Surface modification of alumina nanoparticles with silane coupling agents

Detalhes bibliográficos
Autor(a) principal: Prado,Luis A. S. A.
Data de Publicação: 2010
Outros Autores: Sriyai,Montira, Ghislandi,Marcos, Barros-Timmons,Ana, Schulte,Karl
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.
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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
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