Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600006 |
Resumo: | Mesophase is a key issue to design carbon materials towards its properties and microstructures. The understanding of this intermediate phase has changed since it was first discovered. The removal of light molecules is necessary to produce mesophase, but the yield can be improved if other techniques, such as pressure and oxidation, can be used before they are carried out of the system, with nitrogen or vacuum. Anisotropic pitches can be produced throughout the traditional Brooks and Taylor mesophase spheres, rich in alpha-resins, or, avoiding them, with other techniques, such as solvent extraction or strong agitation, to generate, almost exclusively, beta-resins. Anisotropic pitches exhibiting almost 100% beta-resins have been melt-spun at lower temperatures, producing pitch carbon fibres of higher quality. Recent studies were able to explain why the behaviour of the pitches is so different, towards the pitch carbon fibre production, when their compositions, in terms of alpha-resins and beta-resins, change. |
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Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a reviewmesophasepitchcarbon fibersoxidationpyrolysisMesophase is a key issue to design carbon materials towards its properties and microstructures. The understanding of this intermediate phase has changed since it was first discovered. The removal of light molecules is necessary to produce mesophase, but the yield can be improved if other techniques, such as pressure and oxidation, can be used before they are carried out of the system, with nitrogen or vacuum. Anisotropic pitches can be produced throughout the traditional Brooks and Taylor mesophase spheres, rich in alpha-resins, or, avoiding them, with other techniques, such as solvent extraction or strong agitation, to generate, almost exclusively, beta-resins. Anisotropic pitches exhibiting almost 100% beta-resins have been melt-spun at lower temperatures, producing pitch carbon fibres of higher quality. Recent studies were able to explain why the behaviour of the pitches is so different, towards the pitch carbon fibre production, when their compositions, in terms of alpha-resins and beta-resins, change.Sociedade Brasileira de Química2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600006Journal of the Brazilian Chemical Society v.17 n.6 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000600006info:eu-repo/semantics/openAccessCastro,Luiz Depine deeng2006-11-29T00:00:00Zoai:scielo:S0103-50532006000600006Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-11-29T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
title |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
spellingShingle |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review Castro,Luiz Depine de mesophase pitch carbon fibers oxidation pyrolysis |
title_short |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
title_full |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
title_fullStr |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
title_full_unstemmed |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
title_sort |
Anisotropy and mesophase formation towards carbon fibre production from coal tar and petroleum pitches: a review |
author |
Castro,Luiz Depine de |
author_facet |
Castro,Luiz Depine de |
author_role |
author |
dc.contributor.author.fl_str_mv |
Castro,Luiz Depine de |
dc.subject.por.fl_str_mv |
mesophase pitch carbon fibers oxidation pyrolysis |
topic |
mesophase pitch carbon fibers oxidation pyrolysis |
description |
Mesophase is a key issue to design carbon materials towards its properties and microstructures. The understanding of this intermediate phase has changed since it was first discovered. The removal of light molecules is necessary to produce mesophase, but the yield can be improved if other techniques, such as pressure and oxidation, can be used before they are carried out of the system, with nitrogen or vacuum. Anisotropic pitches can be produced throughout the traditional Brooks and Taylor mesophase spheres, rich in alpha-resins, or, avoiding them, with other techniques, such as solvent extraction or strong agitation, to generate, almost exclusively, beta-resins. Anisotropic pitches exhibiting almost 100% beta-resins have been melt-spun at lower temperatures, producing pitch carbon fibres of higher quality. Recent studies were able to explain why the behaviour of the pitches is so different, towards the pitch carbon fibre production, when their compositions, in terms of alpha-resins and beta-resins, change. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600006 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600006 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532006000600006 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.17 n.6 2006 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318167378362368 |