Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles
Autor(a) principal: | |
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Data de Publicação: | 2017 |
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=S1516-14392017000300736 |
Resumo: | Magnetic nanoparticles can improve the efficiency of phase separation time in multi-stage operations when a magnetic field is present. As such operations involve contact with aqueous and/or organic solutions, hydrophilic magnetic nanoparticles synthesized through the co-precipitation method were functionalized with oleic acid to attain hydrophobic magnetic nanoparticles. Both nanoparticles were characterized morphologically, chemically and magnetically. The results revealed that the particles (size ≈ 10 nm) consisted of an iron oxide mixture of magnetite and maghemite. The functionalization with oleic acid was effective in converting them into hydrophobic nanoparticles. Both particles were ferro/ferrimagnetic and the presence of oleic acid did not interfere significantly in the saturation magnetization value. The chemical stability of both nanoparticles were also evaluated, as an attempt of simulating broad industrial conditions to which the nanoparticles may be subjected; the hydrophilic nanoparticles were resistant at pH ≥ 4, while the hydrophobic nanoparticles were stable at pH ≥ 3. |
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Materials research (São Carlos. Online) |
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Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic NanoparticlesMagnetic NanoparticlesChemical StabilityOleic AcidHydrophilic NanoparticlesHydrophobic NanoparticlesMagnetic nanoparticles can improve the efficiency of phase separation time in multi-stage operations when a magnetic field is present. As such operations involve contact with aqueous and/or organic solutions, hydrophilic magnetic nanoparticles synthesized through the co-precipitation method were functionalized with oleic acid to attain hydrophobic magnetic nanoparticles. Both nanoparticles were characterized morphologically, chemically and magnetically. The results revealed that the particles (size ≈ 10 nm) consisted of an iron oxide mixture of magnetite and maghemite. The functionalization with oleic acid was effective in converting them into hydrophobic nanoparticles. Both particles were ferro/ferrimagnetic and the presence of oleic acid did not interfere significantly in the saturation magnetization value. The chemical stability of both nanoparticles were also evaluated, as an attempt of simulating broad industrial conditions to which the nanoparticles may be subjected; the hydrophilic nanoparticles were resistant at pH ≥ 4, while the hydrophobic nanoparticles were stable at pH ≥ 3.ABM, ABC, ABPol2017-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000300736Materials Research v.20 n.3 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2016-0707info:eu-repo/semantics/openAccessLobato,Natália Cristina CandianMansur,Marcelo BorgesFerreira,Angela de Melloeng2017-06-23T00:00:00Zoai:scielo:S1516-14392017000300736Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2017-06-23T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
title |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
spellingShingle |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles Lobato,Natália Cristina Candian Magnetic Nanoparticles Chemical Stability Oleic Acid Hydrophilic Nanoparticles Hydrophobic Nanoparticles |
title_short |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
title_full |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
title_fullStr |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
title_full_unstemmed |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
title_sort |
Characterization and Chemical Stability of Hydrophilic and Hydrophobic Magnetic Nanoparticles |
author |
Lobato,Natália Cristina Candian |
author_facet |
Lobato,Natália Cristina Candian Mansur,Marcelo Borges Ferreira,Angela de Mello |
author_role |
author |
author2 |
Mansur,Marcelo Borges Ferreira,Angela de Mello |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Lobato,Natália Cristina Candian Mansur,Marcelo Borges Ferreira,Angela de Mello |
dc.subject.por.fl_str_mv |
Magnetic Nanoparticles Chemical Stability Oleic Acid Hydrophilic Nanoparticles Hydrophobic Nanoparticles |
topic |
Magnetic Nanoparticles Chemical Stability Oleic Acid Hydrophilic Nanoparticles Hydrophobic Nanoparticles |
description |
Magnetic nanoparticles can improve the efficiency of phase separation time in multi-stage operations when a magnetic field is present. As such operations involve contact with aqueous and/or organic solutions, hydrophilic magnetic nanoparticles synthesized through the co-precipitation method were functionalized with oleic acid to attain hydrophobic magnetic nanoparticles. Both nanoparticles were characterized morphologically, chemically and magnetically. The results revealed that the particles (size ≈ 10 nm) consisted of an iron oxide mixture of magnetite and maghemite. The functionalization with oleic acid was effective in converting them into hydrophobic nanoparticles. Both particles were ferro/ferrimagnetic and the presence of oleic acid did not interfere significantly in the saturation magnetization value. The chemical stability of both nanoparticles were also evaluated, as an attempt of simulating broad industrial conditions to which the nanoparticles may be subjected; the hydrophilic nanoparticles were resistant at pH ≥ 4, while the hydrophobic nanoparticles were stable at pH ≥ 3. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-06-01 |
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=S1516-14392017000300736 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000300736 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2016-0707 |
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.20 n.3 2017 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_ |
1754212670705238016 |