Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/75885 |
Resumo: | In this study Eucalyptus grandis (CEG) and Pinus taeda (CPT) cellulose fibers obtained from kraft and sulfite pulping process, respectively, were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using Coats and Redfern method. FTIR results showed that CPT presented a more ordered structure with higher crystallinity than CEG. Thermogravimetric results showed that CPT had a higher thermal stability than CEG. The kinetic results revel that for CEG the degradation mechanism occurs mainly by random nucleation, although phase boundary controlled reactions also occurs while for CPT the degradation process is more related with phase boundary controlled reactions. Results demonstrated that differences between thermal stability and degradation mechanisms might be associated with differences in the cellulose crystalline structure probably caused by different pulping processes used for obtaining the cellulose fibers. |
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Poletto, MatheusPistor, ViniciusSantana, Ruth Marlene CampomanesZattera, Ademir José2013-07-16T01:45:06Z20121516-1439http://hdl.handle.net/10183/75885000856960In this study Eucalyptus grandis (CEG) and Pinus taeda (CPT) cellulose fibers obtained from kraft and sulfite pulping process, respectively, were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using Coats and Redfern method. FTIR results showed that CPT presented a more ordered structure with higher crystallinity than CEG. Thermogravimetric results showed that CPT had a higher thermal stability than CEG. The kinetic results revel that for CEG the degradation mechanism occurs mainly by random nucleation, although phase boundary controlled reactions also occurs while for CPT the degradation process is more related with phase boundary controlled reactions. Results demonstrated that differences between thermal stability and degradation mechanisms might be associated with differences in the cellulose crystalline structure probably caused by different pulping processes used for obtaining the cellulose fibers.application/pdfengMaterials research : ibero-american journal of materials [recurso eletrônico]. São Carlos, SP. vol. 15, no. 3 (May/June 2012), p. 421-427.BiomassaCeluloseEucalyptus grandisPinus taedaCelluloseCrystallinityFTIR spectroscopyThermal degradationMaterials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of celluloseinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000856960.pdf000856960.pdfTexto completo (inglês)application/pdf792137http://www.lume.ufrgs.br/bitstream/10183/75885/1/000856960.pdf430bd0b8d0b0a2fe7ac4bf08b03fc754MD51TEXT000856960.pdf.txt000856960.pdf.txtExtracted Texttext/plain32643http://www.lume.ufrgs.br/bitstream/10183/75885/2/000856960.pdf.txtd3a5a1ebe1b899e35eb1fb26fea6ee2bMD52THUMBNAIL000856960.pdf.jpg000856960.pdf.jpgGenerated Thumbnailimage/jpeg1910http://www.lume.ufrgs.br/bitstream/10183/75885/3/000856960.pdf.jpg82aad2776fd0675123efd8f046d4897fMD5310183/758852022-06-08 04:40:56.246231oai:www.lume.ufrgs.br:10183/75885Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-06-08T07:40:56Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
title |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
spellingShingle |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose Poletto, Matheus Biomassa Celulose Eucalyptus grandis Pinus taeda Cellulose Crystallinity FTIR spectroscopy Thermal degradation |
title_short |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
title_full |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
title_fullStr |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
title_full_unstemmed |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
title_sort |
Materials produced from plant biomass. Part II : evaluation of crystallinity and degradation kinetics of cellulose |
author |
Poletto, Matheus |
author_facet |
Poletto, Matheus Pistor, Vinicius Santana, Ruth Marlene Campomanes Zattera, Ademir José |
author_role |
author |
author2 |
Pistor, Vinicius Santana, Ruth Marlene Campomanes Zattera, Ademir José |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Poletto, Matheus Pistor, Vinicius Santana, Ruth Marlene Campomanes Zattera, Ademir José |
dc.subject.por.fl_str_mv |
Biomassa Celulose |
topic |
Biomassa Celulose Eucalyptus grandis Pinus taeda Cellulose Crystallinity FTIR spectroscopy Thermal degradation |
dc.subject.eng.fl_str_mv |
Eucalyptus grandis Pinus taeda Cellulose Crystallinity FTIR spectroscopy Thermal degradation |
description |
In this study Eucalyptus grandis (CEG) and Pinus taeda (CPT) cellulose fibers obtained from kraft and sulfite pulping process, respectively, were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using Coats and Redfern method. FTIR results showed that CPT presented a more ordered structure with higher crystallinity than CEG. Thermogravimetric results showed that CPT had a higher thermal stability than CEG. The kinetic results revel that for CEG the degradation mechanism occurs mainly by random nucleation, although phase boundary controlled reactions also occurs while for CPT the degradation process is more related with phase boundary controlled reactions. Results demonstrated that differences between thermal stability and degradation mechanisms might be associated with differences in the cellulose crystalline structure probably caused by different pulping processes used for obtaining the cellulose fibers. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2013-07-16T01:45:06Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/75885 |
dc.identifier.issn.pt_BR.fl_str_mv |
1516-1439 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000856960 |
identifier_str_mv |
1516-1439 000856960 |
url |
http://hdl.handle.net/10183/75885 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Materials research : ibero-american journal of materials [recurso eletrônico]. São Carlos, SP. vol. 15, no. 3 (May/June 2012), p. 421-427. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
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Repositório Institucional da UFRGS |
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