Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000200228 |
Resumo: | Development of new ceramic membranes has recently grown due to its superior thermal and mechanical stability. An interesting approach to manufacture asymmetric membranes is the production of aligned pore structure by the freeze-casting method. The lack of studies involving membrane production with tubular freeze-cast substrates warrants more research. In this study, a novel tubular freeze-cast alumina substrate was used for deposition of a silica top layer. The substrate showed radially aligned pores, indicating precise structure control. The obtained pore structure shows high potential for membrane manufacture. The silica layer was produced by the sol-gel method and dip-coated on the substrates with two different withdrawal speeds. The microporous silica showed pores smaller than 2 nm. The highest withdrawal speed resulted in broader substrate coverage. However, a uniform silica layer was only obtained after a second deposition. These results confirm the viability to use tubular freeze-cast substrates for production of nanofiltration membranes. |
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Materials research (São Carlos. Online) |
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Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast SubstratesFreeze-castingTubular SubstratesSol-gelAsymmetric MembranesDevelopment of new ceramic membranes has recently grown due to its superior thermal and mechanical stability. An interesting approach to manufacture asymmetric membranes is the production of aligned pore structure by the freeze-casting method. The lack of studies involving membrane production with tubular freeze-cast substrates warrants more research. In this study, a novel tubular freeze-cast alumina substrate was used for deposition of a silica top layer. The substrate showed radially aligned pores, indicating precise structure control. The obtained pore structure shows high potential for membrane manufacture. The silica layer was produced by the sol-gel method and dip-coated on the substrates with two different withdrawal speeds. The microporous silica showed pores smaller than 2 nm. The highest withdrawal speed resulted in broader substrate coverage. However, a uniform silica layer was only obtained after a second deposition. These results confirm the viability to use tubular freeze-cast substrates for production of nanofiltration membranes.ABM, ABC, ABPol2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000200228Materials Research v.22 n.2 2019reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2018-0639info:eu-repo/semantics/openAccessAthayde,Daniel DornellasDolabella,Ana Clara AmadoDias,Bruno CunhaSousa,Bruno MacielSilva,Débora Guimarães daVasconcelos,Daniela Cordeiro LeiteVasconcelos,Wander Luizeng2019-02-08T00:00:00Zoai:scielo:S1516-14392019000200228Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2019-02-08T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
title |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
spellingShingle |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates Athayde,Daniel Dornellas Freeze-casting Tubular Substrates Sol-gel Asymmetric Membranes |
title_short |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
title_full |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
title_fullStr |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
title_full_unstemmed |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
title_sort |
Production and Characterization of a Silica-Alumina Membrane Using Novel Tubular Freeze-Cast Substrates |
author |
Athayde,Daniel Dornellas |
author_facet |
Athayde,Daniel Dornellas Dolabella,Ana Clara Amado Dias,Bruno Cunha Sousa,Bruno Maciel Silva,Débora Guimarães da Vasconcelos,Daniela Cordeiro Leite Vasconcelos,Wander Luiz |
author_role |
author |
author2 |
Dolabella,Ana Clara Amado Dias,Bruno Cunha Sousa,Bruno Maciel Silva,Débora Guimarães da Vasconcelos,Daniela Cordeiro Leite Vasconcelos,Wander Luiz |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Athayde,Daniel Dornellas Dolabella,Ana Clara Amado Dias,Bruno Cunha Sousa,Bruno Maciel Silva,Débora Guimarães da Vasconcelos,Daniela Cordeiro Leite Vasconcelos,Wander Luiz |
dc.subject.por.fl_str_mv |
Freeze-casting Tubular Substrates Sol-gel Asymmetric Membranes |
topic |
Freeze-casting Tubular Substrates Sol-gel Asymmetric Membranes |
description |
Development of new ceramic membranes has recently grown due to its superior thermal and mechanical stability. An interesting approach to manufacture asymmetric membranes is the production of aligned pore structure by the freeze-casting method. The lack of studies involving membrane production with tubular freeze-cast substrates warrants more research. In this study, a novel tubular freeze-cast alumina substrate was used for deposition of a silica top layer. The substrate showed radially aligned pores, indicating precise structure control. The obtained pore structure shows high potential for membrane manufacture. The silica layer was produced by the sol-gel method and dip-coated on the substrates with two different withdrawal speeds. The microporous silica showed pores smaller than 2 nm. The highest withdrawal speed resulted in broader substrate coverage. However, a uniform silica layer was only obtained after a second deposition. These results confirm the viability to use tubular freeze-cast substrates for production of nanofiltration membranes. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
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=S1516-14392019000200228 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000200228 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2018-0639 |
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 |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.22 n.2 2019 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212674667806720 |