Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/28976 |
Resumo: | In this study, blends were developed from biodegradable polymers and polyaniline (PANI) in order to obtain conductive and smart packaging with possible application in the food segment. The blends were characterized according to morphological (optical microscopy and SEM), structural (FTIR, RAMAN), thermal (TGA) and electrical (Hall effect) properties. The main polymers used in the blends were based on two biodegradable polymers: whey protein isolate (WPI) and chitosan. First, PANI was synthesized in its conductive form b y doping it with dodecylbenzene sulphonic acid and it was characterized according to structural (FTIR, RAMAN), Thermal (TGA) and electrical (Hall effect) properties. Based on the Hall effect analyses, PANI presented high conductive values and positive charge carriers, showing the efficiency of the proposed synthesis. After that, blends of WPI and different concentrations of PANI (20, 40, 60, 80 e 100 mg/mL) were synthesized. These blends presented immiscible and low conductivity (10 -3 S/cm). The chitosan and PANI blends were synthesized using four different formulations: chitosan and PANI (i); chitosan, PANI and glutaraldehyde (ii); chitosan, PANI and glycerol (iii); and, chitosan, PANI, glutaraldehyde and glycerol (iv). Firstly, formulation i and ii were synthesized with factorial design with 3 replications and differents concentrations: 20, 40, 60, 80 e 100 mg/mL of PANI, 2% of chitosan dissolved into 2% acetic acid water solution and 0 mL ou 6,25 x 10 -³ μL of glutaraldehyde. Among these formulations, all presented negative charge carriers and higher conductivity values were observed for PANI concentration of 80 mg/mL and 100 mg/mL, presenting 10 -1 S/cm value and 10 -2 S/cm without and with glutaraldehyde, respectively. When formulation iii and iv were synthesized using completely randomized design with 3 replications and differents concentrations: 80 mg/mL and 100 mg/mL of PANI, 1% and 2% of chitosan dissolved into 2% acetic acid water solution; 10%, 20%, 30 % of glycerol and 0 mL ou 6,25 x 10-³ μL of glutaraldehyde. In this new group of formulations the charge carriers were negative. When morphological and electrical properties were analyzed together, the best results were obtained with 2% of chitosan and 80 or 100 mg/mL of PANI reaching conductivity values of 10 -1 S/cm. However, between the iii and iv formulation the glutaraldehyde was not efficient in its cross-linked action, as a reduction in the thickness of the films was not observed, what happened for formulations i and ii. The glycerol was efficient to increase chitosan/PANI blend conductivity. The association glycerol-glutaraldehyde was the most efficient to increase the blends conductivity because the increase reached 789% when it was compared 2% chitosan, 100 mg/mL of PANI and glutaraldehyde blend with and without glycerol; and a 239,8% increase when 2% chitosan, 100 mg/mL of PANI blend was compared to 2% chitosan, 100 mg/mL of PANI and 30% of glycerol. |
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Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentesInteration study between biodegradable polymers and polyanilines for the development of intelligent conductive packagingEmbalagens inteligentesPolímeros biodegradáveisPolianilinaQuitosanaSmart PackagingBiodegradable polymersPolyanilineChitosanCiência de AlimentosIn this study, blends were developed from biodegradable polymers and polyaniline (PANI) in order to obtain conductive and smart packaging with possible application in the food segment. The blends were characterized according to morphological (optical microscopy and SEM), structural (FTIR, RAMAN), thermal (TGA) and electrical (Hall effect) properties. The main polymers used in the blends were based on two biodegradable polymers: whey protein isolate (WPI) and chitosan. First, PANI was synthesized in its conductive form b y doping it with dodecylbenzene sulphonic acid and it was characterized according to structural (FTIR, RAMAN), Thermal (TGA) and electrical (Hall effect) properties. Based on the Hall effect analyses, PANI presented high conductive values and positive charge carriers, showing the efficiency of the proposed synthesis. After that, blends of WPI and different concentrations of PANI (20, 40, 60, 80 e 100 mg/mL) were synthesized. These blends presented immiscible and low conductivity (10 -3 S/cm). The chitosan and PANI blends were synthesized using four different formulations: chitosan and PANI (i); chitosan, PANI and glutaraldehyde (ii); chitosan, PANI and glycerol (iii); and, chitosan, PANI, glutaraldehyde and glycerol (iv). Firstly, formulation i and ii were synthesized with factorial design with 3 replications and differents concentrations: 20, 40, 60, 80 e 100 mg/mL of PANI, 2% of chitosan dissolved into 2% acetic acid water solution and 0 mL ou 6,25 x 10 -³ μL of glutaraldehyde. Among these formulations, all presented negative charge carriers and higher conductivity values were observed for PANI concentration of 80 mg/mL and 100 mg/mL, presenting 10 -1 S/cm value and 10 -2 S/cm without and with glutaraldehyde, respectively. When formulation iii and iv were synthesized using completely randomized design with 3 replications and differents concentrations: 80 mg/mL and 100 mg/mL of PANI, 1% and 2% of chitosan dissolved into 2% acetic acid water solution; 10%, 20%, 30 % of glycerol and 0 mL ou 6,25 x 10-³ μL of glutaraldehyde. In this new group of formulations the charge carriers were negative. When morphological and electrical properties were analyzed together, the best results were obtained with 2% of chitosan and 80 or 100 mg/mL of PANI reaching conductivity values of 10 -1 S/cm. However, between the iii and iv formulation the glutaraldehyde was not efficient in its cross-linked action, as a reduction in the thickness of the films was not observed, what happened for formulations i and ii. The glycerol was efficient to increase chitosan/PANI blend conductivity. The association glycerol-glutaraldehyde was the most efficient to increase the blends conductivity because the increase reached 789% when it was compared 2% chitosan, 100 mg/mL of PANI and glutaraldehyde blend with and without glycerol; and a 239,8% increase when 2% chitosan, 100 mg/mL of PANI blend was compared to 2% chitosan, 100 mg/mL of PANI and 30% of glycerol.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Neste trabalho foram desenvolvidas blendas a partir de polímeros biodegradáveis e polianilina (PANI) de forma a se obter embalagem condutora e inteligente com possível aplicação na área alimentícia. As blendas foram caracterizadas segundo propriedades morfológicas (microscopia ótica e MEV), estruturais (FTIR, Raman), térmicas (TGA) e elétricas (efeito Hall). As matrizes poliméricas das blendas foram baseadas em dois polímeros biodegradáveis: isolado proteico de soro do leite (IPS) e quitosana. Inicialmente, sintetizou-se PANI em sua forma condutora graças à dopagem com ácido dodecilbenzeno sulfônico e a caracterizou-se de acordo com as propriedades estruturais (FTIR, Raman), térmicas (TGA) e elétricas (efeito Hall). De acordo com as análises de efeito Hall, PANI apresentou elevados valores de condutividade e portadores de carga positivos, mostrando a eficiência da síntese proposta. Após isso, sintetizaram-se blendas de IPS e diferentes concentrações de PANI (20, 40, 60, 80 e 100 mg/mL). Essas blendas apresentaram imiscíveis e com baixa condutividade (10 -3 S/cm). As blendas de quitosana e PANI foram sintetizadas a partir de quatro formulações bases diferentes: quitosana e PANI (i); quitosana, PANI e glutaraldeído (ii); quitosana, PANI e glicerol (iii); e, quitosana, PANI, glutaraldeído e glicerol (iv). Primeiramente, sintetizou-se as formulações i e ii a partir de um planejamento fatorial com 3 repetições para diferentes concentrações: 20, 40, 60, 80 e 100 mg/mL de PANI, 2% de quitosana dissolvida em solução aquosa de 2% de ácido acético e 0 mL ou 6,25 x 10 -³ μL de glutaraldeído. Dentre essas formulações, todas apresentaram portadores de carga negativos e maiores valores de condutividade foram observados para concentrações de PANI de 80 mg/mL e 100 mg/mL, apresentando valores de 10 -1 S/cm e 10 -2 S/cm em ausência e presença de glutaraldeído, respectivamente. A se sintetizar as formulações iii e iv, utilizou-se delineamento inteiramente casualizado com 3 repetições para as seguintes concentrações: 80 mg/mL e 100 mg/mL para PANI, 1% e 2% de quitosana dissolvida em solução aquosa de 2% de ácido acético, 10%, 20%, 30 % de glicerol e 0 e 6,25x10 -3 μL de glutaraldeído. Nesse novo conjunto de formulações, as blendas apresentaram portadores de carga negativos e os melhores resultados quando analisados em conjunto propriedades morfológicas e elétricas foram as que possuem 2% de quitosana, 80 ou 100 mg/mL de PANI e 30% de glicerol obtendo valores de condutividade na ordem de 10 -1 S/cm. Contudo, entre as formulações iii e iv a presença do glutaraldeído não foi efetiva no seu poder reticulador, uma vez que não se observou redução na espessura dos filmes, fato observado para as formulações i e ii. O glicerol se mostrou eficiente no aumento da condutividade de blendas de quitosana/PANI. A associação glicerolglutaraldeído se mostrou ser ainda mais eficiente para incrementar a condutividade das blendas, pois o aumento chegou a ser de 789% quando se compara blendas de 2% quitosana, 100 mg/mL de PANI e glutaraldeído com e sem glicerol; e de 239,8% quando se compara blendas de 2% de quitosana e 100 mg/mL de PANI com blendas de 2% de quitosana, 100 mg/mL de PANI, glutaraldeído e 30% de glicerol.Universidade Federal de LavrasPrograma de Pós-Graduação em Ciência dos AlimentosUFLAbrasilDepartamento de Ciência dos AlimentosBorges, Soraia VilelaRocha, Roney Alves daRocha, Roney Alves daUgucioni, Júlio CésarOliveira, Cassiano Rodrigues deOliveira, Ana Carolina Salgado de2018-04-03T16:01:28Z2018-04-03T16:01:28Z2018-04-022018-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfOLIVEIRA, A. C. S. de. Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes. 2018. 114 p. Dissertação (Mestrado em Ciências dos Alimentos)-Universidade Federal de Lavras, Lavras, 2018.http://repositorio.ufla.br/jspui/handle/1/28976porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLA2023-05-04T13:16:08Zoai:localhost:1/28976Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-04T13:16:08Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes Interation study between biodegradable polymers and polyanilines for the development of intelligent conductive packaging |
title |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes |
spellingShingle |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes Oliveira, Ana Carolina Salgado de Embalagens inteligentes Polímeros biodegradáveis Polianilina Quitosana Smart Packaging Biodegradable polymers Polyaniline Chitosan Ciência de Alimentos |
title_short |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes |
title_full |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes |
title_fullStr |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes |
title_full_unstemmed |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes |
title_sort |
Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes |
author |
Oliveira, Ana Carolina Salgado de |
author_facet |
Oliveira, Ana Carolina Salgado de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Borges, Soraia Vilela Rocha, Roney Alves da Rocha, Roney Alves da Ugucioni, Júlio César Oliveira, Cassiano Rodrigues de |
dc.contributor.author.fl_str_mv |
Oliveira, Ana Carolina Salgado de |
dc.subject.por.fl_str_mv |
Embalagens inteligentes Polímeros biodegradáveis Polianilina Quitosana Smart Packaging Biodegradable polymers Polyaniline Chitosan Ciência de Alimentos |
topic |
Embalagens inteligentes Polímeros biodegradáveis Polianilina Quitosana Smart Packaging Biodegradable polymers Polyaniline Chitosan Ciência de Alimentos |
description |
In this study, blends were developed from biodegradable polymers and polyaniline (PANI) in order to obtain conductive and smart packaging with possible application in the food segment. The blends were characterized according to morphological (optical microscopy and SEM), structural (FTIR, RAMAN), thermal (TGA) and electrical (Hall effect) properties. The main polymers used in the blends were based on two biodegradable polymers: whey protein isolate (WPI) and chitosan. First, PANI was synthesized in its conductive form b y doping it with dodecylbenzene sulphonic acid and it was characterized according to structural (FTIR, RAMAN), Thermal (TGA) and electrical (Hall effect) properties. Based on the Hall effect analyses, PANI presented high conductive values and positive charge carriers, showing the efficiency of the proposed synthesis. After that, blends of WPI and different concentrations of PANI (20, 40, 60, 80 e 100 mg/mL) were synthesized. These blends presented immiscible and low conductivity (10 -3 S/cm). The chitosan and PANI blends were synthesized using four different formulations: chitosan and PANI (i); chitosan, PANI and glutaraldehyde (ii); chitosan, PANI and glycerol (iii); and, chitosan, PANI, glutaraldehyde and glycerol (iv). Firstly, formulation i and ii were synthesized with factorial design with 3 replications and differents concentrations: 20, 40, 60, 80 e 100 mg/mL of PANI, 2% of chitosan dissolved into 2% acetic acid water solution and 0 mL ou 6,25 x 10 -³ μL of glutaraldehyde. Among these formulations, all presented negative charge carriers and higher conductivity values were observed for PANI concentration of 80 mg/mL and 100 mg/mL, presenting 10 -1 S/cm value and 10 -2 S/cm without and with glutaraldehyde, respectively. When formulation iii and iv were synthesized using completely randomized design with 3 replications and differents concentrations: 80 mg/mL and 100 mg/mL of PANI, 1% and 2% of chitosan dissolved into 2% acetic acid water solution; 10%, 20%, 30 % of glycerol and 0 mL ou 6,25 x 10-³ μL of glutaraldehyde. In this new group of formulations the charge carriers were negative. When morphological and electrical properties were analyzed together, the best results were obtained with 2% of chitosan and 80 or 100 mg/mL of PANI reaching conductivity values of 10 -1 S/cm. However, between the iii and iv formulation the glutaraldehyde was not efficient in its cross-linked action, as a reduction in the thickness of the films was not observed, what happened for formulations i and ii. The glycerol was efficient to increase chitosan/PANI blend conductivity. The association glycerol-glutaraldehyde was the most efficient to increase the blends conductivity because the increase reached 789% when it was compared 2% chitosan, 100 mg/mL of PANI and glutaraldehyde blend with and without glycerol; and a 239,8% increase when 2% chitosan, 100 mg/mL of PANI blend was compared to 2% chitosan, 100 mg/mL of PANI and 30% of glycerol. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-04-03T16:01:28Z 2018-04-03T16:01:28Z 2018-04-02 2018-03-01 |
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, A. C. S. de. Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes. 2018. 114 p. Dissertação (Mestrado em Ciências dos Alimentos)-Universidade Federal de Lavras, Lavras, 2018. http://repositorio.ufla.br/jspui/handle/1/28976 |
identifier_str_mv |
OLIVEIRA, A. C. S. de. Estudo da interação entre polímeros biodegradáveis e polianilina para o desenvolvimento de embalagens condutoras e inteligentes. 2018. 114 p. Dissertação (Mestrado em Ciências dos Alimentos)-Universidade Federal de Lavras, Lavras, 2018. |
url |
http://repositorio.ufla.br/jspui/handle/1/28976 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Lavras Programa de Pós-Graduação em Ciência dos Alimentos UFLA brasil Departamento de Ciência dos Alimentos |
publisher.none.fl_str_mv |
Universidade Federal de Lavras Programa de Pós-Graduação em Ciência dos Alimentos UFLA brasil Departamento de Ciência dos Alimentos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
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UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
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1807835100119826432 |