Numerical method to evaluate the influence of organic solvent absorption on the conductivity of polymeric composites

Modeling carbon black/polymer composite sensors

“…8 into Eq. 6, the vapor pressure of the analyte can be related to the volume fraction of the analyte in the composite and the interaction parameter by (9) Similar thermodynamic equations for systems with more than two components can be derived based on Flory theory [20]. For example, the equation of the analyte1/analyte2/ polymer ternary system has been derived and widely used [20,[23][24][25]].…”

“…Conductive polymer composite sensor arrays made from carbon black dispersed in various insulating polymers have been explored actively by Lewis and co-workers [1][2][3], Ho and coworkers [4][5][6] and others [7][8][9][10][11][12]. Since the response of this type of device is the change of resistance of the sensor, it is called a "chemiresistor".…”

Modeling and experimental testing of the effect of solvent absorption on the electric properties of styrene butadiene rubber/carbon black chemical sensors

“…For example, with this type of materials sensors that measure pressure [1,2], strain [3] and temperature [4][5][6][7][8] has been designed. Also a number of chemical sensors to detect; liquid leaks [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], vapors [25][26][27][28][29], gases [30][31][32][33][34], and even artificial noses [35][36][37][38][39][40] have been recently introduced. 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.…”

“…In the first part of this work [16], the influence of swelling by solvent absorption on the electrical properties of elastomers filled with carbon particles was theoretically studied and a model developed. The objective of the model was to relate the percolation theory with the solvent diffusion equation in amorphous polymers, in order to improve the performance of chemical sensors made with similar materials.…”

Fabrication and characterization of carbon nanoparticles for polymer based vapor sensors

“…The simplicity of signal transduction and the low material cost of the detectors make them attractive even as specific application single sensors, however, there are few published data on the subject [3][4][5][6]. Several reports have studied the dielectric response of carbon black filled polymer "bulk" composites [7,8].…”