Preconcentration in gas or liquid phases using adsorbent thin films
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 t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2006-03-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000100008 |
| _version_ | 1818439121572462592 |
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| author | Antonio Pereira Nascimento Filho Alexsander Tressino de Carvalho Maria Lúcia Pereira da Silva Nicole Raymond Demarquette |
| author_facet | Antonio Pereira Nascimento Filho Alexsander Tressino de Carvalho Maria Lúcia Pereira da Silva Nicole Raymond Demarquette |
| author_sort | Antonio Pereira Nascimento Filho |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-14T17:51:26Z |
| format | Article |
| id | doaj.art-3580ab5a93e54e94b32e20f9f87898fd |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-14T17:51:26Z |
| publishDate | 2006-03-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-3580ab5a93e54e94b32e20f9f87898fd2022-12-21T22:52:38ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392006-03-0191334010.1590/S1516-14392006000100008Preconcentration in gas or liquid phases using adsorbent thin filmsAntonio Pereira Nascimento FilhoAlexsander Tressino de CarvalhoMaria Lúcia Pereira da SilvaNicole Raymond DemarquetteThe 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000100008preconcentrationmicrochannelsmicrostructure and plasma polymerization |
| spellingShingle | Antonio Pereira Nascimento Filho Alexsander Tressino de Carvalho Maria Lúcia Pereira da Silva Nicole Raymond Demarquette Preconcentration in gas or liquid phases using adsorbent thin films Materials Research preconcentration microchannels microstructure and plasma polymerization |
| title | 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_short | Preconcentration in gas or liquid phases using adsorbent thin films |
| title_sort | preconcentration in gas or liquid phases using adsorbent thin films |
| topic | preconcentration microchannels microstructure and plasma polymerization |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000100008 |
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