Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite

Detalhes bibliográficos
Autor(a) principal: Alves,Ana P. M.
Data de Publicação: 2013
Outros Autores: Fonseca,Maria G., Wanderley,Albaneide Fernandes
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=S1516-14392013000400028
Resumo: The reactivity of clay minerals leached in grafting reactions was investigated. Precursor solids were prepared by treating the sodium vermiculites with nitric acid solutions at several concentrations. The lixiviation produced the restructured porous solids with surface area over a wide range, varying from 133 to 673 m² g- 1. The sodium and lixiviated vermiculites reacted covalently with silylating agent, 3-aminopropyltrimethoxysilane, to attach this agent onto the inorganic surface, through the free available silanols. The products were characterized by CNH elemental analysis, infrared spectroscopy, X-ray diffraction, nuclear magnetic resonance in the solid state for carbon and silicon. CHN data expressed by significant contents of anchored organic chains, up to 2.14 mmol g- 1, as the degree of leaching was increased. The success of this investigation is directly related to the leaching of the natural vermiculite, which is strongly influenced by the reactivity of the abundant original source.
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spelling Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculitevermiculiteorganoclaysselective leachingsilylationThe reactivity of clay minerals leached in grafting reactions was investigated. Precursor solids were prepared by treating the sodium vermiculites with nitric acid solutions at several concentrations. The lixiviation produced the restructured porous solids with surface area over a wide range, varying from 133 to 673 m² g- 1. The sodium and lixiviated vermiculites reacted covalently with silylating agent, 3-aminopropyltrimethoxysilane, to attach this agent onto the inorganic surface, through the free available silanols. The products were characterized by CNH elemental analysis, infrared spectroscopy, X-ray diffraction, nuclear magnetic resonance in the solid state for carbon and silicon. CHN data expressed by significant contents of anchored organic chains, up to 2.14 mmol g- 1, as the degree of leaching was increased. The success of this investigation is directly related to the leaching of the natural vermiculite, which is strongly influenced by the reactivity of the abundant original source.ABM, ABC, ABPol2013-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400028Materials Research v.16 n.4 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000076info:eu-repo/semantics/openAccessAlves,Ana P. M.Fonseca,Maria G.Wanderley,Albaneide Fernandeseng2013-08-02T00:00:00Zoai:scielo:S1516-14392013000400028Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-08-02T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
title Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
spellingShingle Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
Alves,Ana P. M.
vermiculite
organoclays
selective leaching
silylation
title_short Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
title_full Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
title_fullStr Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
title_full_unstemmed Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
title_sort Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
author Alves,Ana P. M.
author_facet Alves,Ana P. M.
Fonseca,Maria G.
Wanderley,Albaneide Fernandes
author_role author
author2 Fonseca,Maria G.
Wanderley,Albaneide Fernandes
author2_role author
author
dc.contributor.author.fl_str_mv Alves,Ana P. M.
Fonseca,Maria G.
Wanderley,Albaneide Fernandes
dc.subject.por.fl_str_mv vermiculite
organoclays
selective leaching
silylation
topic vermiculite
organoclays
selective leaching
silylation
description The reactivity of clay minerals leached in grafting reactions was investigated. Precursor solids were prepared by treating the sodium vermiculites with nitric acid solutions at several concentrations. The lixiviation produced the restructured porous solids with surface area over a wide range, varying from 133 to 673 m² g- 1. The sodium and lixiviated vermiculites reacted covalently with silylating agent, 3-aminopropyltrimethoxysilane, to attach this agent onto the inorganic surface, through the free available silanols. The products were characterized by CNH elemental analysis, infrared spectroscopy, X-ray diffraction, nuclear magnetic resonance in the solid state for carbon and silicon. CHN data expressed by significant contents of anchored organic chains, up to 2.14 mmol g- 1, as the degree of leaching was increased. The success of this investigation is directly related to the leaching of the natural vermiculite, which is strongly influenced by the reactivity of the abundant original source.
publishDate 2013
dc.date.none.fl_str_mv 2013-08-01
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=S1516-14392013000400028
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400028
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000076
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.16 n.4 2013
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_ 1754212662920609792

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