Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/9993 |
Resumo: | The large production of citrus residue has promoted problems in its processing and cultivation, resulting in biomass storage and environment pollution. It is estimated that 94 million tons of citrus are produced worldwide and 15.6 million residues are generated per year. Brazil has an important participation, due to the country is a world leader in the production of fruit and orange juice. Citrus biomass presents an extensive chemical diversity such as pectin, d-limonene, flavonoids and lignin, being an interesting object of study. Structural polymer present in the plant cell wall, the lignin has been used in phenolic resins, bioplastics and nanoencapsulation, for example. The fact that lignin presents as a valuable renewable raw material for the Brazilian chemical industry, the large amount of stored orange wood and the scarce literature about lignin in Citrus sinenses motived the present study. The study consisted in extracting lignin from stem, central root and secondary root from orange tree, using the TAPPI standard method, characterize lignin by Infrared (IR), Nuclear Magnetic Resonance (NMR), Elemental Analysis and Termical Analysis. The lignin contents for extractive-free orange samples were 19.80 % in the stem, 21.74% in the central root, 19.39% in the secondary root and 1,13% in the orange bagasse. The greatest amount of lignin in the orange tree was found in central root, responsible for the support of the structure of the plant, following the secondary root and the stem. The lignins from the different portions of the orange tree wood extraction by TAPPI T264 cm-97, presented low solubility in organic solvents, due to their compaction and folding that was confirmed by 13CNMR in solid state, DSC and TGA. The IR and NMR confirmed the characteristic lignin bands and the siryngil (1326 and 1115 cm-1) and guiacyl (1220 cm-1) monomers, which are found in hardwood type. Holocellulose contents found for samples of Orange bagasse (70.10%), stem (77.82%), central root (78.86) and secondary root (76.66%) extractive-free presented the expected content. The lignins from stem, central and secondary roots of orange tree wood obtained by alkaline pulping were soluble in organic solvent, as well as characteristic lignin signals for IV and NMR. The average yield between 20-24%, the solubility and the characteristics found in the MEV analysis of lignins obtained by alkaline pulping, are of interest for aplication these polymer in the encapsulation of substances and in Thermosets Composite. |
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Porto, Deyvid de SouzaSilva, Maria Fátima das Graças Fernandes dahttp://lattes.cnpq.br/0457632122660653http://lattes.cnpq.br/2541704960428633da3fb636-3b3f-44ef-bbe6-2bf1410157482018-05-14T17:43:03Z2018-05-14T17:43:03Z2017-04-20PORTO, Deyvid de Souza. Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck. 2017. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2017. Disponível em: https://repositorio.ufscar.br/handle/ufscar/9993.https://repositorio.ufscar.br/handle/ufscar/9993The large production of citrus residue has promoted problems in its processing and cultivation, resulting in biomass storage and environment pollution. It is estimated that 94 million tons of citrus are produced worldwide and 15.6 million residues are generated per year. Brazil has an important participation, due to the country is a world leader in the production of fruit and orange juice. Citrus biomass presents an extensive chemical diversity such as pectin, d-limonene, flavonoids and lignin, being an interesting object of study. Structural polymer present in the plant cell wall, the lignin has been used in phenolic resins, bioplastics and nanoencapsulation, for example. The fact that lignin presents as a valuable renewable raw material for the Brazilian chemical industry, the large amount of stored orange wood and the scarce literature about lignin in Citrus sinenses motived the present study. The study consisted in extracting lignin from stem, central root and secondary root from orange tree, using the TAPPI standard method, characterize lignin by Infrared (IR), Nuclear Magnetic Resonance (NMR), Elemental Analysis and Termical Analysis. The lignin contents for extractive-free orange samples were 19.80 % in the stem, 21.74% in the central root, 19.39% in the secondary root and 1,13% in the orange bagasse. The greatest amount of lignin in the orange tree was found in central root, responsible for the support of the structure of the plant, following the secondary root and the stem. The lignins from the different portions of the orange tree wood extraction by TAPPI T264 cm-97, presented low solubility in organic solvents, due to their compaction and folding that was confirmed by 13CNMR in solid state, DSC and TGA. The IR and NMR confirmed the characteristic lignin bands and the siryngil (1326 and 1115 cm-1) and guiacyl (1220 cm-1) monomers, which are found in hardwood type. Holocellulose contents found for samples of Orange bagasse (70.10%), stem (77.82%), central root (78.86) and secondary root (76.66%) extractive-free presented the expected content. The lignins from stem, central and secondary roots of orange tree wood obtained by alkaline pulping were soluble in organic solvent, as well as characteristic lignin signals for IV and NMR. The average yield between 20-24%, the solubility and the characteristics found in the MEV analysis of lignins obtained by alkaline pulping, are of interest for aplication these polymer in the encapsulation of substances and in Thermosets Composite.A grande produção de resíduo de citrus tem promovido problemas em seu processamento e cultivo, levando a estocagem de biomassa e poluição do meio ambiente. Estima-se que 94 milhões de toneladas de citrus sejam produzidos mundialmente e que 15,6 milhões de resíduos sejam gerados ao ano, tendo o Brasil uma considerável participação, pois é líder na produção de fruto e de suco de laranja. A biomassa cítrica apresenta uma extensa diversidade química como pectina, d-limoneno, flavonoides e lignina, mostrando-se um interessante objeto de estudo na obtenção de químicos. A lignina, polímero estrutural presente na parede celular de vegetais, tem sido utilizada em resinas fenólicas, bioplásticos e em nanoencapsulamento, por exemplo. Pelo fato da lignina apresentar-se como uma valiosa matéria-prima renovável, pela grande quantidade de madeira de laranjeira estocada e à escassa literatura sobre a lignina em Citrus sinensis motivaram o presente estudo. O trabalho consistiu em extrair a lignina de caule, raíz central e raíz secundária de laranjeira e do bagaço de laranja utilizando a norma TAPPI, caracterizar a lignina a partir de infravermelho (IV), Ressonância Magnética Nuclear (RMN), análise elementar e por análise térmica. Os teores de lignina encontrados para as amostras de laranjeira, livre de extrativos, foram de 19,80% no caule, 21,88% na raíz central, 19,39% na raíz secundária e 1,13% para o bagaço de laranja. A maior abundância de lignina na laranjeira foi encontrada na raíz central, porção responsável pela sustentação da estrutura do vegetal, juntamente a raíz secundária e ao caule. As ligninas das diferentes porções da madeira de laranjeira, livre de extrativo pela norma TAPPI T264 cm-97, apresentaram-se com baixa solubilidade em solventes orgânicos, devido sua compactação e enovelamento que foram observados através 13C RMN no estado sólido, DSC e TGA. As análises de IV e RMN confirmaram as bandas características da lignina e ainda dos monômeros siringil (1326 e 1115 cm-1) e guaiacil (1220 cm-1), encontrados em madeiras de Folhosas. Os teores de holocelulose encontrados para amostras de bagaço de laranja (70,10%), caule (77,82%), raíz central (78,86) e secundária (76,66%) de madeira de laranjeira, livre de extrativos, apresentaram valores dentro do esperado. As ligninas de caule, raíz central e secundária da madeira de laranjeira obtidas por polpação alcalina apresentaram-se solúveis em solvente orgânico e com sinais característicos de lignina em IV e RMN. O rendimento médio entre 20-24%, a solubilidade e as características encontradas nas análises por MEV para essas ligninas são interessantes na utilização das mesmas para o encapsulamento de substâncias e para compósitos termorrígidos.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPQ: 133635/2015-5porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarLignina de Citrus sinensisRMN em estado sólidoBiomassa lignocelulósicaLignin of citrus sinensisLignocellulosic biomassSolid State NMRCIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDESCIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::QUIMICA DOS PRODUTOS NATURAISAvaliação e caracterização de lignina em biomassa de Citrus sinensis L. OsberckEvaluation and characterization of lignin from biomass of Citrus sinensis L. 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dc.title.por.fl_str_mv |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
dc.title.alternative.eng.fl_str_mv |
Evaluation and characterization of lignin from biomass of Citrus sinensis L. Osberck |
title |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
spellingShingle |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck Porto, Deyvid de Souza Lignina de Citrus sinensis RMN em estado sólido Biomassa lignocelulósica Lignin of citrus sinensis Lignocellulosic biomass Solid State NMR CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDES CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::QUIMICA DOS PRODUTOS NATURAIS |
title_short |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
title_full |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
title_fullStr |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
title_full_unstemmed |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
title_sort |
Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck |
author |
Porto, Deyvid de Souza |
author_facet |
Porto, Deyvid de Souza |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/2541704960428633 |
dc.contributor.author.fl_str_mv |
Porto, Deyvid de Souza |
dc.contributor.advisor1.fl_str_mv |
Silva, Maria Fátima das Graças Fernandes da |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0457632122660653 |
dc.contributor.authorID.fl_str_mv |
da3fb636-3b3f-44ef-bbe6-2bf141015748 |
contributor_str_mv |
Silva, Maria Fátima das Graças Fernandes da |
dc.subject.por.fl_str_mv |
Lignina de Citrus sinensis RMN em estado sólido Biomassa lignocelulósica |
topic |
Lignina de Citrus sinensis RMN em estado sólido Biomassa lignocelulósica Lignin of citrus sinensis Lignocellulosic biomass Solid State NMR CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDES CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::QUIMICA DOS PRODUTOS NATURAIS |
dc.subject.eng.fl_str_mv |
Lignin of citrus sinensis Lignocellulosic biomass Solid State NMR |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDES CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::QUIMICA DOS PRODUTOS NATURAIS |
description |
The large production of citrus residue has promoted problems in its processing and cultivation, resulting in biomass storage and environment pollution. It is estimated that 94 million tons of citrus are produced worldwide and 15.6 million residues are generated per year. Brazil has an important participation, due to the country is a world leader in the production of fruit and orange juice. Citrus biomass presents an extensive chemical diversity such as pectin, d-limonene, flavonoids and lignin, being an interesting object of study. Structural polymer present in the plant cell wall, the lignin has been used in phenolic resins, bioplastics and nanoencapsulation, for example. The fact that lignin presents as a valuable renewable raw material for the Brazilian chemical industry, the large amount of stored orange wood and the scarce literature about lignin in Citrus sinenses motived the present study. The study consisted in extracting lignin from stem, central root and secondary root from orange tree, using the TAPPI standard method, characterize lignin by Infrared (IR), Nuclear Magnetic Resonance (NMR), Elemental Analysis and Termical Analysis. The lignin contents for extractive-free orange samples were 19.80 % in the stem, 21.74% in the central root, 19.39% in the secondary root and 1,13% in the orange bagasse. The greatest amount of lignin in the orange tree was found in central root, responsible for the support of the structure of the plant, following the secondary root and the stem. The lignins from the different portions of the orange tree wood extraction by TAPPI T264 cm-97, presented low solubility in organic solvents, due to their compaction and folding that was confirmed by 13CNMR in solid state, DSC and TGA. The IR and NMR confirmed the characteristic lignin bands and the siryngil (1326 and 1115 cm-1) and guiacyl (1220 cm-1) monomers, which are found in hardwood type. Holocellulose contents found for samples of Orange bagasse (70.10%), stem (77.82%), central root (78.86) and secondary root (76.66%) extractive-free presented the expected content. The lignins from stem, central and secondary roots of orange tree wood obtained by alkaline pulping were soluble in organic solvent, as well as characteristic lignin signals for IV and NMR. The average yield between 20-24%, the solubility and the characteristics found in the MEV analysis of lignins obtained by alkaline pulping, are of interest for aplication these polymer in the encapsulation of substances and in Thermosets Composite. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-04-20 |
dc.date.accessioned.fl_str_mv |
2018-05-14T17:43:03Z |
dc.date.available.fl_str_mv |
2018-05-14T17:43:03Z |
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 |
PORTO, Deyvid de Souza. Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck. 2017. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2017. Disponível em: https://repositorio.ufscar.br/handle/ufscar/9993. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/9993 |
identifier_str_mv |
PORTO, Deyvid de Souza. Avaliação e caracterização de lignina em biomassa de Citrus sinensis L. Osberck. 2017. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2017. Disponível em: https://repositorio.ufscar.br/handle/ufscar/9993. |
url |
https://repositorio.ufscar.br/handle/ufscar/9993 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.confidence.fl_str_mv |
600 600 |
dc.relation.authority.fl_str_mv |
24b0ac94-885a-4e7b-b93a-7cad21b9592e |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química - PPGQ |
dc.publisher.initials.fl_str_mv |
UFSCar |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
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Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
UFSCAR |
institution |
UFSCAR |
reponame_str |
Repositório Institucional da UFSCAR |
collection |
Repositório Institucional da UFSCAR |
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