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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1226| MODELING AND EXPERIMENTAL TESTING OF THE EFFECT OF SOLVENT ABSORPTION ON THE ELECTRIC PROPERTIES OF SBR/CB CHEMICAL SENSORS | |
| IGNACIO MARTIN RIGOBERTO IBARRA GOMEZ | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Absortion of electricity | |
| number of chemical sensors are designed employing polymeric matrices filled with carbon particles (Carbon black, graphite or even carbon nanotubes). These matrices may be single polymers [1-4,] or blends [5]. These sensors work on the basis of a change on their electric properties when they come in contact with a specific substance. Their electric properties are in general dictated by the electric percolation of the carbon particles into the composite. When the carbon/polymer composites come into contact with a substance that is chemically compatible with the polymeric matrix, its conductivity gradually decreases with the exposure to this substance. This process is associated to a change in the volume of the polymer matrix caused by the absorption and diffusion of the solvent, which causes a reduction of the carbon particles volumetric fraction relative to the non-conductive material (polymer matrix plus organic solvents). This reduction results in an increase of the distance between carbon clusters and the subsequent breaking of the percolative chains, with the associated decrease in the composite’s conductivity. | |
| 2006 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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| Fichero | Tamaño | Formato | |
|---|---|---|---|
| Publ Soc Polim Mex Saltillo 2006 SPM06-075.pdf | 1.36 MB | Adobe PDF | Visualizar/Abrir |