Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser.
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/870 |
Resumo: | Most reports about modification of lignocellulosics are mainly based on chemical modifications such as specific reactions on hydroxyl groups of cellulose. In this work, we describe the irradiation of Whatman 5 filter paper, microcrystalline cellulose and organosolv lignin with Nd-YAG laser pulses at 1064 nm. The chemical and structural properties of the degraded products were investigated by using FTIR and UV spectroscopies, conductimetrical and SEC analyses. While irradiation affects molar mass and polydispersity of lignin, no detrimental effects caused by Nd-YAG laser treatments were observed for cellulose samples. These results demonstrate that Nd-YAG laser can be used as a practical and selective degradation tool, opening a new field for obtaining surface modified natural fibers. |
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Botaro, Vagner RobertoSantos, Cláudio Gouvêa dosArantes Júnior, GilbertoCosta, Adilson Rodrigues da2012-06-18T18:43:37Z2012-06-18T18:43:37Z2001BOTARO, V. R.; SANTOS, C. G. dos; ARANTES JÚNIOR, G. Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. Applied Surface Science, v. 183, n.1-2, p.120–125, nov. 2001. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0169433201005712>. Acesso em: 18 jun. 2012.01694332http://www.repositorio.ufop.br/handle/123456789/870Most reports about modification of lignocellulosics are mainly based on chemical modifications such as specific reactions on hydroxyl groups of cellulose. In this work, we describe the irradiation of Whatman 5 filter paper, microcrystalline cellulose and organosolv lignin with Nd-YAG laser pulses at 1064 nm. The chemical and structural properties of the degraded products were investigated by using FTIR and UV spectroscopies, conductimetrical and SEC analyses. While irradiation affects molar mass and polydispersity of lignin, no detrimental effects caused by Nd-YAG laser treatments were observed for cellulose samples. These results demonstrate that Nd-YAG laser can be used as a practical and selective degradation tool, opening a new field for obtaining surface modified natural fibers.Applied Surface ScienceLaserCompositeModificationSurfacesChemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleO Periódico Applied Surface Science concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3310910802468info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://www.repositorio.ufop.br/bitstream/123456789/870/5/license.txt8a4605be74aa9ea9d79846c1fba20a33MD55ORIGINALARTIGO_ChemicalModificationLignocellulosic.pdfARTIGO_ChemicalModificationLignocellulosic.pdfapplication/pdf110333http://www.repositorio.ufop.br/bitstream/123456789/870/1/ARTIGO_ChemicalModificationLignocellulosic.pdf4c041829ea68dca94de92b21d45547a4MD51123456789/8702019-02-22 14:08:04.717oai:localhost: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Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-02-22T19:08:04Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
title |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
spellingShingle |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. Botaro, Vagner Roberto Laser Composite Modification Surfaces |
title_short |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
title_full |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
title_fullStr |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
title_full_unstemmed |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
title_sort |
Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. |
author |
Botaro, Vagner Roberto |
author_facet |
Botaro, Vagner Roberto Santos, Cláudio Gouvêa dos Arantes Júnior, Gilberto Costa, Adilson Rodrigues da |
author_role |
author |
author2 |
Santos, Cláudio Gouvêa dos Arantes Júnior, Gilberto Costa, Adilson Rodrigues da |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Botaro, Vagner Roberto Santos, Cláudio Gouvêa dos Arantes Júnior, Gilberto Costa, Adilson Rodrigues da |
dc.subject.por.fl_str_mv |
Laser Composite Modification Surfaces |
topic |
Laser Composite Modification Surfaces |
description |
Most reports about modification of lignocellulosics are mainly based on chemical modifications such as specific reactions on hydroxyl groups of cellulose. In this work, we describe the irradiation of Whatman 5 filter paper, microcrystalline cellulose and organosolv lignin with Nd-YAG laser pulses at 1064 nm. The chemical and structural properties of the degraded products were investigated by using FTIR and UV spectroscopies, conductimetrical and SEC analyses. While irradiation affects molar mass and polydispersity of lignin, no detrimental effects caused by Nd-YAG laser treatments were observed for cellulose samples. These results demonstrate that Nd-YAG laser can be used as a practical and selective degradation tool, opening a new field for obtaining surface modified natural fibers. |
publishDate |
2001 |
dc.date.issued.fl_str_mv |
2001 |
dc.date.accessioned.fl_str_mv |
2012-06-18T18:43:37Z |
dc.date.available.fl_str_mv |
2012-06-18T18:43:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BOTARO, V. R.; SANTOS, C. G. dos; ARANTES JÚNIOR, G. Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. Applied Surface Science, v. 183, n.1-2, p.120–125, nov. 2001. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0169433201005712>. Acesso em: 18 jun. 2012. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/870 |
dc.identifier.issn.none.fl_str_mv |
01694332 |
identifier_str_mv |
BOTARO, V. R.; SANTOS, C. G. dos; ARANTES JÚNIOR, G. Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser. Applied Surface Science, v. 183, n.1-2, p.120–125, nov. 2001. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0169433201005712>. Acesso em: 18 jun. 2012. 01694332 |
url |
http://www.repositorio.ufop.br/handle/123456789/870 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Applied Surface Science |
publisher.none.fl_str_mv |
Applied Surface Science |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFOP instname:Universidade Federal de Ouro Preto (UFOP) instacron:UFOP |
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Universidade Federal de Ouro Preto (UFOP) |
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UFOP |
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UFOP |
reponame_str |
Repositório Institucional da UFOP |
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Repositório Institucional da UFOP |
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repositorio@ufop.edu.br |
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