Meningkatkan Sifat Listrik Material Sensor Gas Etanol Dengan Meningkatkan Waktu Getaran Ultrasonik dan Kelembaban

Syukri, Yunus (2024) Meningkatkan Sifat Listrik Material Sensor Gas Etanol Dengan Meningkatkan Waktu Getaran Ultrasonik dan Kelembaban. Other thesis, Universitas Andalas.

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Abstract

This research aimed to improve the electrical properties and observe the effect of humidity on ethanol gas sensors made from polyvinyl alcohol and polypyrrole materials. Mix the materials in a magnetic stirrer, then put them in a petridish for ultrasonication. We carried out ultrasonication for variations of 0, 2, 4 minutes, and 8 minutes. The researchers resisted the nanocomposite material obtained with RH variations of ±50%, ±75%, and ±95%. After that, the electrical properties are measured (conductivity, current density, and specific capacitance). Conductivity measurements use the four-point probe method. Measurement of current density and capacitance using cyclic voltammetry. The results of measurements using this ultrasonication variation from WUB to UB2 showed a decrease in conductivity of 15.87%, an increase in current density of 130.34%, specific capacitance of 85.27%; from UB2 to UB4 get an increase in conductivity of 37.20%, a decrease in current density of 94.96%, a specific capacitance of 95.95%; decrease from UB4 to UB8 conductivity 17.69%, current density 81.32%, specific capacitance 78.87%. Measurement results with humidity variations increased from RH50% to RH75%, conductivity 82.54%, current density 23.54%, specific capacitance 35.03%; from RH75% to RH95% increases conductivity 354.54%, current density 952.56%, specific capacitance 862.22%. We carried out characteristic testing using FTIR, XRD, and SEM

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