Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/14443 |
Resumo: | Starch films appear as an alternative to problematic non-biodegradable plastic films; however, they have low water resistance and require the addition of a hydrophobic component to be viable substitutes for non-biodegradable films. Beeswax is a biodegradable and hydrophobic substance, mostly composed of esters, hydrocarbons and fatty acids. In this context, the objectives of this work were to reduce the interaction of corn starch films with water through the incorporation of different levels of beeswax and evaluate the surface hydrophobicity and the water vapor permeation properties of these films. The films were obtained via continuous casting to establish a pre-pilot processing scenario. The application of continuous casting to obtain the starch/beeswax films resulted in a productivity, at least, 50 times greater compared to the conventional bench casting reported in the literature. Advanced scanning electron microscopy images showed the immiscibility of the beeswax domains and the starch matrix, sufficient to alter the interaction of light with the films, reducing their transparency and clarity and increasing their opacity. In addition, these domains induced the starch matrix to crystallize even with the reduced crystallinity of the wax in the domains. The interaction between the wax and the starch, suggested by ATR-FTIR, directly influenced the properties of the films. The tensile strength was reduced by 39%, the maximum and at break elongation were reduced by 60% and 58%, respectively, while the elastic modulus increased by 327% with the wax content. Finally, the addition of increasing levels of beeswax increased surface hydrophobicity by 100% and reduced the water vapor permeability of the films by 200%, reaching the goal of making them less susceptible to the effect of moisture. |
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Luchesi, Bruno RibeiroMarconcini, José Manoelhttp://lattes.cnpq.br/5373845785326215Moreira, Francys Kley Vieirahttp://lattes.cnpq.br/7156680316782417http://lattes.cnpq.br/25556392374073524da16701-d46e-4664-9667-1ec794735e352021-06-28T11:11:07Z2021-06-28T11:11:07Z2019-08-09LUCHESI, Bruno Ribeiro. Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo. 2019. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14443.https://repositorio.ufscar.br/handle/ufscar/14443Starch films appear as an alternative to problematic non-biodegradable plastic films; however, they have low water resistance and require the addition of a hydrophobic component to be viable substitutes for non-biodegradable films. Beeswax is a biodegradable and hydrophobic substance, mostly composed of esters, hydrocarbons and fatty acids. In this context, the objectives of this work were to reduce the interaction of corn starch films with water through the incorporation of different levels of beeswax and evaluate the surface hydrophobicity and the water vapor permeation properties of these films. The films were obtained via continuous casting to establish a pre-pilot processing scenario. The application of continuous casting to obtain the starch/beeswax films resulted in a productivity, at least, 50 times greater compared to the conventional bench casting reported in the literature. Advanced scanning electron microscopy images showed the immiscibility of the beeswax domains and the starch matrix, sufficient to alter the interaction of light with the films, reducing their transparency and clarity and increasing their opacity. In addition, these domains induced the starch matrix to crystallize even with the reduced crystallinity of the wax in the domains. The interaction between the wax and the starch, suggested by ATR-FTIR, directly influenced the properties of the films. The tensile strength was reduced by 39%, the maximum and at break elongation were reduced by 60% and 58%, respectively, while the elastic modulus increased by 327% with the wax content. Finally, the addition of increasing levels of beeswax increased surface hydrophobicity by 100% and reduced the water vapor permeability of the films by 200%, reaching the goal of making them less susceptible to the effect of moisture.Filmes de amido surgem como uma alternativa aos problemáticos filmes plásticos não-biodegradáveis; no entanto, possuem baixa resistência à água e carecem da adição de um componente hidrofóbico para serem substitutos viáveis aos filmes não-biodegradáveis. A cera de abelha é uma substância biodegradável e hidrofóbica, composta majoritariamente por ésteres, hidrocarbonetos e ácidos graxos. Neste contexto, os objetivos deste trabalho foram reduzir a interação de filmes de amido de milho com água através da incorporação de diferentes teores de cera de abelha e avaliar as propriedades de hidrofobicidade superficial e de permeação a vapor d’água destes filmes. Os filmes foram produzidos via casting contínuo, de forma a estabelecer um cenário pré-piloto de processamento. A aplicação do casting contínuo para a obtenção dos filmes de amido/cera de abelha resultou numa produtividade, pelo menos, 50 vezes maior em relação ao casting de bancada convencional reportado na literatura. Imagens de microscopias ótica e eletrônica de varredura mostraram a imiscibilidade dos domínios de cera de abelha na matriz de amido, suficiente para alterar a interação da luz com os filmes, reduzindo sua transparência e claridade e aumentando sua opacidade. Além disso, estes domínios induziram a cristalização da matriz de amido mesmo com a redução da cristalinidade da cera nos domínios. A interação entre a cera e o amido, sugerida por ATR-FTIR, influenciou diretamente as propriedades dos filmes. A resistência à tração foi reduzida em 39%, os alongamentos máximo e na ruptura foram reduzidos em 60% e 58%, respectivamente, enquanto o módulo elástico aumentou em 327% com o teor de cera. Por fim, a adição de teores crescentes de cera de abelha aumentou em 100% a hidrofobicidade superficial e reduziu em 200% a permeabilidade a vapor d’água dos filmes, alcançando o objetivo de torná-los menos susceptíveis ao efeito da umidade.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)169720/2017-9porUniversidade 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 de milhoCera de abelhaHidrofobicidadeCasting contínuoCorn starchBeeswaxHydrophobicityContinuous castingENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOSDesenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuoDevelopment of starch films incorporated with bee wax by continuous castinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis600600837168ce-7bcb-428f-b56f-2a4440a823eereponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALBruno Ribeiro Luchesi - Dissertação.pdfBruno Ribeiro Luchesi - Dissertação.pdfDissertação - versão finalapplication/pdf2162683https://repositorio.ufscar.br/bitstream/ufscar/14443/1/Bruno%20Ribeiro%20Luchesi%20-%20Disserta%c3%a7%c3%a3o.pdf6172169540b473f22480c11bbf3a826aMD51BCO carta comprovante autoarquivamento - P.pdfBCO carta comprovante autoarquivamento - P.pdfCarta comprovante de autoarquivamento assinada pelo orientadorapplication/pdf925573https://repositorio.ufscar.br/bitstream/ufscar/14443/2/BCO%20carta%20comprovante%20autoarquivamento%20-%20P.pdf4fab9a42f5f1b052ea929a13cea45514MD52CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/14443/3/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD53TEXTBruno Ribeiro Luchesi - Dissertação.pdf.txtBruno Ribeiro Luchesi - Dissertação.pdf.txtExtracted texttext/plain129713https://repositorio.ufscar.br/bitstream/ufscar/14443/4/Bruno%20Ribeiro%20Luchesi%20-%20Disserta%c3%a7%c3%a3o.pdf.txteb053c00da231d280e63269af49649a4MD54BCO carta comprovante autoarquivamento - P.pdf.txtBCO carta comprovante autoarquivamento - P.pdf.txtExtracted texttext/plain1https://repositorio.ufscar.br/bitstream/ufscar/14443/6/BCO%20carta%20comprovante%20autoarquivamento%20-%20P.pdf.txt68b329da9893e34099c7d8ad5cb9c940MD56THUMBNAILBruno Ribeiro Luchesi - Dissertação.pdf.jpgBruno Ribeiro Luchesi - Dissertação.pdf.jpgIM Thumbnailimage/jpeg8650https://repositorio.ufscar.br/bitstream/ufscar/14443/5/Bruno%20Ribeiro%20Luchesi%20-%20Disserta%c3%a7%c3%a3o.pdf.jpg641cb442230003e460dae869ca0123fdMD55BCO carta comprovante autoarquivamento - P.pdf.jpgBCO carta comprovante autoarquivamento - P.pdf.jpgIM Thumbnailimage/jpeg13918https://repositorio.ufscar.br/bitstream/ufscar/14443/7/BCO%20carta%20comprovante%20autoarquivamento%20-%20P.pdf.jpgd85da2f4f62dfd419ccc5a3f0e17ee19MD57ufscar/144432023-09-18 18:32:12.21oai:repositorio.ufscar.br:ufscar/14443Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:12Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
dc.title.alternative.eng.fl_str_mv |
Development of starch films incorporated with bee wax by continuous casting |
title |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
spellingShingle |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo Luchesi, Bruno Ribeiro Amido de milho Cera de abelha Hidrofobicidade Casting contínuo Corn starch Beeswax Hydrophobicity Continuous casting ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
title_short |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
title_full |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
title_fullStr |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
title_full_unstemmed |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
title_sort |
Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo |
author |
Luchesi, Bruno Ribeiro |
author_facet |
Luchesi, Bruno Ribeiro |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/2555639237407352 |
dc.contributor.author.fl_str_mv |
Luchesi, Bruno Ribeiro |
dc.contributor.advisor1.fl_str_mv |
Marconcini, José Manoel |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5373845785326215 |
dc.contributor.advisor-co1.fl_str_mv |
Moreira, Francys Kley Vieira |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/7156680316782417 |
dc.contributor.authorID.fl_str_mv |
4da16701-d46e-4664-9667-1ec794735e35 |
contributor_str_mv |
Marconcini, José Manoel Moreira, Francys Kley Vieira |
dc.subject.por.fl_str_mv |
Amido de milho Cera de abelha Hidrofobicidade Casting contínuo |
topic |
Amido de milho Cera de abelha Hidrofobicidade Casting contínuo Corn starch Beeswax Hydrophobicity Continuous casting ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
dc.subject.eng.fl_str_mv |
Corn starch Beeswax Hydrophobicity Continuous casting |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
description |
Starch films appear as an alternative to problematic non-biodegradable plastic films; however, they have low water resistance and require the addition of a hydrophobic component to be viable substitutes for non-biodegradable films. Beeswax is a biodegradable and hydrophobic substance, mostly composed of esters, hydrocarbons and fatty acids. In this context, the objectives of this work were to reduce the interaction of corn starch films with water through the incorporation of different levels of beeswax and evaluate the surface hydrophobicity and the water vapor permeation properties of these films. The films were obtained via continuous casting to establish a pre-pilot processing scenario. The application of continuous casting to obtain the starch/beeswax films resulted in a productivity, at least, 50 times greater compared to the conventional bench casting reported in the literature. Advanced scanning electron microscopy images showed the immiscibility of the beeswax domains and the starch matrix, sufficient to alter the interaction of light with the films, reducing their transparency and clarity and increasing their opacity. In addition, these domains induced the starch matrix to crystallize even with the reduced crystallinity of the wax in the domains. The interaction between the wax and the starch, suggested by ATR-FTIR, directly influenced the properties of the films. The tensile strength was reduced by 39%, the maximum and at break elongation were reduced by 60% and 58%, respectively, while the elastic modulus increased by 327% with the wax content. Finally, the addition of increasing levels of beeswax increased surface hydrophobicity by 100% and reduced the water vapor permeability of the films by 200%, reaching the goal of making them less susceptible to the effect of moisture. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-08-09 |
dc.date.accessioned.fl_str_mv |
2021-06-28T11:11:07Z |
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2021-06-28T11:11:07Z |
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LUCHESI, Bruno Ribeiro. Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo. 2019. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14443. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/14443 |
identifier_str_mv |
LUCHESI, Bruno Ribeiro. Desenvolvimento de filmes de amido incorporados com cera de abelha por casting contínuo. 2019. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14443. |
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Universidade Federal de São Carlos Câmpus São Carlos |
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