Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology

Detalhes bibliográficos
Autor(a) principal: Rasteiro, Maria Graça
Data de Publicação: 2015
Outros Autores: Ferreira, Paulo J., Wandrey, Christine, Hunkeler, David, Garcia, Fernando A., Ahmadloo, Hamideh, Pinheiro, Ineide
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/30713
https://doi.org/10.1016/j.proeng.2015.01.305
Resumo: Aggregation of particles is fundamental for improving the performance of many solid/liquid processes. Aggregation can be induced by different means, one of the most common being based on the addition of polymeric additives, namely polyelectrolytes (PEL). In this work we have studied the flocculation of precipitated calcium carbonate (PCC), used as filler in papermaking, induced by a range of cationic polyacrylamides with different structures, varying in molar mass and degree of branching. The flocculation process was monitored continuously using the LDS technique. Using an experimental design strategy it was possible to produce a model which allows us to relate the aggregates structure, described by the scattering exponent (SE), with the PEL characteristics and concentration (R2 around 79%). The Partial Least Squares (PLS) regression method was selected to perform the regression, given the significant collinearity among the input variables. The results obtained lead us to conclude that the polymer intrinsic viscosity (related with the PEL molar mass and charge density, and supplying information about the volume of the polymer molecule in the solution) and the degree of branching, are the parameters with a stronger influence on the resulting flocs structure. The PLS model developed was successfully validated using an independent data set, which provides confidence on its consistency and prediction accuracy.
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spelling Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design MethodologyFlocculationPolyelectrolytesLDSScattering exponentAggregation of particles is fundamental for improving the performance of many solid/liquid processes. Aggregation can be induced by different means, one of the most common being based on the addition of polymeric additives, namely polyelectrolytes (PEL). In this work we have studied the flocculation of precipitated calcium carbonate (PCC), used as filler in papermaking, induced by a range of cationic polyacrylamides with different structures, varying in molar mass and degree of branching. The flocculation process was monitored continuously using the LDS technique. Using an experimental design strategy it was possible to produce a model which allows us to relate the aggregates structure, described by the scattering exponent (SE), with the PEL characteristics and concentration (R2 around 79%). The Partial Least Squares (PLS) regression method was selected to perform the regression, given the significant collinearity among the input variables. The results obtained lead us to conclude that the polymer intrinsic viscosity (related with the PEL molar mass and charge density, and supplying information about the volume of the polymer molecule in the solution) and the degree of branching, are the parameters with a stronger influence on the resulting flocs structure. The PLS model developed was successfully validated using an independent data set, which provides confidence on its consistency and prediction accuracy.Elsevier2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRASTEIRO, Maria G.; PINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A.; WANDREY, Christine; AHMADLOO, Hamideh; HUNKELER, David - Correlating aggregates structure with PEL characteristics using an experimental design methodology. "Procedia Engineering". 102 (2015), 1697–1706. Disponível na WWW em: <http://hdl.handle.net/10316/30713>.http://hdl.handle.net/10316/30713RASTEIRO, Maria G.; PINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A.; WANDREY, Christine; AHMADLOO, Hamideh; HUNKELER, David - Correlating aggregates structure with PEL characteristics using an experimental design methodology. "Procedia Engineering". 102 (2015), 1697–1706. Disponível na WWW em: <http://hdl.handle.net/10316/30713>.http://hdl.handle.net/10316/30713https://doi.org/10.1016/j.proeng.2015.01.305eng1877-7058Rasteiro, Maria GraçaFerreira, Paulo J.Wandrey, ChristineHunkeler, DavidGarcia, Fernando A.Ahmadloo, HamidehPinheiro, Ineideinfo: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:RCAAP2021-10-19T09:51:12Zoai:estudogeral.uc.pt:10316/30713Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:14.392196Repositório 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 Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
title Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
spellingShingle Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
Rasteiro, Maria Graça
Flocculation
Polyelectrolytes
LDS
Scattering exponent
title_short Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
title_full Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
title_fullStr Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
title_full_unstemmed Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
title_sort Correlating Aggregates Structure with PEL Characteristics Using an Experimental Design Methodology
author Rasteiro, Maria Graça
author_facet Rasteiro, Maria Graça
Ferreira, Paulo J.
Wandrey, Christine
Hunkeler, David
Garcia, Fernando A.
Ahmadloo, Hamideh
Pinheiro, Ineide
author_role author
author2 Ferreira, Paulo J.
Wandrey, Christine
Hunkeler, David
Garcia, Fernando A.
Ahmadloo, Hamideh
Pinheiro, Ineide
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Rasteiro, Maria Graça
Ferreira, Paulo J.
Wandrey, Christine
Hunkeler, David
Garcia, Fernando A.
Ahmadloo, Hamideh
Pinheiro, Ineide
dc.subject.por.fl_str_mv Flocculation
Polyelectrolytes
LDS
Scattering exponent
topic Flocculation
Polyelectrolytes
LDS
Scattering exponent
description Aggregation of particles is fundamental for improving the performance of many solid/liquid processes. Aggregation can be induced by different means, one of the most common being based on the addition of polymeric additives, namely polyelectrolytes (PEL). In this work we have studied the flocculation of precipitated calcium carbonate (PCC), used as filler in papermaking, induced by a range of cationic polyacrylamides with different structures, varying in molar mass and degree of branching. The flocculation process was monitored continuously using the LDS technique. Using an experimental design strategy it was possible to produce a model which allows us to relate the aggregates structure, described by the scattering exponent (SE), with the PEL characteristics and concentration (R2 around 79%). The Partial Least Squares (PLS) regression method was selected to perform the regression, given the significant collinearity among the input variables. The results obtained lead us to conclude that the polymer intrinsic viscosity (related with the PEL molar mass and charge density, and supplying information about the volume of the polymer molecule in the solution) and the degree of branching, are the parameters with a stronger influence on the resulting flocs structure. The PLS model developed was successfully validated using an independent data set, which provides confidence on its consistency and prediction accuracy.
publishDate 2015
dc.date.none.fl_str_mv 2015
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 RASTEIRO, Maria G.; PINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A.; WANDREY, Christine; AHMADLOO, Hamideh; HUNKELER, David - Correlating aggregates structure with PEL characteristics using an experimental design methodology. "Procedia Engineering". 102 (2015), 1697–1706. Disponível na WWW em: <http://hdl.handle.net/10316/30713>.
http://hdl.handle.net/10316/30713
RASTEIRO, Maria G.; PINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A.; WANDREY, Christine; AHMADLOO, Hamideh; HUNKELER, David - Correlating aggregates structure with PEL characteristics using an experimental design methodology. "Procedia Engineering". 102 (2015), 1697–1706. Disponível na WWW em: <http://hdl.handle.net/10316/30713>.
http://hdl.handle.net/10316/30713
https://doi.org/10.1016/j.proeng.2015.01.305
identifier_str_mv RASTEIRO, Maria G.; PINHEIRO, Ineide; FERREIRA, Paulo J.; GARCIA, Fernando A.; WANDREY, Christine; AHMADLOO, Hamideh; HUNKELER, David - Correlating aggregates structure with PEL characteristics using an experimental design methodology. "Procedia Engineering". 102 (2015), 1697–1706. Disponível na WWW em: <http://hdl.handle.net/10316/30713>.
url http://hdl.handle.net/10316/30713
https://doi.org/10.1016/j.proeng.2015.01.305
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1877-7058
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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