Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides

Detalhes bibliográficos
Autor(a) principal: Oliveira, Erick Falcão de
Data de Publicação: 2012
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
Texto Completo: http://www.repositorio.ufc.br/handle/riufc/17261
Resumo: Aiming to preserve the properties and optimize the encapsulation of the Lippia sidoides essential oil (LSEO), this work reports on the preparation of chitosan-gum nanoparticles loaded with LSEO by spray-drying, using gums extracted from native trees of northeast of Brazil. The gums used were extracted from exudates of Anacardium Occidentale tree (Cashew gum), Sterculia striata trees (Chichá gum) and Anadenanthera macrocarpa trees (Angico gum). Samples were characterized by FTIR and UV/VIS spectroscopy, particle size and zeta potential, thermal analysis (TGA/DSC) and gas chromatography (GC-MS). The FTIR spectrum showed the main bands of chitosan and gums, in 1550 and 1647 cm-1. Particle sizes ranged from 17 nm to 800 nm, where the angico gum matrix presented the smallest sizes and cashew gum matrix the larger sizes. The zeta potential varied from -40 mV +30 mV, where chichá gum matrix presented the biggest variation. Thermal analysis showed the events of mass loss for the samples, where up to 200° C there are a maximum of 20% mass lost compared to the initial mass. The encapsulation of LSEO ranged between 6 and 16%, where the cashew gum and chichá gum matrixes presented the highest values. Cashew gum samples showed good encapsulation stability after 12 months, where the encapsulated oil content has not changed. The encapsulated oil did not present significant difference in its composition to the initial oil, encapsulating the key components. The release of LSEO from the matrixes was relatively slow, where between 60 and 100% of the oil was released in 48 hours. The kinetic study of LSEO release indicated that the release followed the Higuchi model, with the release by the samples varying between fickians and non-fickians phenomena.
id UFC-7_a77225045e2c902ef84ab327504fd929
oai_identifier_str oai:repositorio.ufc.br:riufc/17261
network_acronym_str UFC-7
network_name_str Repositório Institucional da Universidade Federal do Ceará (UFC)
repository_id_str
spelling Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia SidoidesMatrices of brazilian gums encapsulating Lippia sidoides essential oilQuímicaQuitosanaGomasEssências e óleos essenciaisLippia sidoidesEncapsulamentoAiming to preserve the properties and optimize the encapsulation of the Lippia sidoides essential oil (LSEO), this work reports on the preparation of chitosan-gum nanoparticles loaded with LSEO by spray-drying, using gums extracted from native trees of northeast of Brazil. The gums used were extracted from exudates of Anacardium Occidentale tree (Cashew gum), Sterculia striata trees (Chichá gum) and Anadenanthera macrocarpa trees (Angico gum). Samples were characterized by FTIR and UV/VIS spectroscopy, particle size and zeta potential, thermal analysis (TGA/DSC) and gas chromatography (GC-MS). The FTIR spectrum showed the main bands of chitosan and gums, in 1550 and 1647 cm-1. Particle sizes ranged from 17 nm to 800 nm, where the angico gum matrix presented the smallest sizes and cashew gum matrix the larger sizes. The zeta potential varied from -40 mV +30 mV, where chichá gum matrix presented the biggest variation. Thermal analysis showed the events of mass loss for the samples, where up to 200° C there are a maximum of 20% mass lost compared to the initial mass. The encapsulation of LSEO ranged between 6 and 16%, where the cashew gum and chichá gum matrixes presented the highest values. Cashew gum samples showed good encapsulation stability after 12 months, where the encapsulated oil content has not changed. The encapsulated oil did not present significant difference in its composition to the initial oil, encapsulating the key components. The release of LSEO from the matrixes was relatively slow, where between 60 and 100% of the oil was released in 48 hours. The kinetic study of LSEO release indicated that the release followed the Higuchi model, with the release by the samples varying between fickians and non-fickians phenomena.Com o objetivo de preservar as propriedades e otimizar o encapsulamento do óleo essencial de Lippia sidoides (OELS), foi preparado nanopartículas de quitosana e goma carregadas com OELS via spray-drying, usando gomas nativas da região do Nordeste brasileiro. As gomas foram extraídas dos exsudatos das árvores da Anacardium Occidentale (goma do cajueiro), Sterculia striata (goma do chichá) e Anadenanthera macrocarpa (goma do angico). As nanopartículas foram caracterizadas por espectroscopia na região do infravermelho (FTIR) e na região do UV/VIS, tamanho de partículas e potencial zeta, análise térmica (TGA/DSC), e cromatografia gasosa (GC-MS). O espectro do FTIR mostrou as principais bandas da quitosana e das gomas, em 1550 e em 1647 cm-1. Observou-se diferentes propriedades nas nanopartículas em função do tipo de matriz utilizada. As partículas produzidas apresentaram tamanho de 17 a 800 nm, onde a matriz de goma do cajueiro produziu as partículas maiores, e a matriz de goma do chichá as partículas menores. O potencial zeta variou de -40 mV a +30 mV, onde houve maior variação quando utilizou-se a matriz com goma do chichá. A análise térmica evidenciou os eventos de perda de massa para as amostras, onde até 200 °C as amostras perdem no máximo 20% da sua massa inicial. O encapsulamento do OELS variou entre 6 e 16 %, onde as matrizes com goma do cajueiro e do chichá apresentaram os maiores valores. As amostras com goma do cajueiro apresentaram boa estabilidade de encapsulamento após 12 meses, onde o teor de óleo encapsulado não se alterou. A análise por cromatografia gasosa mostrou que o óleo encapsulado não apresentou em sua composição diferença significativa à do óleo inicial, encapsulando os principais componentes. A liberação do OELS pelas matrizes foi relativamente lenta, onde entre 60 e 100% do óleo foi liberado em 48 horas. O estudo cinético da liberação do OELS indicou que a liberação segue o modelo de Higuchi, com a liberação pelas amostras variando entre fenômenos fickianos e não-fickianos.Paula, Haroldo César Beserra deOliveira, Erick Falcão de2016-05-31T23:18:28Z2016-05-31T23:18:28Z2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfOLIVEIRA, Erick Falcão de. Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides. 2012. 78 f. Dissertação (Mestrado em química)- Universidade Federal do Ceará, Fortaleza-CE, 2012.http://www.repositorio.ufc.br/handle/riufc/17261porreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFCinfo:eu-repo/semantics/openAccess2019-07-04T18:33:55Zoai:repositorio.ufc.br:riufc/17261Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T18:15:49.129780Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.none.fl_str_mv Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
Matrices of brazilian gums encapsulating Lippia sidoides essential oil
title Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
spellingShingle Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
Oliveira, Erick Falcão de
Química
Quitosana
Gomas
Essências e óleos essenciais
Lippia sidoides
Encapsulamento
title_short Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
title_full Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
title_fullStr Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
title_full_unstemmed Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
title_sort Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides
author Oliveira, Erick Falcão de
author_facet Oliveira, Erick Falcão de
author_role author
dc.contributor.none.fl_str_mv Paula, Haroldo César Beserra de
dc.contributor.author.fl_str_mv Oliveira, Erick Falcão de
dc.subject.por.fl_str_mv Química
Quitosana
Gomas
Essências e óleos essenciais
Lippia sidoides
Encapsulamento
topic Química
Quitosana
Gomas
Essências e óleos essenciais
Lippia sidoides
Encapsulamento
description Aiming to preserve the properties and optimize the encapsulation of the Lippia sidoides essential oil (LSEO), this work reports on the preparation of chitosan-gum nanoparticles loaded with LSEO by spray-drying, using gums extracted from native trees of northeast of Brazil. The gums used were extracted from exudates of Anacardium Occidentale tree (Cashew gum), Sterculia striata trees (Chichá gum) and Anadenanthera macrocarpa trees (Angico gum). Samples were characterized by FTIR and UV/VIS spectroscopy, particle size and zeta potential, thermal analysis (TGA/DSC) and gas chromatography (GC-MS). The FTIR spectrum showed the main bands of chitosan and gums, in 1550 and 1647 cm-1. Particle sizes ranged from 17 nm to 800 nm, where the angico gum matrix presented the smallest sizes and cashew gum matrix the larger sizes. The zeta potential varied from -40 mV +30 mV, where chichá gum matrix presented the biggest variation. Thermal analysis showed the events of mass loss for the samples, where up to 200° C there are a maximum of 20% mass lost compared to the initial mass. The encapsulation of LSEO ranged between 6 and 16%, where the cashew gum and chichá gum matrixes presented the highest values. Cashew gum samples showed good encapsulation stability after 12 months, where the encapsulated oil content has not changed. The encapsulated oil did not present significant difference in its composition to the initial oil, encapsulating the key components. The release of LSEO from the matrixes was relatively slow, where between 60 and 100% of the oil was released in 48 hours. The kinetic study of LSEO release indicated that the release followed the Higuchi model, with the release by the samples varying between fickians and non-fickians phenomena.
publishDate 2012
dc.date.none.fl_str_mv 2012
2016-05-31T23:18:28Z
2016-05-31T23:18:28Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv OLIVEIRA, Erick Falcão de. Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides. 2012. 78 f. Dissertação (Mestrado em química)- Universidade Federal do Ceará, Fortaleza-CE, 2012.
http://www.repositorio.ufc.br/handle/riufc/17261
identifier_str_mv OLIVEIRA, Erick Falcão de. Matrizes de gomas regionais para o encapsulamento do óleo essencial de Lippia Sidoides. 2012. 78 f. Dissertação (Mestrado em química)- Universidade Federal do Ceará, Fortaleza-CE, 2012.
url http://www.repositorio.ufc.br/handle/riufc/17261
dc.language.iso.fl_str_mv por
language por
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.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
_version_ 1813028728268128256