Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados

Detalhes bibliográficos
Autor(a) principal: Santiago, Pedro Victor Teixeira
Data de Publicação: 2018
Tipo de documento: Trabalho de conclusão de curso
Idioma: por
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/38718
Resumo: The coconut palm (Cocos nucifera L) is a common plant in Brazilian northeastern coast and its consumption has generated huge amounts of residues and other environmental problems, such as high demand for disposal area and negative visual impact caused in cities. The utilization outlook of these rubbish, as the coconut fiber, has been changing due to environmental concern and the price rise of other raw materials, as synthetic fibers. In many of the new applications found for coconut fiber, the fiber undergoes a chemical treatment, justified by multiple reasons, such as improve fiber interaction with another component or change any physical property. In this work, a new type of chemical treatment using microemulsion systems was studied. The fibers treatment was held with three micellar structure types, observing the changes in the fibers structures through characterization tests as scanning electron microscopy, thermogravimetric analysis and contact angle analysis (wettability check). Therefore, a 32 full factorial design was carried out varying the treatment time and the microemulsion oil phase concentration aiming to verify these factors influence on the fiber wetting properties. The results showed that the chemical treatment changed the fiber wettability to water-wet as the oil phase increased. The statistical study showed a wettability increase for the fibers in 4 to 6-hour treatment and 30% of oil phase (bicontinuous micelle), being that the treatment optimal point. The results of the scanning electron microscopy showed that the treatment filled the coconut fibers pores. Finally, the thermogravimetric analysis proved that the treatment was very consistent with the studied literature, since it was possible to observe the burning of hemicellulose, lignin and cellulose at different temperatures.
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spelling Santiago, Pedro Victor TeixeiraLaís Sibaldo RibeiroOliveira, Katherine Carrilho deJuviniano, Henrique Borges de MoraesDantas, Tereza Neuma de Castro2018-07-05T19:47:01Z2021-09-27T12:19:31Z2018-07-05T19:47:01Z2021-09-27T12:19:31Z2018-06-142013015031SANTIAGO, Pedro Victor Teixeira. Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados. 2018. 65f. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) - Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte, Natal, 2018.https://repositorio.ufrn.br/handle/123456789/38718The coconut palm (Cocos nucifera L) is a common plant in Brazilian northeastern coast and its consumption has generated huge amounts of residues and other environmental problems, such as high demand for disposal area and negative visual impact caused in cities. The utilization outlook of these rubbish, as the coconut fiber, has been changing due to environmental concern and the price rise of other raw materials, as synthetic fibers. In many of the new applications found for coconut fiber, the fiber undergoes a chemical treatment, justified by multiple reasons, such as improve fiber interaction with another component or change any physical property. In this work, a new type of chemical treatment using microemulsion systems was studied. The fibers treatment was held with three micellar structure types, observing the changes in the fibers structures through characterization tests as scanning electron microscopy, thermogravimetric analysis and contact angle analysis (wettability check). Therefore, a 32 full factorial design was carried out varying the treatment time and the microemulsion oil phase concentration aiming to verify these factors influence on the fiber wetting properties. The results showed that the chemical treatment changed the fiber wettability to water-wet as the oil phase increased. The statistical study showed a wettability increase for the fibers in 4 to 6-hour treatment and 30% of oil phase (bicontinuous micelle), being that the treatment optimal point. The results of the scanning electron microscopy showed that the treatment filled the coconut fibers pores. Finally, the thermogravimetric analysis proved that the treatment was very consistent with the studied literature, since it was possible to observe the burning of hemicellulose, lignin and cellulose at different temperatures.O coqueiro (Cocos nucifera L) é uma planta comum na região litorânea do Nordeste brasileiro e o seu consumo tem gerado grandes quantidades de resíduos e outros problemas ambientais, como alta demanda de área para descarte e impacto visual negativo gerado nas cidades. O cenário para aproveitamento desses resíduos, como a fibra de coco, vem mudando tanto pela preocupação ambiental quanto pelo aumento do custo de outras matérias primas, como fibras sintéticas. Em muitas das novas aplicações encontradas para a fibra de coco, elas passam por um tratamento químico, justificado por diversos motivos, como melhorar a interação da fibra com outro componente ou alterar alguma propriedade física. Neste trabalho, foi estudado um novo tipo de tratamento químico utilizando sistemas microemulsionados. Realizou-se o tratamento das fibras com três tipos de estruturas micelares, observando as modificações nas estruturas das fibras por meio de testes de caracterização como microscopia eletrônica de varredura, termogravimetria e molhabilidade. Foi realizado um planejamento experimental fatorial 32 variando o tempo de tratamento e a concentração da fase óleo da microemulsão visando verificar a influência desses fatores na molhabilidade da fibra. Os resultados mostraram que o tratamento químico aumentou a molhabilidade da fibra à água com o aumento da fase oleosa. O estudo estatístico mostrou que com o tratamento de 4 a 6 h e fase oleosa de 30% (micela bicontínua) as fibras aumentaram sua molhabilidade, sendo este o ponto ótimo de tratamento. Para os resultados da microscopia eletrônica de varredura, foi observado que o tratamento preencheu os poros das fibras de coco. Por fim, a análise termogravimétrica se mostrou muito coerente com a literatura estudada, conseguindo-se observar a queima da hemicelulose, lignina e celulose em diferentes temperaturas.ANPUniversidade Federal do Rio Grande do NorteUFRNBrasilEngenharia QuímicaFibra de cocoTratamento químicoMicroemulsãoCaracterizaçãoMicroemulsionChemical treatmentCharacterizationCoconut fiberEngenharias.Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionadosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccessporreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNTEXTEstudodasPropriedades_Santiago_2018.pdf.txtExtracted texttext/plain95643https://repositorio.ufrn.br/bitstream/123456789/38718/1/EstudodasPropriedades_Santiago_2018.pdf.txt210456bec4abd28bd056d611456da0e4MD51CC-LICENSElicense_urlapplication/octet-stream46https://repositorio.ufrn.br/bitstream/123456789/38718/2/license_url587cd8ffae15c8598ed3c46d248a3f38MD52license_textapplication/octet-stream0https://repositorio.ufrn.br/bitstream/123456789/38718/3/license_textd41d8cd98f00b204e9800998ecf8427eMD53license_rdfapplication/octet-stream0https://repositorio.ufrn.br/bitstream/123456789/38718/4/license_rdfd41d8cd98f00b204e9800998ecf8427eMD54LICENSElicense.txttext/plain756https://repositorio.ufrn.br/bitstream/123456789/38718/5/license.txta80a9cda2756d355b388cc443c3d8a43MD55ORIGINALEstudodasPropriedades_Santiago_2018.pdfMonografiaapplication/pdf1764003https://repositorio.ufrn.br/bitstream/123456789/38718/6/EstudodasPropriedades_Santiago_2018.pdf3d3c3a14db821656aac026516d729588MD56123456789/387182021-09-27 09:19:31.051oai:https://repositorio.ufrn.br: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ório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-09-27T12:19:31Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pr_BR.fl_str_mv Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
title Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
spellingShingle Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
Santiago, Pedro Victor Teixeira
Fibra de coco
Tratamento químico
Microemulsão
Caracterização
Microemulsion
Chemical treatment
Characterization
Coconut fiber
Engenharias.
title_short Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
title_full Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
title_fullStr Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
title_full_unstemmed Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
title_sort Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados
author Santiago, Pedro Victor Teixeira
author_facet Santiago, Pedro Victor Teixeira
author_role author
dc.contributor.referees1.none.fl_str_mv Oliveira, Katherine Carrilho de
dc.contributor.referees2.none.fl_str_mv Juviniano, Henrique Borges de Moraes
dc.contributor.author.fl_str_mv Santiago, Pedro Victor Teixeira
dc.contributor.advisor-co1.fl_str_mv Laís Sibaldo Ribeiro
dc.contributor.advisor1.fl_str_mv Dantas, Tereza Neuma de Castro
contributor_str_mv Laís Sibaldo Ribeiro
Dantas, Tereza Neuma de Castro
dc.subject.pr_BR.fl_str_mv Fibra de coco
Tratamento químico
Microemulsão
Caracterização
Microemulsion
Chemical treatment
Characterization
Coconut fiber
topic Fibra de coco
Tratamento químico
Microemulsão
Caracterização
Microemulsion
Chemical treatment
Characterization
Coconut fiber
Engenharias.
dc.subject.cnpq.fl_str_mv Engenharias.
description The coconut palm (Cocos nucifera L) is a common plant in Brazilian northeastern coast and its consumption has generated huge amounts of residues and other environmental problems, such as high demand for disposal area and negative visual impact caused in cities. The utilization outlook of these rubbish, as the coconut fiber, has been changing due to environmental concern and the price rise of other raw materials, as synthetic fibers. In many of the new applications found for coconut fiber, the fiber undergoes a chemical treatment, justified by multiple reasons, such as improve fiber interaction with another component or change any physical property. In this work, a new type of chemical treatment using microemulsion systems was studied. The fibers treatment was held with three micellar structure types, observing the changes in the fibers structures through characterization tests as scanning electron microscopy, thermogravimetric analysis and contact angle analysis (wettability check). Therefore, a 32 full factorial design was carried out varying the treatment time and the microemulsion oil phase concentration aiming to verify these factors influence on the fiber wetting properties. The results showed that the chemical treatment changed the fiber wettability to water-wet as the oil phase increased. The statistical study showed a wettability increase for the fibers in 4 to 6-hour treatment and 30% of oil phase (bicontinuous micelle), being that the treatment optimal point. The results of the scanning electron microscopy showed that the treatment filled the coconut fibers pores. Finally, the thermogravimetric analysis proved that the treatment was very consistent with the studied literature, since it was possible to observe the burning of hemicellulose, lignin and cellulose at different temperatures.
publishDate 2018
dc.date.accessioned.fl_str_mv 2018-07-05T19:47:01Z
2021-09-27T12:19:31Z
dc.date.available.fl_str_mv 2018-07-05T19:47:01Z
2021-09-27T12:19:31Z
dc.date.issued.fl_str_mv 2018-06-14
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.pr_BR.fl_str_mv 2013015031
dc.identifier.citation.fl_str_mv SANTIAGO, Pedro Victor Teixeira. Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados. 2018. 65f. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) - Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte, Natal, 2018.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/38718
identifier_str_mv 2013015031
SANTIAGO, Pedro Victor Teixeira. Estudo das propriedades das fibras de coco modificadas com sistemas microemulsionados. 2018. 65f. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) - Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte, Natal, 2018.
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dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv Engenharia Química
publisher.none.fl_str_mv Universidade Federal do Rio Grande do Norte
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