Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability

Detalhes bibliográficos
Autor(a) principal: Costa, Carolina
Data de Publicação: 2021
Outros Autores: Rosa, Pedro, Filipe, Alexandra, Medronho, Bruno, Romano, Anabela, Liberman, Lucy, Talmon, Yeshayahu, Norgren, Magnus
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/14969
Resumo: Cellulose-based oil-in-water (O/W) emulsions were studied by diffusing wave spectroscopy (DWS) regarding the effect of the cellulose concentration and mixing rate on the average droplet size, microrheological features and stability. Furthermore, the microstructure of these emulsions was imaged by cryo-scanning electron microscopy (cryo-SEM). The micrographs showed that cellulose was effectively adsorbed at the oil-water interface, resembling a film-like shell that protected the oil droplets from coalescing. The non-adsorbed cellulose that was observed in the continuous aqueous medium, contributed to the enhancement of the viscosity of the medium, leading to an improvement in the stability of the overall system. Generally, the higher the cellulose concentration and mixing rate, the smaller the emulsion droplets formed, and the higher was their stability. The combination of both techniques, DWS and cryo-SEM, revealed a very appealing and robust methodology for the characterization and design of novel emulsion-based formulations.
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spelling Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stabilityDiffusing wave spectroscopyCryo-scanning electron microscopyCellulose;EmulsionsMicrorheologyCellulose-based oil-in-water (O/W) emulsions were studied by diffusing wave spectroscopy (DWS) regarding the effect of the cellulose concentration and mixing rate on the average droplet size, microrheological features and stability. Furthermore, the microstructure of these emulsions was imaged by cryo-scanning electron microscopy (cryo-SEM). The micrographs showed that cellulose was effectively adsorbed at the oil-water interface, resembling a film-like shell that protected the oil droplets from coalescing. The non-adsorbed cellulose that was observed in the continuous aqueous medium, contributed to the enhancement of the viscosity of the medium, leading to an improvement in the stability of the overall system. Generally, the higher the cellulose concentration and mixing rate, the smaller the emulsion droplets formed, and the higher was their stability. The combination of both techniques, DWS and cryo-SEM, revealed a very appealing and robust methodology for the characterization and design of novel emulsion-based formulations.ElsevierSapientiaCosta, CarolinaRosa, PedroFilipe, AlexandraMedronho, BrunoRomano, AnabelaLiberman, LucyTalmon, YeshayahuNorgren, Magnus2021-01-15T17:45:55Z20212021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/14969eng10.1016/j.carbpol.2020.117092info: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:RCAAP2024-11-29T10:48:36Zoai:sapientia.ualg.pt:10400.1/14969Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-11-29T10:48:36Repositório 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 Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
title Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
spellingShingle Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
Costa, Carolina
Diffusing wave spectroscopy
Cryo-scanning electron microscopy
Cellulose;
Emulsions
Microrheology
title_short Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
title_full Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
title_fullStr Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
title_full_unstemmed Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
title_sort Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
author Costa, Carolina
author_facet Costa, Carolina
Rosa, Pedro
Filipe, Alexandra
Medronho, Bruno
Romano, Anabela
Liberman, Lucy
Talmon, Yeshayahu
Norgren, Magnus
author_role author
author2 Rosa, Pedro
Filipe, Alexandra
Medronho, Bruno
Romano, Anabela
Liberman, Lucy
Talmon, Yeshayahu
Norgren, Magnus
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Sapientia
dc.contributor.author.fl_str_mv Costa, Carolina
Rosa, Pedro
Filipe, Alexandra
Medronho, Bruno
Romano, Anabela
Liberman, Lucy
Talmon, Yeshayahu
Norgren, Magnus
dc.subject.por.fl_str_mv Diffusing wave spectroscopy
Cryo-scanning electron microscopy
Cellulose;
Emulsions
Microrheology
topic Diffusing wave spectroscopy
Cryo-scanning electron microscopy
Cellulose;
Emulsions
Microrheology
description Cellulose-based oil-in-water (O/W) emulsions were studied by diffusing wave spectroscopy (DWS) regarding the effect of the cellulose concentration and mixing rate on the average droplet size, microrheological features and stability. Furthermore, the microstructure of these emulsions was imaged by cryo-scanning electron microscopy (cryo-SEM). The micrographs showed that cellulose was effectively adsorbed at the oil-water interface, resembling a film-like shell that protected the oil droplets from coalescing. The non-adsorbed cellulose that was observed in the continuous aqueous medium, contributed to the enhancement of the viscosity of the medium, leading to an improvement in the stability of the overall system. Generally, the higher the cellulose concentration and mixing rate, the smaller the emulsion droplets formed, and the higher was their stability. The combination of both techniques, DWS and cryo-SEM, revealed a very appealing and robust methodology for the characterization and design of novel emulsion-based formulations.
publishDate 2021
dc.date.none.fl_str_mv 2021-01-15T17:45:55Z
2021
2021-01-01T00:00:00Z
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/10400.1/14969
url http://hdl.handle.net/10400.1/14969
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1016/j.carbpol.2020.117092
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 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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection 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
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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