Preconcentration in gas or liquid phases using adsorbent thin films
Autor(a) principal: | |
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Data de Publicação: | 2006 |
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=S1516-14392006000100008 |
Resumo: | The possibility of preconcentration on microchannels for organic compounds in gas or liquid phases was evaluated. Microstructures with different geometries were mechanically machined using poly(methyl methacrylate) - PMMA as substrates and some cavities were covered with cellulose. The surfaces of the microchannels were modified by plasma deposition of hydrophilic or hydrophobic films using 2-propanol and hexamethyldisilazane (HMDS), respectively. Double layers of HMDS + 2-propanol were also used. Adsorption characterization was made by Quartz Crystal Measurements (QCM) technique using reactants in a large polarity range that showed the adsorption ability of the structures depends more on the films used than on the capillary phenomena. Cellulose modified by double layer film showed a high retention capacity for all gaseous compounds tested. However, structures without plasma deposition showed low retention capacity. Microchannels modified with double layers or 2-propanol plasma films showed higher retention than non-modified ones on gas or liquid phase. |
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Materials research (São Carlos. Online) |
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Preconcentration in gas or liquid phases using adsorbent thin filmspreconcentrationmicrochannelsmicrostructure and plasma polymerizationThe possibility of preconcentration on microchannels for organic compounds in gas or liquid phases was evaluated. Microstructures with different geometries were mechanically machined using poly(methyl methacrylate) - PMMA as substrates and some cavities were covered with cellulose. The surfaces of the microchannels were modified by plasma deposition of hydrophilic or hydrophobic films using 2-propanol and hexamethyldisilazane (HMDS), respectively. Double layers of HMDS + 2-propanol were also used. Adsorption characterization was made by Quartz Crystal Measurements (QCM) technique using reactants in a large polarity range that showed the adsorption ability of the structures depends more on the films used than on the capillary phenomena. Cellulose modified by double layer film showed a high retention capacity for all gaseous compounds tested. However, structures without plasma deposition showed low retention capacity. Microchannels modified with double layers or 2-propanol plasma films showed higher retention than non-modified ones on gas or liquid phase.ABM, ABC, ABPol2006-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000100008Materials Research v.9 n.1 2006reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392006000100008info:eu-repo/semantics/openAccessNascimento Filho,Antonio PereiraCarvalho,Alexsander Tressino deSilva,Maria Lúcia Pereira daDemarquette,Nicole Raymondeng2006-04-10T00:00:00Zoai:scielo:S1516-14392006000100008Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-04-10T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Preconcentration in gas or liquid phases using adsorbent thin films |
title |
Preconcentration in gas or liquid phases using adsorbent thin films |
spellingShingle |
Preconcentration in gas or liquid phases using adsorbent thin films Nascimento Filho,Antonio Pereira preconcentration microchannels microstructure and plasma polymerization |
title_short |
Preconcentration in gas or liquid phases using adsorbent thin films |
title_full |
Preconcentration in gas or liquid phases using adsorbent thin films |
title_fullStr |
Preconcentration in gas or liquid phases using adsorbent thin films |
title_full_unstemmed |
Preconcentration in gas or liquid phases using adsorbent thin films |
title_sort |
Preconcentration in gas or liquid phases using adsorbent thin films |
author |
Nascimento Filho,Antonio Pereira |
author_facet |
Nascimento Filho,Antonio Pereira Carvalho,Alexsander Tressino de Silva,Maria Lúcia Pereira da Demarquette,Nicole Raymond |
author_role |
author |
author2 |
Carvalho,Alexsander Tressino de Silva,Maria Lúcia Pereira da Demarquette,Nicole Raymond |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Nascimento Filho,Antonio Pereira Carvalho,Alexsander Tressino de Silva,Maria Lúcia Pereira da Demarquette,Nicole Raymond |
dc.subject.por.fl_str_mv |
preconcentration microchannels microstructure and plasma polymerization |
topic |
preconcentration microchannels microstructure and plasma polymerization |
description |
The possibility of preconcentration on microchannels for organic compounds in gas or liquid phases was evaluated. Microstructures with different geometries were mechanically machined using poly(methyl methacrylate) - PMMA as substrates and some cavities were covered with cellulose. The surfaces of the microchannels were modified by plasma deposition of hydrophilic or hydrophobic films using 2-propanol and hexamethyldisilazane (HMDS), respectively. Double layers of HMDS + 2-propanol were also used. Adsorption characterization was made by Quartz Crystal Measurements (QCM) technique using reactants in a large polarity range that showed the adsorption ability of the structures depends more on the films used than on the capillary phenomena. Cellulose modified by double layer film showed a high retention capacity for all gaseous compounds tested. However, structures without plasma deposition showed low retention capacity. Microchannels modified with double layers or 2-propanol plasma films showed higher retention than non-modified ones on gas or liquid phase. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-03-01 |
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=S1516-14392006000100008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000100008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392006000100008 |
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.9 n.1 2006 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_ |
1754212658161123328 |