Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS)
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/18871 |
Resumo: | Thermoplastic starch is a natural and biodegradable polymer. However, it has some disadvantages attributed to its hydrophilic character, low mechanical properties and the phenomenon of retrogradation. These limitations can be overcome by mixing with biodegradable polyesters, as well as by chemically modifying the starch. In this context, blends of cassava starch with poly(butylene succinate) (PBS) and citric acid were processed in a Haake torque rheometer, followed by thermopressing. The processing speed varied at 80, 100 and 120 rpm. The content of added citric acid was 0, 1, 3 and 5 wt.%. For the gelatinization of starch, only glycerol was used as a plasticizer, in addition to its residual water. The samples were characterized by torque rheometry, water absorption measurements, water weight loss, contact angle, X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FTIR-ATR) and visual analysis. The rheometry results demonstrated a decrease in torque in the presence of citric acid, indicating the occurrence of acid hydrolysis and/or the lubricating action of the acid. The percentage of water absorbed decreased with the increase in acid content, while weight loss increased, influencing the absorption results. The contact angle decreased for the acid-containing samples. In XRD, diffraction peaks associated with residual starch crystallinity were verified, while morphological analysis demonstrated the presence of native starch granules after gelatinization. Samples processed at 120 rpm and with higher acid content showed a more homogeneous morphology between phases. In FTIR, the functional chemical groups of the polymers that make up the blend were observed. Visually, the addition of citric acid caused a change in the color of the samples. Variation in mixing speed did not significantly influence the analysis results. |
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Santos, Raul Franklin AndradeLucas, Alessandra de Almeidahttp://lattes.cnpq.br/9754332336954137Patricio, Patrícia Santiago de Oliveirahttp://lattes.cnpq.br/5625112455084806http://lattes.cnpq.br/9465976944357301https://orcid.org/0000-0003-1445-5033https://orcid.org/0000-0002-4762-60307c49f9ce-91b1-422b-8103-402472c1c2812023-11-09T18:05:35Z2023-11-09T18:05:35Z2022-08-11SANTOS, Raul Franklin Andrade. Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS). 2022. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/18871.https://repositorio.ufscar.br/handle/ufscar/18871Thermoplastic starch is a natural and biodegradable polymer. However, it has some disadvantages attributed to its hydrophilic character, low mechanical properties and the phenomenon of retrogradation. These limitations can be overcome by mixing with biodegradable polyesters, as well as by chemically modifying the starch. In this context, blends of cassava starch with poly(butylene succinate) (PBS) and citric acid were processed in a Haake torque rheometer, followed by thermopressing. The processing speed varied at 80, 100 and 120 rpm. The content of added citric acid was 0, 1, 3 and 5 wt.%. For the gelatinization of starch, only glycerol was used as a plasticizer, in addition to its residual water. The samples were characterized by torque rheometry, water absorption measurements, water weight loss, contact angle, X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FTIR-ATR) and visual analysis. The rheometry results demonstrated a decrease in torque in the presence of citric acid, indicating the occurrence of acid hydrolysis and/or the lubricating action of the acid. The percentage of water absorbed decreased with the increase in acid content, while weight loss increased, influencing the absorption results. The contact angle decreased for the acid-containing samples. In XRD, diffraction peaks associated with residual starch crystallinity were verified, while morphological analysis demonstrated the presence of native starch granules after gelatinization. Samples processed at 120 rpm and with higher acid content showed a more homogeneous morphology between phases. In FTIR, the functional chemical groups of the polymers that make up the blend were observed. Visually, the addition of citric acid caused a change in the color of the samples. Variation in mixing speed did not significantly influence the analysis results.O amido termoplástico é um polímero natural e biodegradável. Contudo, apresenta algumas desvantagens atribuídas a seu caráter hidrofílico, baixas propriedades mecânicas e ao fenômeno de retrogradação. Essas limitações, podem ser contornadas através da mistura com poliésteres biodegradáveis, como também mediante a modificação química do amido. Nesse contexto, blendas de amido de mandioca com poli(butileno succinato) (PBS) e ácido cítrico, foram processadas em um reômetro de torque Haake, seguido de termoprensagem. A velocidade de processamento variou em 80, 100 e 120 rpm. O teor do ácido cítrico adicionado foi de 0, 1, 3 e 5%. Para a gelatinização do amido, foi utilizado apenas o glicerol como plastificante, além da água residual do mesmo. As amostras foram caracterizadas por reometria de torque, medidas de absorção de água, perda de massa em água, ângulo de contato, difração de raios-X (DRX), microscopia eletrônica de varredura (MEV), espectroscopia de infravermelho (FTIR-ATR) e análise visual. Os resultados de reometria demonstraram diminuição no torque, na presença do ácido cítrico, indicando a ocorrência de hidrólise ácida e/ou a ação lubrificante do ácido. O percentual de água absorvida diminuiu, com o aumento do teor do ácido, enquanto a perda de massa aumentou, influenciando nos resultados de absorção. O ângulo de contato diminuiu para as amostras contendo ácido. No DRX foram verificados picos de difração associados a cristalinidade residual do amido, enquanto a análise morfológica demonstrou a presença de grânulos de amido nativo após a gelatinização. As amostras processadas a 120 rpm e com maior teor de ácido, apresentaram uma morfologia mais homogênea entre as fases. No FTIR foi observado os grupos químicos funcionais dos polímeros que compõem a blenda. Visualmente, a adição do ácido cítrico provocou mudança na coloração das amostras. A variação da velocidade de mistura não influenciou significativamente nos resultados das análises.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)132347/2020-2porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessAmido termoplásticoPoli(butileno succinato)BlendaThermoplastic starchPoly(butylene succinate)BlendENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOSProcessamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS)Reactive processing of thermoplastic starch/poly(butylene succinate) (TPS/PBS) blendsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis600600fcfd8644-306a-47ee-890d-b6b3c0c8d672reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALRaul Franklin Andrade Santos - Dissertação.pdfRaul Franklin Andrade Santos - Dissertação.pdfRaul Franklin Andrade Santos - Dissertaçãoapplication/pdf3949341https://repositorio.ufscar.br/bitstream/ufscar/18871/1/Raul%20Franklin%20Andrade%20Santos%20-%20Disserta%c3%a7%c3%a3o.pdf7d28c94a84a3d79e16972d4adb86dccaMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8810https://repositorio.ufscar.br/bitstream/ufscar/18871/2/license_rdff337d95da1fce0a22c77480e5e9a7aecMD52TEXTRaul Franklin Andrade Santos - Dissertação.pdf.txtRaul Franklin Andrade Santos - Dissertação.pdf.txtExtracted texttext/plain182598https://repositorio.ufscar.br/bitstream/ufscar/18871/3/Raul%20Franklin%20Andrade%20Santos%20-%20Disserta%c3%a7%c3%a3o.pdf.txt696047334deed57ac8fcd7280c64eb3aMD53ufscar/188712024-05-14 17:20:05.43oai:repositorio.ufscar.br:ufscar/18871Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222024-05-14T17:20:05Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
dc.title.alternative.eng.fl_str_mv |
Reactive processing of thermoplastic starch/poly(butylene succinate) (TPS/PBS) blends |
title |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
spellingShingle |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) Santos, Raul Franklin Andrade Amido termoplástico Poli(butileno succinato) Blenda Thermoplastic starch Poly(butylene succinate) Blend ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
title_short |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
title_full |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
title_fullStr |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
title_full_unstemmed |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
title_sort |
Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS) |
author |
Santos, Raul Franklin Andrade |
author_facet |
Santos, Raul Franklin Andrade |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/9465976944357301 |
dc.contributor.authororcid.por.fl_str_mv |
https://orcid.org/0000-0003-1445-5033 |
dc.contributor.advisor1orcid.por.fl_str_mv |
https://orcid.org/0000-0002-4762-6030 |
dc.contributor.author.fl_str_mv |
Santos, Raul Franklin Andrade |
dc.contributor.advisor1.fl_str_mv |
Lucas, Alessandra de Almeida |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9754332336954137 |
dc.contributor.advisor-co1.fl_str_mv |
Patricio, Patrícia Santiago de Oliveira |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/5625112455084806 |
dc.contributor.authorID.fl_str_mv |
7c49f9ce-91b1-422b-8103-402472c1c281 |
contributor_str_mv |
Lucas, Alessandra de Almeida Patricio, Patrícia Santiago de Oliveira |
dc.subject.por.fl_str_mv |
Amido termoplástico Poli(butileno succinato) Blenda |
topic |
Amido termoplástico Poli(butileno succinato) Blenda Thermoplastic starch Poly(butylene succinate) Blend ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
dc.subject.eng.fl_str_mv |
Thermoplastic starch Poly(butylene succinate) Blend |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
description |
Thermoplastic starch is a natural and biodegradable polymer. However, it has some disadvantages attributed to its hydrophilic character, low mechanical properties and the phenomenon of retrogradation. These limitations can be overcome by mixing with biodegradable polyesters, as well as by chemically modifying the starch. In this context, blends of cassava starch with poly(butylene succinate) (PBS) and citric acid were processed in a Haake torque rheometer, followed by thermopressing. The processing speed varied at 80, 100 and 120 rpm. The content of added citric acid was 0, 1, 3 and 5 wt.%. For the gelatinization of starch, only glycerol was used as a plasticizer, in addition to its residual water. The samples were characterized by torque rheometry, water absorption measurements, water weight loss, contact angle, X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FTIR-ATR) and visual analysis. The rheometry results demonstrated a decrease in torque in the presence of citric acid, indicating the occurrence of acid hydrolysis and/or the lubricating action of the acid. The percentage of water absorbed decreased with the increase in acid content, while weight loss increased, influencing the absorption results. The contact angle decreased for the acid-containing samples. In XRD, diffraction peaks associated with residual starch crystallinity were verified, while morphological analysis demonstrated the presence of native starch granules after gelatinization. Samples processed at 120 rpm and with higher acid content showed a more homogeneous morphology between phases. In FTIR, the functional chemical groups of the polymers that make up the blend were observed. Visually, the addition of citric acid caused a change in the color of the samples. Variation in mixing speed did not significantly influence the analysis results. |
publishDate |
2022 |
dc.date.issued.fl_str_mv |
2022-08-11 |
dc.date.accessioned.fl_str_mv |
2023-11-09T18:05:35Z |
dc.date.available.fl_str_mv |
2023-11-09T18:05:35Z |
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 |
SANTOS, Raul Franklin Andrade. Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS). 2022. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/18871. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/18871 |
identifier_str_mv |
SANTOS, Raul Franklin Andrade. Processamento reativo de blendas de amido termoplástico/poli(butileno succinato) (TPS/PBS). 2022. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/18871. |
url |
https://repositorio.ufscar.br/handle/ufscar/18871 |
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por |
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600 600 |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
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openAccess |
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Universidade Federal de São Carlos Câmpus São Carlos |
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Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
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UFSCar |
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Universidade Federal de São Carlos Câmpus São Carlos |
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