on the properties of Eucalyptus
Autor(a) principal: | |
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Data de Publicação: | 2010 |
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/10316/15583 https://doi.org/10.1016/j.biortech.2009.10.004 |
Resumo: | The influence of different addition points of a chelating agent and a counter-ion exchange on the properties of Eucalyptus grandis unbleached kraft pulps is studied. Seven pulps were considered: two laboratory kraft pulps with or without the inclusion of the chelant DTPMPA (diethylene triamine penta (methylene phosphonic acid)), a mill kraft pulp and four mill pulps after Ca+2 or Na+ counter-ion exchange followed, or not, by washing with DTPMPA addition. The laboratory pulps required lower beating energy than the industrial pulps for achieving 30 SR, and the corresponding handsheets also showed better strength and optical properties, as well as a more homogeneous and smooth surface. The counterion exchange decreases the mechanical resistances and increases brightness. However, the effects of Ca+2 are deeper than those of Na+. DTPMPA added to pulping causes a decrease in calcium content whereas as a washing additive does not have a relevant impact on the mechanical and optical properties. |
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The influence of pulping and washing conditions on the properties of EucalyptusEucalyptus grandisKraft pulpingChelating agentsCounter-ion exchangePapermaking propertiesThe influence of different addition points of a chelating agent and a counter-ion exchange on the properties of Eucalyptus grandis unbleached kraft pulps is studied. Seven pulps were considered: two laboratory kraft pulps with or without the inclusion of the chelant DTPMPA (diethylene triamine penta (methylene phosphonic acid)), a mill kraft pulp and four mill pulps after Ca+2 or Na+ counter-ion exchange followed, or not, by washing with DTPMPA addition. The laboratory pulps required lower beating energy than the industrial pulps for achieving 30 SR, and the corresponding handsheets also showed better strength and optical properties, as well as a more homogeneous and smooth surface. The counterion exchange decreases the mechanical resistances and increases brightness. However, the effects of Ca+2 are deeper than those of Na+. DTPMPA added to pulping causes a decrease in calcium content whereas as a washing additive does not have a relevant impact on the mechanical and optical properties.Elsevier2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/15583http://hdl.handle.net/10316/15583https://doi.org/10.1016/j.biortech.2009.10.004eng0960-8524metadata only accessinfo:eu-repo/semantics/openAccessArea, M.C.Carvalho, M.G.V.S.Ferreira, Paulo J.Felissia, F.E.Barboza, O.M.Bengoechea, D.I.reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:48:50Zoai:estudogeral.uc.pt:10316/15583Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:12.731049Repositório 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 |
The influence of pulping and washing conditions on the properties of Eucalyptus |
title |
The influence of pulping and washing conditions on the properties of Eucalyptus |
spellingShingle |
The influence of pulping and washing conditions on the properties of Eucalyptus Area, M.C. Eucalyptus grandis Kraft pulping Chelating agents Counter-ion exchange Papermaking properties |
title_short |
The influence of pulping and washing conditions on the properties of Eucalyptus |
title_full |
The influence of pulping and washing conditions on the properties of Eucalyptus |
title_fullStr |
The influence of pulping and washing conditions on the properties of Eucalyptus |
title_full_unstemmed |
The influence of pulping and washing conditions on the properties of Eucalyptus |
title_sort |
The influence of pulping and washing conditions on the properties of Eucalyptus |
author |
Area, M.C. |
author_facet |
Area, M.C. Carvalho, M.G.V.S. Ferreira, Paulo J. Felissia, F.E. Barboza, O.M. Bengoechea, D.I. |
author_role |
author |
author2 |
Carvalho, M.G.V.S. Ferreira, Paulo J. Felissia, F.E. Barboza, O.M. Bengoechea, D.I. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Area, M.C. Carvalho, M.G.V.S. Ferreira, Paulo J. Felissia, F.E. Barboza, O.M. Bengoechea, D.I. |
dc.subject.por.fl_str_mv |
Eucalyptus grandis Kraft pulping Chelating agents Counter-ion exchange Papermaking properties |
topic |
Eucalyptus grandis Kraft pulping Chelating agents Counter-ion exchange Papermaking properties |
description |
The influence of different addition points of a chelating agent and a counter-ion exchange on the properties of Eucalyptus grandis unbleached kraft pulps is studied. Seven pulps were considered: two laboratory kraft pulps with or without the inclusion of the chelant DTPMPA (diethylene triamine penta (methylene phosphonic acid)), a mill kraft pulp and four mill pulps after Ca+2 or Na+ counter-ion exchange followed, or not, by washing with DTPMPA addition. The laboratory pulps required lower beating energy than the industrial pulps for achieving 30 SR, and the corresponding handsheets also showed better strength and optical properties, as well as a more homogeneous and smooth surface. The counterion exchange decreases the mechanical resistances and increases brightness. However, the effects of Ca+2 are deeper than those of Na+. DTPMPA added to pulping causes a decrease in calcium content whereas as a washing additive does not have a relevant impact on the mechanical and optical properties. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 |
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/10316/15583 http://hdl.handle.net/10316/15583 https://doi.org/10.1016/j.biortech.2009.10.004 |
url |
http://hdl.handle.net/10316/15583 https://doi.org/10.1016/j.biortech.2009.10.004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0960-8524 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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 |
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1799133883555381248 |