Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/1166 |
Resumo: | Hydrogels derived from cellulose acetate propionate (CAP) and cellulose acetate (CA) were synthesized with the cross-linking agents PMDA (Pyromellitic Dianhydride) and BTDA (Dianhydride 3, 3 ', 4, 4' Benzophenone Tetracarboxylated) with 3:1 stoichiometry in relation to the mass of the crosslinker agent x mass of available hydroxyls in the polymer chain. The gels were obtained in the form of films and particles, the raw materials were characterized with Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Spectroscopy in Region of Fourier Transform Infrared (FTIR) and in relation to the degree of substitution (GS). The gels synthesized were characterized using FTIR techniques in order to show the esterification, TGA and DSC to perform comparative analysis and study of thermal properties between the CAP and CA reagents and gels, and Scanning Electron Microscopy (SEM) were used for observation of the gels synthesized and the geometry of the particles obtained, the porosity of observation and observation of surface changes, was performed to determine the crosslinking density of the second theory of Flory Rehner, study the density of the gels, and degree of swelling of the study best solvent for swelling of the gels. Gels derived from CAP were tested in the adsorption studies and controlled release of the herbicide paraquat. For the phenomenon of controlled release, we studied the phenomena of transport and release curves. The release profiles were studied by using the mathematical model published by Korsmeyer-Peppas and the mainly results has showed that model was appropriated for process data analysis of controlled release in long periods. |
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Dantas, Patrícia AllueBotaro, Vagner Robertohttp://lattes.cnpq.br/2907189124654066Fraceto, Leonardo Fernandeshttp://lattes.cnpq.br/4741480538883395Caraschi, José Cláudiohttp://lattes.cnpq.br/5729302235544407Waldman, Walter Ruggerihttp://lattes.cnpq.br/0616238673458322http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4236697A50966600e-de89-448f-9a78-5226b84373282016-06-02T19:19:54Z2012-11-232016-06-02T19:19:54Z2011-12-16DANTAS, Patrícia Allue. Hydrogels Superabsorbents of Cellulose Acetate Propionate and Cellulose Acetate: Synthesis, Characterization and Controlled Release of Pesticide. 2011. 157 f. Dissertação (Mestrado em Materiais Funcionais e Polímeros de Fontes Renováveis) - Universidade Federal de São Carlos, Sorocaba, 2011.https://repositorio.ufscar.br/handle/ufscar/1166Hydrogels derived from cellulose acetate propionate (CAP) and cellulose acetate (CA) were synthesized with the cross-linking agents PMDA (Pyromellitic Dianhydride) and BTDA (Dianhydride 3, 3 ', 4, 4' Benzophenone Tetracarboxylated) with 3:1 stoichiometry in relation to the mass of the crosslinker agent x mass of available hydroxyls in the polymer chain. The gels were obtained in the form of films and particles, the raw materials were characterized with Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Spectroscopy in Region of Fourier Transform Infrared (FTIR) and in relation to the degree of substitution (GS). The gels synthesized were characterized using FTIR techniques in order to show the esterification, TGA and DSC to perform comparative analysis and study of thermal properties between the CAP and CA reagents and gels, and Scanning Electron Microscopy (SEM) were used for observation of the gels synthesized and the geometry of the particles obtained, the porosity of observation and observation of surface changes, was performed to determine the crosslinking density of the second theory of Flory Rehner, study the density of the gels, and degree of swelling of the study best solvent for swelling of the gels. Gels derived from CAP were tested in the adsorption studies and controlled release of the herbicide paraquat. For the phenomenon of controlled release, we studied the phenomena of transport and release curves. The release profiles were studied by using the mathematical model published by Korsmeyer-Peppas and the mainly results has showed that model was appropriated for process data analysis of controlled release in long periods.Hidrogéis derivados de Propionato Acetato de Celulose (CAP) e Acetato de Celulose (CA) foram sintetizados com os agentes reticuladores PMDA (Dianidrido Piromelítico) e BTDA (Dianidrido 3, 3´, 4, 4´ Benzofenona Tetracarboxílico), com estequiometrias 3:1 em relação à massa do agente reticulador x massa de hidroxilas disponíveis na cadeia polimérica, com obtenção de géis em formato de filmes e particulados; as matérias-primas foram caracterizadas com Análise Termogravimétrica (TGA), Calorimetria Diferencial de Varredura (DSC), Espectroscopia na Região do Infravermelho com Transformada de Fourier (FTIR) e em relação ao Grau de Substituição (GS). Os géis sintetizados foram caracterizados utilizando as técnicas de FTIR, para evidenciação da esterificação; TGA e DSC para realização de análise comparativa e estudo das propriedades térmicas entre os reagentes CAP e CA e os géis obtidos; e Microscopia Eletrônica de Varredura (MEV), utilizada para observação dos géis sintetizados em relação à geometria das partículas obtidas, observação da porosidade e observação de alterações superficiais; foi realizada a determinação da densidade de ligações cruzadas segundo a Teoria de Flory Rehner; estudo da densidade dos géis, que variaram de 0,4 a 1,51 g/cm3; grau de inchamento que obteve variações entre os diferentes géis de 6,53 à 11,8; e o estudo do melhor solvente para intumescimento dos géis. Nos géis derivados de CAP, foram realizados ensaios de adsorção e liberação controlada do herbicida Paraquat. Para o fenômeno de liberação controlada, foram estudados os fenômenos de transporte e as curvas de liberação; os perfis de liberação foram estudados pelo modelo matemático de Korsmeyer-Peppas; e apresentaram como o gel com maior porcentagem de adsorção e melhor potencial para liberação controlada por longos períodos o gel CAP 3B1.Financiadora de Estudos e Projetosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência dos Materiais - PPGCM-SoUFSCarBRhidrogéispropionato acetato de celulosepesticidacellulose acetate propionatecellulose acetatesynthesischaracterizationcontrolled releasepesticideparaquatENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAGéis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticidaHydrogels Superabsorbents of Cellulose Acetate Propionate and Cellulose Acetate: Synthesis, Characterization and Controlled Release of Pesticideinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-14505644f-cfa6-4234-9953-ab1d7f6328b0info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDANTAS_Patricia_2011.pdfapplication/pdf2256820https://repositorio.ufscar.br/bitstream/ufscar/1166/1/DANTAS_Patricia_2011.pdfe36b1fbb6b7a53c4ba196910208d1dd3MD51TEXTDANTAS_Patricia_2011.pdf.txtDANTAS_Patricia_2011.pdf.txtExtracted texttext/plain0https://repositorio.ufscar.br/bitstream/ufscar/1166/2/DANTAS_Patricia_2011.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52THUMBNAILDANTAS_Patricia_2011.pdf.jpgDANTAS_Patricia_2011.pdf.jpgIM Thumbnailimage/jpeg5725https://repositorio.ufscar.br/bitstream/ufscar/1166/3/DANTAS_Patricia_2011.pdf.jpg4ab27e43659d44f27fd88d333d017292MD53ufscar/11662023-09-18 18:31:28.72oai:repositorio.ufscar.br:ufscar/1166Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:28Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
dc.title.alternative.eng.fl_str_mv |
Hydrogels Superabsorbents of Cellulose Acetate Propionate and Cellulose Acetate: Synthesis, Characterization and Controlled Release of Pesticide |
title |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
spellingShingle |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida Dantas, Patrícia Allue hidrogéis propionato acetato de celulose pesticida cellulose acetate propionate cellulose acetate synthesis characterization controlled release pesticide paraquat ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
title_full |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
title_fullStr |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
title_full_unstemmed |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
title_sort |
Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida |
author |
Dantas, Patrícia Allue |
author_facet |
Dantas, Patrícia Allue |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4236697A5 |
dc.contributor.author.fl_str_mv |
Dantas, Patrícia Allue |
dc.contributor.advisor1.fl_str_mv |
Botaro, Vagner Roberto |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/2907189124654066 |
dc.contributor.advisor-co1.fl_str_mv |
Fraceto, Leonardo Fernandes |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/4741480538883395 |
dc.contributor.referee1.fl_str_mv |
Caraschi, José Cláudio |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/5729302235544407 |
dc.contributor.referee2.fl_str_mv |
Waldman, Walter Ruggeri |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/0616238673458322 |
dc.contributor.authorID.fl_str_mv |
0966600e-de89-448f-9a78-5226b8437328 |
contributor_str_mv |
Botaro, Vagner Roberto Fraceto, Leonardo Fernandes Caraschi, José Cláudio Waldman, Walter Ruggeri |
dc.subject.por.fl_str_mv |
hidrogéis propionato acetato de celulose pesticida |
topic |
hidrogéis propionato acetato de celulose pesticida cellulose acetate propionate cellulose acetate synthesis characterization controlled release pesticide paraquat ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.eng.fl_str_mv |
cellulose acetate propionate cellulose acetate synthesis characterization controlled release pesticide paraquat |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
Hydrogels derived from cellulose acetate propionate (CAP) and cellulose acetate (CA) were synthesized with the cross-linking agents PMDA (Pyromellitic Dianhydride) and BTDA (Dianhydride 3, 3 ', 4, 4' Benzophenone Tetracarboxylated) with 3:1 stoichiometry in relation to the mass of the crosslinker agent x mass of available hydroxyls in the polymer chain. The gels were obtained in the form of films and particles, the raw materials were characterized with Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Spectroscopy in Region of Fourier Transform Infrared (FTIR) and in relation to the degree of substitution (GS). The gels synthesized were characterized using FTIR techniques in order to show the esterification, TGA and DSC to perform comparative analysis and study of thermal properties between the CAP and CA reagents and gels, and Scanning Electron Microscopy (SEM) were used for observation of the gels synthesized and the geometry of the particles obtained, the porosity of observation and observation of surface changes, was performed to determine the crosslinking density of the second theory of Flory Rehner, study the density of the gels, and degree of swelling of the study best solvent for swelling of the gels. Gels derived from CAP were tested in the adsorption studies and controlled release of the herbicide paraquat. For the phenomenon of controlled release, we studied the phenomena of transport and release curves. The release profiles were studied by using the mathematical model published by Korsmeyer-Peppas and the mainly results has showed that model was appropriated for process data analysis of controlled release in long periods. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011-12-16 |
dc.date.available.fl_str_mv |
2012-11-23 2016-06-02T19:19:54Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:19:54Z |
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.citation.fl_str_mv |
DANTAS, Patrícia Allue. Hydrogels Superabsorbents of Cellulose Acetate Propionate and Cellulose Acetate: Synthesis, Characterization and Controlled Release of Pesticide. 2011. 157 f. Dissertação (Mestrado em Materiais Funcionais e Polímeros de Fontes Renováveis) - Universidade Federal de São Carlos, Sorocaba, 2011. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/1166 |
identifier_str_mv |
DANTAS, Patrícia Allue. Hydrogels Superabsorbents of Cellulose Acetate Propionate and Cellulose Acetate: Synthesis, Characterization and Controlled Release of Pesticide. 2011. 157 f. Dissertação (Mestrado em Materiais Funcionais e Polímeros de Fontes Renováveis) - Universidade Federal de São Carlos, Sorocaba, 2011. |
url |
https://repositorio.ufscar.br/handle/ufscar/1166 |
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por |
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4505644f-cfa6-4234-9953-ab1d7f6328b0 |
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openAccess |
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Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Ciência dos Materiais - PPGCM-So |
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UFSCar |
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BR |
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