Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups
Adsorption isotherms of hexane and benzene were measured on silicas with chemically bonded polyfluoroalkyl groups and the thermodynamic characteristics of the adsorption of n-alkanes, benzene and alkylbenzenes on the same materials studied at zero coverage by gas chromatography (GC). The prepared po...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2001-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617011494187 |
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| author | K.B. Gurevich T.M. Roshchina N.K. Shonia L.M. Kustov A.V. Ivanov |
| author_facet | K.B. Gurevich T.M. Roshchina N.K. Shonia L.M. Kustov A.V. Ivanov |
| author_sort | K.B. Gurevich |
| collection | DOAJ |
| description | Adsorption isotherms of hexane and benzene were measured on silicas with chemically bonded polyfluoroalkyl groups and the thermodynamic characteristics of the adsorption of n-alkanes, benzene and alkylbenzenes on the same materials studied at zero coverage by gas chromatography (GC). The prepared polyfluoroalkylsilicas were also investigated by IR spectroscopy over the spectral range 6000–2000 cm −1 when it was shown that the residual SiOH groups on the silica surface do not take part in the adsorption process as the attached organic groups effectively screen them. The polyfluoroalkylsilicas exhibited an extremely low adsorption potential and high polarity relative to unmodified alkylsilicas. The specific surface areas of the chemically modified silicas could be evaluated by comparison of their GC entropy values with those calculated from an ideal two-dimensional gas model. |
| format | Article |
| id | doaj-art-347d3df7f0c944dfbcafb5751332ca27 |
| institution | DOAJ |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2001-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-347d3df7f0c944dfbcafb5751332ca272025-08-20T02:43:16ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382001-05-011910.1260/0263617011494187Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl GroupsK.B. Gurevich0T.M. Roshchina1N.K. Shonia2L.M. Kustov3A.V. Ivanov4 Laboratory of Adsorption & Chromatography, Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 119899 Moscow, Russia Laboratory of Adsorption & Chromatography, Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 119899 Moscow, Russia Laboratory of Adsorption & Chromatography, Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 119899 Moscow, Russia N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, 117334 Moscow, Russia N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, 117334 Moscow, RussiaAdsorption isotherms of hexane and benzene were measured on silicas with chemically bonded polyfluoroalkyl groups and the thermodynamic characteristics of the adsorption of n-alkanes, benzene and alkylbenzenes on the same materials studied at zero coverage by gas chromatography (GC). The prepared polyfluoroalkylsilicas were also investigated by IR spectroscopy over the spectral range 6000–2000 cm −1 when it was shown that the residual SiOH groups on the silica surface do not take part in the adsorption process as the attached organic groups effectively screen them. The polyfluoroalkylsilicas exhibited an extremely low adsorption potential and high polarity relative to unmodified alkylsilicas. The specific surface areas of the chemically modified silicas could be evaluated by comparison of their GC entropy values with those calculated from an ideal two-dimensional gas model.https://doi.org/10.1260/0263617011494187 |
| spellingShingle | K.B. Gurevich T.M. Roshchina N.K. Shonia L.M. Kustov A.V. Ivanov Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups Adsorption Science & Technology |
| title | Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups |
| title_full | Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups |
| title_fullStr | Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups |
| title_full_unstemmed | Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups |
| title_short | Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups |
| title_sort | surface properties of silicas with chemically bonded polyfluoroalkyl groups |
| url | https://doi.org/10.1260/0263617011494187 |
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