Y. Wanna, S. Pratontep, A. Wisitsoraat, A. Tuantranont
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Development of nanofibers composite Polyaniine/CNT fabricated by Electro spinning Technique for CO Gas Sensor
Conducting Polyaniline (PANI) doped Maleic acid (MA) blending with Polyvinyl alcohol (PVA) and Carbon nanotube (CNT) nanofiber has been fabricated by electrospun technique. Structural and morphological characterization has been carried out by means of SEM, XRD and TEM in order to correlate structural properties with gas sensing behavior. The sensors were tested for CO sensing at room temperature with CO concentrations in the range of 100-500 ppm. In comparisons to PANI prepared by solvent casting technique with no CNT inclusion, the sensitivity of the nanofiber composite was increased by more than two orders of magnitude and response/recovery times were reduced by more than the factor of 3. The results, therefore, suggest that the electro spun PANI/PVA composite of CNT in MA-doped. PANI is a promising method for achieving a conductive polymer gas sensor with good sensitivity, fast response, low-concentration detection and room-operating-temperature capability.
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