Properties and controlled release of chitosan microencapsulated limonene oil

Detalhes bibliográficos
Autor(a) principal: Souza, Jefferson Mendes de
Data de Publicação: 2014
Outros Autores: Caldas, Artemísia L., Tohidi, Shafagh Dinparast, Molina, J., Souto, A. Pedro, Fangueiro, Raúl, Zille, Andrea
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/34138
Resumo: Chitosan microcapsules containing limonene essential oil as active ingredient were prepared by coacervation using three different concentrations of NaOH (0.50, 1.00, 1.45 wt%) and fixed concentrations of chitosan and surfactant of 0.50 wt%. The produced microcapsules were fully characterized in their morphology and chemical composition, and the kinetic release analysis of the active ingredient was evaluated after deposition in a non-woven cellulose fabric. The concentration of 1.00 and 1.45 wt% clearly show the best results in terms of dimension and shape of the microcapsules as well as in the volatility results. However, at the concentration of 1 wt% a higher number of microcapsules were produced as confirmed by FTIR and EDS analysis. Free microcapsules are spherical in size with disperse diameters between 2 and 12 μm. Immobilized microcapsules showed sizes from 4 to 7 μm, a rough surface and loss of spherical shape with pore formation in the chitosan walls. SEM analysis confirms that at higher NaOH concentrations, the larger the size of the microcapsules. This technique shows that by tuning NaOH concentration it is possible to efficiently control the release rate of encapsulated active agents demonstrating great potential as insect repellent for textiles.
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spelling Properties and controlled release of chitosan microencapsulated limonene oilCelluloseChitosanControlled releaseEssential oilMicrocapsuleLimoneneScience & TechnologyChitosan microcapsules containing limonene essential oil as active ingredient were prepared by coacervation using three different concentrations of NaOH (0.50, 1.00, 1.45 wt%) and fixed concentrations of chitosan and surfactant of 0.50 wt%. The produced microcapsules were fully characterized in their morphology and chemical composition, and the kinetic release analysis of the active ingredient was evaluated after deposition in a non-woven cellulose fabric. The concentration of 1.00 and 1.45 wt% clearly show the best results in terms of dimension and shape of the microcapsules as well as in the volatility results. However, at the concentration of 1 wt% a higher number of microcapsules were produced as confirmed by FTIR and EDS analysis. Free microcapsules are spherical in size with disperse diameters between 2 and 12 μm. Immobilized microcapsules showed sizes from 4 to 7 μm, a rough surface and loss of spherical shape with pore formation in the chitosan walls. SEM analysis confirms that at higher NaOH concentrations, the larger the size of the microcapsules. This technique shows that by tuning NaOH concentration it is possible to efficiently control the release rate of encapsulated active agents demonstrating great potential as insect repellent for textiles.JMS and ALC acknowledge CAPES Foundation, the Ministry of Education of Brazil, Proc. n<SUP>o</SUP> 8976/13-9 e Proc. N<SUP>o</SUP> 1071/13-0, respectively, and the Department of Textile Engineering of the University of Minho, Portugal. J. Molina is grateful to the Conselleria d'Educacio, Formacio i Ocupacio (Generalitat Valenciana) for the Programa VALi+D Postdoctoral Fellowship. AZ (C2011-UMINHO-2C2T-01) acknowledges funding from Programa Compromisso para a Ciencia 2008, Portugal. Shafagh Dinparast Tohidi would like to thank the Portuguese Foundation of Science and Technology for providing the PhD grant SFRH/BD/94759/2013.ElsevierUniversidade do MinhoSouza, Jefferson Mendes deCaldas, Artemísia L.Tohidi, Shafagh DinparastMolina, J.Souto, A. PedroFangueiro, RaúlZille, Andrea20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/34138eng0102-695X10.1016/j.bjp.2014.11.007info: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:RCAAP2023-07-21T12:52:03Zoai:repositorium.sdum.uminho.pt:1822/34138Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:51:06.290116Repositório 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 Properties and controlled release of chitosan microencapsulated limonene oil
title Properties and controlled release of chitosan microencapsulated limonene oil
spellingShingle Properties and controlled release of chitosan microencapsulated limonene oil
Souza, Jefferson Mendes de
Cellulose
Chitosan
Controlled release
Essential oil
Microcapsule
Limonene
Science & Technology
title_short Properties and controlled release of chitosan microencapsulated limonene oil
title_full Properties and controlled release of chitosan microencapsulated limonene oil
title_fullStr Properties and controlled release of chitosan microencapsulated limonene oil
title_full_unstemmed Properties and controlled release of chitosan microencapsulated limonene oil
title_sort Properties and controlled release of chitosan microencapsulated limonene oil
author Souza, Jefferson Mendes de
author_facet Souza, Jefferson Mendes de
Caldas, Artemísia L.
Tohidi, Shafagh Dinparast
Molina, J.
Souto, A. Pedro
Fangueiro, Raúl
Zille, Andrea
author_role author
author2 Caldas, Artemísia L.
Tohidi, Shafagh Dinparast
Molina, J.
Souto, A. Pedro
Fangueiro, Raúl
Zille, Andrea
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Souza, Jefferson Mendes de
Caldas, Artemísia L.
Tohidi, Shafagh Dinparast
Molina, J.
Souto, A. Pedro
Fangueiro, Raúl
Zille, Andrea
dc.subject.por.fl_str_mv Cellulose
Chitosan
Controlled release
Essential oil
Microcapsule
Limonene
Science & Technology
topic Cellulose
Chitosan
Controlled release
Essential oil
Microcapsule
Limonene
Science & Technology
description Chitosan microcapsules containing limonene essential oil as active ingredient were prepared by coacervation using three different concentrations of NaOH (0.50, 1.00, 1.45 wt%) and fixed concentrations of chitosan and surfactant of 0.50 wt%. The produced microcapsules were fully characterized in their morphology and chemical composition, and the kinetic release analysis of the active ingredient was evaluated after deposition in a non-woven cellulose fabric. The concentration of 1.00 and 1.45 wt% clearly show the best results in terms of dimension and shape of the microcapsules as well as in the volatility results. However, at the concentration of 1 wt% a higher number of microcapsules were produced as confirmed by FTIR and EDS analysis. Free microcapsules are spherical in size with disperse diameters between 2 and 12 μm. Immobilized microcapsules showed sizes from 4 to 7 μm, a rough surface and loss of spherical shape with pore formation in the chitosan walls. SEM analysis confirms that at higher NaOH concentrations, the larger the size of the microcapsules. This technique shows that by tuning NaOH concentration it is possible to efficiently control the release rate of encapsulated active agents demonstrating great potential as insect repellent for textiles.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/34138
url http://hdl.handle.net/1822/34138
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0102-695X
10.1016/j.bjp.2014.11.007
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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)
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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)
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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