Conducting polymers are one of the most attractive conducting polymers because of its high conductivity, good environmental stability, and a large variety of potential technological application. However, conducting polymers themselves possess some limitations such as relative poor conductivity and d...
Conducting polymers are one of the most attractive conducting polymers because of its high conductivity, good environmental stability, and a large variety of potential technological application. However, conducting polymers themselves possess some limitations such as relative poor conductivity and dielectric constant, and these intrinsic physical parameters are difficult to turn easily from insulating to conducting states through chemical processes. Therefore, in this study, I have studied the synthesis of conducting polypyrrole(PPy) and polyaniline(PANI) composites using surfactant template and biological template, and therefore studied their physico-chemical properties. For the PPy-surfactant composites, sulphonic acids such as ?-naphthalene sulfonic acid (NSA), camphor sulfonic acid (CSA), and dodecylbenzenesulfonic acid (DBSA) were used and the PPy was synthesized by in situ deposition techniques in an aqueous media using ammonium per sulfate (APS) as an initiator. The obtained composites were characterized by scanning electron microscopy (SEM), and the thermal behavior of these polymer composites was analyzed by thermo-gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The temperature-dependent (DC) conductivity of the obtained films shows a semiconducting behavior with a negative temperature coefficient of resistivity (TCR). The parameters such as density of states at the Fermi energy, hopping energy, and hopping distance were calculated for PPy, PPy-NSA, PPy-CSA, and PPy-DBSA films, and the data were compared. To demonstrate a simple method for preparing the microstructures of the polypyrrole (PPy) and the polyaniline (PANI) by a biological template, different concentration of Escherichia coli (E. coli) was used. Data obtained from SEM and TEM indicate that fiber, cone/sphere, and agglomerated fiber structures, whose dimensions vary from 0.5 to 1?m. The results yield structures with shapes that vary depending on the E. coli concentration. PPy structures are unlike PANI in that they demonstrate little or no interaction in the presence of E. coli. Morphological change of PPy was not so high comparing to that of PANI by the presence of E. coli.
Conducting polymers are one of the most attractive conducting polymers because of its high conductivity, good environmental stability, and a large variety of potential technological application. However, conducting polymers themselves possess some limitations such as relative poor conductivity and dielectric constant, and these intrinsic physical parameters are difficult to turn easily from insulating to conducting states through chemical processes. Therefore, in this study, I have studied the synthesis of conducting polypyrrole(PPy) and polyaniline(PANI) composites using surfactant template and biological template, and therefore studied their physico-chemical properties. For the PPy-surfactant composites, sulphonic acids such as ?-naphthalene sulfonic acid (NSA), camphor sulfonic acid (CSA), and dodecylbenzenesulfonic acid (DBSA) were used and the PPy was synthesized by in situ deposition techniques in an aqueous media using ammonium per sulfate (APS) as an initiator. The obtained composites were characterized by scanning electron microscopy (SEM), and the thermal behavior of these polymer composites was analyzed by thermo-gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The temperature-dependent (DC) conductivity of the obtained films shows a semiconducting behavior with a negative temperature coefficient of resistivity (TCR). The parameters such as density of states at the Fermi energy, hopping energy, and hopping distance were calculated for PPy, PPy-NSA, PPy-CSA, and PPy-DBSA films, and the data were compared. To demonstrate a simple method for preparing the microstructures of the polypyrrole (PPy) and the polyaniline (PANI) by a biological template, different concentration of Escherichia coli (E. coli) was used. Data obtained from SEM and TEM indicate that fiber, cone/sphere, and agglomerated fiber structures, whose dimensions vary from 0.5 to 1?m. The results yield structures with shapes that vary depending on the E. coli concentration. PPy structures are unlike PANI in that they demonstrate little or no interaction in the presence of E. coli. Morphological change of PPy was not so high comparing to that of PANI by the presence of E. coli.
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