Synthesis and Characterization of PVA/PANI Nanofiber as Active Material for Humidity Sensors
DOI:
https://doi.org/10.48048/tis.2024.7551Keywords:
Polyaniline (PANI), PVA, Electrospinning, Humidity sensorAbstract
PANI is a nanostructure conductive polymer that has been widely researched by making nanofibers using electrospinning, by adding PVA as a non-conductive material. In this research, we have successfully synthesized PVA/PANI nanofiber using the electrospinning method and applied it as a humidity sensor. The oxidation polymerization method was conducted to produce polyaniline (PANI) powder. PVA was used as a non-conductive polymer to carry PANI. PANI is blended with 10 % PVA to produce nanofiber PVA/PANI. The results of the synthesis of PVA/PANI nanofibers using the electrospinning method have been characterized by FTIR and EDX to identify the functional groups and elements of PVA/PANI. The FTIR results confirmed that for the PVA nanofiber samples, the type of polyvinyl alcohol bond has been identified according to the reference. The EDX results show the elements C, O and N. The element nitrogen (N) is the characteristic element of polyaniline (C6H5(NH)2)n. The optical Microscope and Scanning Electron Microscope show that the electrospinning method has succeeded in synthesizing PVA/PANI nanofibers with a fiber size of around 0.313 mm. The porosity of PVA/PANI is around 55 %, which is related to the ability of PVA/PANI sensitivity to detect humidity. These results are demonstrated by measurements using a Four-Point Probe (FPP), with the humidity value varying from 64 - 80 %. The results show that variations of PANI powder content improve the sensitivity performance of PVA/PANI nanofibers. This method can optimize PVA/PANI nanofiber as a humidity sensor, increase conductivity flexibility, make it easier and enhance the PANI to use as an active sensor.
HIGHLIGHTS
- The active material for the sensor is polyaniline-based.
- Polyaniline oxidation polymerization using a method with solid acid doping, which can increase the conductivity of polyaniline (PANI).
- The formation of PANI nanofibers increases the sensing activities’ effectiveness.
- Polyvinyl alcohol (PVA) is used as a carrier to facilitate the synthesis process by electrospinning.
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