Estudo da influência de cargas minerais e amido na biodegradação do PLA
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/7809 |
Resumo: | Fossile fuel-produced plastics, once consumed and incorrectly discharged into the environment, will end up as short-term non-degradable residues and will contribute to global pollution. For this reason, the use of polymers from biodegradable and renewable sources is seen as an alternative, especially for short-term use products, such as disposable products that might be suitable for composting and thus biodegrated. Many alifathic polyesters possess these desirable properties and, among them the poly (lactic acid) – PLA – is one of the most widely used and advantageous biodegradable polyesters. This work has studied the addition of mineral filler and starch to PLA, to evaluate its influence on biodegrading properties of the polymer. Formulations were subject to mechanical testing of shock and traction, DSC and TGA thermal analysis, fluidity index, organic composite biodegradation up to 120 days, mass loss evaluations, SEM analysis, artificially accelerated aging and viscosity analysis. Results have shown that mineral filler have modified crystallization and did not have any influence on the biodegradation of PLA, but have reduced the polymer`s mechanical properties. The starch has reduced crystallization on the PLA, has enhanced the biodegrading of the composite PLA + starch since it has been observed the composite had high levels of biodegradation over the 120 days period analyzed. This was verified by means of mass loss on the samples, loss of mechanical properties made evident by high brittleness seen upon handling of samples and by scanning electron microscopy. The results of artificial accelerated aging (400h), done just for PLA, have shown a decrease of 40% in mechanical tensile properties. |
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Nascimento, Mariana SanzAgnelli, José Augusto Marcondeshttp://lattes.cnpq.br/7592090152400440http://lattes.cnpq.br/42816755070150965807b0d6-6a73-421b-9204-cd16fdcafda02016-10-11T19:29:16Z2016-10-11T19:29:16Z2010-05-31NASCIMENTO, Mariana Sanz. Estudo da influência de cargas minerais e amido na biodegradação do PLA. 2010. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2010. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7809.https://repositorio.ufscar.br/handle/ufscar/7809Fossile fuel-produced plastics, once consumed and incorrectly discharged into the environment, will end up as short-term non-degradable residues and will contribute to global pollution. For this reason, the use of polymers from biodegradable and renewable sources is seen as an alternative, especially for short-term use products, such as disposable products that might be suitable for composting and thus biodegrated. Many alifathic polyesters possess these desirable properties and, among them the poly (lactic acid) – PLA – is one of the most widely used and advantageous biodegradable polyesters. This work has studied the addition of mineral filler and starch to PLA, to evaluate its influence on biodegrading properties of the polymer. Formulations were subject to mechanical testing of shock and traction, DSC and TGA thermal analysis, fluidity index, organic composite biodegradation up to 120 days, mass loss evaluations, SEM analysis, artificially accelerated aging and viscosity analysis. Results have shown that mineral filler have modified crystallization and did not have any influence on the biodegradation of PLA, but have reduced the polymer`s mechanical properties. The starch has reduced crystallization on the PLA, has enhanced the biodegrading of the composite PLA + starch since it has been observed the composite had high levels of biodegradation over the 120 days period analyzed. This was verified by means of mass loss on the samples, loss of mechanical properties made evident by high brittleness seen upon handling of samples and by scanning electron microscopy. The results of artificial accelerated aging (400h), done just for PLA, have shown a decrease of 40% in mechanical tensile properties.Os plásticos produzidos a partir de combustíveis fósseis, uma vez consumidos e descartados de forma incorreta no meio ambiente, terminarão como resíduos não degradáveis em curto prazo e contribuirão para a poluição global. Por esta razão, vê-se como alternativa o uso de polímeros de fontes renováveis e biodegradáveis, principalmente para produtos de utilização de curto prazo, como é o caso de artigos descartáveis que poderão ser compostados e assim biodegradados em prazos reduzidos. Muitos poliésteres alifáticos possuem estas desejáveis propriedades, e dentre eles, o poli (ácido lático) –PLA – é um dos mais atrativos e utilizados poliésteres biodegradáveis. Este trabalho estudou a adição de cargas minerais e amidos ao PLA, para avaliar a influência nas propriedades biodegradativas do polímero. As formulações foram submetidas a ensaios mecânicos de impacto e tração, análises térmicas de DSC e TGA, índice de fluidez, biodegradação em composto orgânico até 120 dias, avaliações de perda de massa, análises de MEV, envelhecimento artificial acelerado e avaliação de viscosidade. Os resultados mostraram que as cargas minerais modificaram a cristalização do PLA, não interferiram na biodegradação do mesmo e reduziram as propriedades mecânicas do PLA. Já o amido, reduziu a cristalização do PLA, acentuou a biodegradação da composição PLA + amido, pois observou-se que esta foi a composição que apresentou a maior perda de massa no período de 120 dias dentre as composições estudadas. A perda de propriedades mecânicas do PLA + amido foi evidente pela alta fragilidade dos corpos de prova ao manuseio e pela microscopia eletrônica de varredura. No envelhecimento artificial acelerado por 400h, realizado para o PLA puro, observou-se redução de 40% nas propriedades de tração.Não recebi financiamentoporUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarPolímerosBiodegradaçãoPoli (ácido lático)AmidoENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOSEstudo da influência de cargas minerais e amido na biodegradação do PLAinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline600600007567da-759c-46ab-a037-bd8640627838info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissMSN.pdfDissMSN.pdfapplication/pdf6361908https://repositorio.ufscar.br/bitstream/ufscar/7809/1/DissMSN.pdf3b44f7d142db6b06678154a3e30217cdMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/7809/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTDissMSN.pdf.txtDissMSN.pdf.txtExtracted texttext/plain123172https://repositorio.ufscar.br/bitstream/ufscar/7809/3/DissMSN.pdf.txt4020aeef07637086305360fc1e9cb219MD53THUMBNAILDissMSN.pdf.jpgDissMSN.pdf.jpgIM Thumbnailimage/jpeg6029https://repositorio.ufscar.br/bitstream/ufscar/7809/4/DissMSN.pdf.jpg9e4ae8d94c1a2337ed2ea81691f7b08cMD54ufscar/78092023-09-18 18:31:40.203oai:repositorio.ufscar.br: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Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:40Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
title |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
spellingShingle |
Estudo da influência de cargas minerais e amido na biodegradação do PLA Nascimento, Mariana Sanz Polímeros Biodegradação Poli (ácido lático) Amido ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
title_short |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
title_full |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
title_fullStr |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
title_full_unstemmed |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
title_sort |
Estudo da influência de cargas minerais e amido na biodegradação do PLA |
author |
Nascimento, Mariana Sanz |
author_facet |
Nascimento, Mariana Sanz |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/4281675507015096 |
dc.contributor.author.fl_str_mv |
Nascimento, Mariana Sanz |
dc.contributor.advisor1.fl_str_mv |
Agnelli, José Augusto Marcondes |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7592090152400440 |
dc.contributor.authorID.fl_str_mv |
5807b0d6-6a73-421b-9204-cd16fdcafda0 |
contributor_str_mv |
Agnelli, José Augusto Marcondes |
dc.subject.por.fl_str_mv |
Polímeros Biodegradação Poli (ácido lático) Amido |
topic |
Polímeros Biodegradação Poli (ácido lático) Amido ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
description |
Fossile fuel-produced plastics, once consumed and incorrectly discharged into the environment, will end up as short-term non-degradable residues and will contribute to global pollution. For this reason, the use of polymers from biodegradable and renewable sources is seen as an alternative, especially for short-term use products, such as disposable products that might be suitable for composting and thus biodegrated. Many alifathic polyesters possess these desirable properties and, among them the poly (lactic acid) – PLA – is one of the most widely used and advantageous biodegradable polyesters. This work has studied the addition of mineral filler and starch to PLA, to evaluate its influence on biodegrading properties of the polymer. Formulations were subject to mechanical testing of shock and traction, DSC and TGA thermal analysis, fluidity index, organic composite biodegradation up to 120 days, mass loss evaluations, SEM analysis, artificially accelerated aging and viscosity analysis. Results have shown that mineral filler have modified crystallization and did not have any influence on the biodegradation of PLA, but have reduced the polymer`s mechanical properties. The starch has reduced crystallization on the PLA, has enhanced the biodegrading of the composite PLA + starch since it has been observed the composite had high levels of biodegradation over the 120 days period analyzed. This was verified by means of mass loss on the samples, loss of mechanical properties made evident by high brittleness seen upon handling of samples and by scanning electron microscopy. The results of artificial accelerated aging (400h), done just for PLA, have shown a decrease of 40% in mechanical tensile properties. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-05-31 |
dc.date.accessioned.fl_str_mv |
2016-10-11T19:29:16Z |
dc.date.available.fl_str_mv |
2016-10-11T19:29:16Z |
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 |
NASCIMENTO, Mariana Sanz. Estudo da influência de cargas minerais e amido na biodegradação do PLA. 2010. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2010. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7809. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/7809 |
identifier_str_mv |
NASCIMENTO, Mariana Sanz. Estudo da influência de cargas minerais e amido na biodegradação do PLA. 2010. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2010. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7809. |
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https://repositorio.ufscar.br/handle/ufscar/7809 |
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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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