Cellulose-stabilized oil-in-water emulsions: structural features, microrheology, and stability
Autor(a) principal: | |
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Data de Publicação: | 2021 |
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/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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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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1817549824540540928 |