Facile control of surfactant lamellar phase transition and adsorption behavior
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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/10316/106689 https://doi.org/10.1039/D0RA01340D |
Resumo: | This study sets out to investigate the effect of the presence of small water-soluble additives on the tunability of the surfactant gel-to-liquid crystalline (Lb–La) phase transition temperature (Tm) for a bilayer-forming cationic surfactant and the phase behavior of such surfactant systems on dilution. This is strongly driven by the fact that this type of cationic surfactant has many interesting unanswered scientific questions and has found applications in various areas such as consumer care, the petrochemical industry, food science, etc. The underlying surfactant/additive interactions and the interfacial behavior of lamellar surfactant systems including the surfactant deposition on surfaces can provide new avenues to develop novel product formulations. We have examined dioctadecyldimethyl ammonium chloride (DODAC) in the presence of small polar additives, with respect to the phase behavior upon dilution and the deposition on silica. Differential scanning calorimetry (DSC) is used to track the transition temperature, Tm, and synchrotron and laboratory-based small and wide-angle X-ray scattering (SAXS and WAXS) were used to determine the self-assembled surfactant structure below and above the Tm. DSC scans showed that upon dilution the additives could be removed from the surfactant bilayer which in turn tuned the Tm. A spontaneous transition from a liquid crystalline (La) phase to a gel (Lb) phase on dilution was demonstrated, which indicated that additives could be taken out from the La phase. By means of in situ null ellipsometry, the deposition of a diluted surfactant Lb phase upon replacement of bulk solution by deionized water was followed. This technique enables time-resolved monitoring of the deposited surfactant layer thickness and adsorbed amount, which allows us to understand the deposition on surfaces. Robust layers at least one bilayer-thick were deposited onto the surface and shown to be irreversibly adsorbed due to poor surfactant solvency in water. The thickest layer of surfactant deposited after dilution was found for mixtures with small amounts of additive since high amounts might lead to a phase-separated system. |
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Facile control of surfactant lamellar phase transition and adsorption behaviorThis study sets out to investigate the effect of the presence of small water-soluble additives on the tunability of the surfactant gel-to-liquid crystalline (Lb–La) phase transition temperature (Tm) for a bilayer-forming cationic surfactant and the phase behavior of such surfactant systems on dilution. This is strongly driven by the fact that this type of cationic surfactant has many interesting unanswered scientific questions and has found applications in various areas such as consumer care, the petrochemical industry, food science, etc. The underlying surfactant/additive interactions and the interfacial behavior of lamellar surfactant systems including the surfactant deposition on surfaces can provide new avenues to develop novel product formulations. We have examined dioctadecyldimethyl ammonium chloride (DODAC) in the presence of small polar additives, with respect to the phase behavior upon dilution and the deposition on silica. Differential scanning calorimetry (DSC) is used to track the transition temperature, Tm, and synchrotron and laboratory-based small and wide-angle X-ray scattering (SAXS and WAXS) were used to determine the self-assembled surfactant structure below and above the Tm. DSC scans showed that upon dilution the additives could be removed from the surfactant bilayer which in turn tuned the Tm. A spontaneous transition from a liquid crystalline (La) phase to a gel (Lb) phase on dilution was demonstrated, which indicated that additives could be taken out from the La phase. By means of in situ null ellipsometry, the deposition of a diluted surfactant Lb phase upon replacement of bulk solution by deionized water was followed. This technique enables time-resolved monitoring of the deposited surfactant layer thickness and adsorbed amount, which allows us to understand the deposition on surfaces. Robust layers at least one bilayer-thick were deposited onto the surface and shown to be irreversibly adsorbed due to poor surfactant solvency in water. The thickest layer of surfactant deposited after dilution was found for mixtures with small amounts of additive since high amounts might lead to a phase-separated system.Royal Society of Chemistry2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/106689http://hdl.handle.net/10316/106689https://doi.org/10.1039/D0RA01340Deng2046-2069Gonçalves, Rui A.Naidjonoka, PolinaNylander, TommyMiguel, Maria G.Lindman, Björn OlofLam, Yeng Minginfo: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:RCAAP2023-04-17T09:42:25Zoai:estudogeral.uc.pt:10316/106689Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:23:06.175159Repositório 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 |
Facile control of surfactant lamellar phase transition and adsorption behavior |
title |
Facile control of surfactant lamellar phase transition and adsorption behavior |
spellingShingle |
Facile control of surfactant lamellar phase transition and adsorption behavior Gonçalves, Rui A. |
title_short |
Facile control of surfactant lamellar phase transition and adsorption behavior |
title_full |
Facile control of surfactant lamellar phase transition and adsorption behavior |
title_fullStr |
Facile control of surfactant lamellar phase transition and adsorption behavior |
title_full_unstemmed |
Facile control of surfactant lamellar phase transition and adsorption behavior |
title_sort |
Facile control of surfactant lamellar phase transition and adsorption behavior |
author |
Gonçalves, Rui A. |
author_facet |
Gonçalves, Rui A. Naidjonoka, Polina Nylander, Tommy Miguel, Maria G. Lindman, Björn Olof Lam, Yeng Ming |
author_role |
author |
author2 |
Naidjonoka, Polina Nylander, Tommy Miguel, Maria G. Lindman, Björn Olof Lam, Yeng Ming |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Gonçalves, Rui A. Naidjonoka, Polina Nylander, Tommy Miguel, Maria G. Lindman, Björn Olof Lam, Yeng Ming |
description |
This study sets out to investigate the effect of the presence of small water-soluble additives on the tunability of the surfactant gel-to-liquid crystalline (Lb–La) phase transition temperature (Tm) for a bilayer-forming cationic surfactant and the phase behavior of such surfactant systems on dilution. This is strongly driven by the fact that this type of cationic surfactant has many interesting unanswered scientific questions and has found applications in various areas such as consumer care, the petrochemical industry, food science, etc. The underlying surfactant/additive interactions and the interfacial behavior of lamellar surfactant systems including the surfactant deposition on surfaces can provide new avenues to develop novel product formulations. We have examined dioctadecyldimethyl ammonium chloride (DODAC) in the presence of small polar additives, with respect to the phase behavior upon dilution and the deposition on silica. Differential scanning calorimetry (DSC) is used to track the transition temperature, Tm, and synchrotron and laboratory-based small and wide-angle X-ray scattering (SAXS and WAXS) were used to determine the self-assembled surfactant structure below and above the Tm. DSC scans showed that upon dilution the additives could be removed from the surfactant bilayer which in turn tuned the Tm. A spontaneous transition from a liquid crystalline (La) phase to a gel (Lb) phase on dilution was demonstrated, which indicated that additives could be taken out from the La phase. By means of in situ null ellipsometry, the deposition of a diluted surfactant Lb phase upon replacement of bulk solution by deionized water was followed. This technique enables time-resolved monitoring of the deposited surfactant layer thickness and adsorbed amount, which allows us to understand the deposition on surfaces. Robust layers at least one bilayer-thick were deposited onto the surface and shown to be irreversibly adsorbed due to poor surfactant solvency in water. The thickest layer of surfactant deposited after dilution was found for mixtures with small amounts of additive since high amounts might lead to a phase-separated system. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 |
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/10316/106689 http://hdl.handle.net/10316/106689 https://doi.org/10.1039/D0RA01340D |
url |
http://hdl.handle.net/10316/106689 https://doi.org/10.1039/D0RA01340D |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2046-2069 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Royal Society of Chemistry |
publisher.none.fl_str_mv |
Royal Society of Chemistry |
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 |
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 |
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1817554142989647872 |