Surface modification of alumina nanoparticles with silane coupling agents
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Outros Autores: | , , , |
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=S0103-50532010001200010 |
Resumo: | In the present paper we describe the surface modification of alumina nanoparticles using epoxy-containing alkoxysilanes (silane coupling agents, SCA). The materials were characterized using infrared spectroscopy and solid-state nuclear magnetic resonance. Whereas, neat alumina nanoparticles could be expectedly modified with the afore mentioned SCA, as evidenced by 13C CPMAS NMR, the presence of arylsulphonates at the surface of alumina caused the ring-opening polymerization of the epoxide. This polymerization reaction facilitated the surface modification of alumina by the SCA. X-ray powder diffraction and 27Al MAS NMR clearly demonstrated that in spite of the SCA polymerization, there were neither structural changes nor phase transitions in the alumina after the surface modification. The surface modification decreased the thermal stability of alumina, in comparison to pristine alumina nanoparticles. |
id |
SBQ-2_2833bcc605d5f4360642b8c976175d79 |
---|---|
oai_identifier_str |
oai:scielo:S0103-50532010001200010 |
network_acronym_str |
SBQ-2 |
network_name_str |
Journal of the Brazilian Chemical Society (Online) |
repository_id_str |
|
spelling |
Surface modification of alumina nanoparticles with silane coupling agentsaluminasurface functionalizationstructure-properties relationshipthermal stabilityIn the present paper we describe the surface modification of alumina nanoparticles using epoxy-containing alkoxysilanes (silane coupling agents, SCA). The materials were characterized using infrared spectroscopy and solid-state nuclear magnetic resonance. Whereas, neat alumina nanoparticles could be expectedly modified with the afore mentioned SCA, as evidenced by 13C CPMAS NMR, the presence of arylsulphonates at the surface of alumina caused the ring-opening polymerization of the epoxide. This polymerization reaction facilitated the surface modification of alumina by the SCA. X-ray powder diffraction and 27Al MAS NMR clearly demonstrated that in spite of the SCA polymerization, there were neither structural changes nor phase transitions in the alumina after the surface modification. The surface modification decreased the thermal stability of alumina, in comparison to pristine alumina nanoparticles.Sociedade Brasileira de Química2010-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010001200010Journal of the Brazilian Chemical Society v.21 n.12 2010reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532010001200010info:eu-repo/semantics/openAccessPrado,Luis A. S. A.Sriyai,MontiraGhislandi,MarcosBarros-Timmons,AnaSchulte,Karleng2010-12-16T00:00:00Zoai:scielo:S0103-50532010001200010Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2010-12-16T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Surface modification of alumina nanoparticles with silane coupling agents |
title |
Surface modification of alumina nanoparticles with silane coupling agents |
spellingShingle |
Surface modification of alumina nanoparticles with silane coupling agents Prado,Luis A. S. A. alumina surface functionalization structure-properties relationship thermal stability |
title_short |
Surface modification of alumina nanoparticles with silane coupling agents |
title_full |
Surface modification of alumina nanoparticles with silane coupling agents |
title_fullStr |
Surface modification of alumina nanoparticles with silane coupling agents |
title_full_unstemmed |
Surface modification of alumina nanoparticles with silane coupling agents |
title_sort |
Surface modification of alumina nanoparticles with silane coupling agents |
author |
Prado,Luis A. S. A. |
author_facet |
Prado,Luis A. S. A. Sriyai,Montira Ghislandi,Marcos Barros-Timmons,Ana Schulte,Karl |
author_role |
author |
author2 |
Sriyai,Montira Ghislandi,Marcos Barros-Timmons,Ana Schulte,Karl |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Prado,Luis A. S. A. Sriyai,Montira Ghislandi,Marcos Barros-Timmons,Ana Schulte,Karl |
dc.subject.por.fl_str_mv |
alumina surface functionalization structure-properties relationship thermal stability |
topic |
alumina surface functionalization structure-properties relationship thermal stability |
description |
In the present paper we describe the surface modification of alumina nanoparticles using epoxy-containing alkoxysilanes (silane coupling agents, SCA). The materials were characterized using infrared spectroscopy and solid-state nuclear magnetic resonance. Whereas, neat alumina nanoparticles could be expectedly modified with the afore mentioned SCA, as evidenced by 13C CPMAS NMR, the presence of arylsulphonates at the surface of alumina caused the ring-opening polymerization of the epoxide. This polymerization reaction facilitated the surface modification of alumina by the SCA. X-ray powder diffraction and 27Al MAS NMR clearly demonstrated that in spite of the SCA polymerization, there were neither structural changes nor phase transitions in the alumina after the surface modification. The surface modification decreased the thermal stability of alumina, in comparison to pristine alumina nanoparticles. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-12-01 |
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=S0103-50532010001200010 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010001200010 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532010001200010 |
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.21 n.12 2010 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_ |
1750318171554840576 |