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Year 2021 Volume 19, Issue 4 |
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Issues/2021/vol. 19 /Issue 4 |
Ahmed Hashim and Zinah Sattar Hamad
«Humidity Sensing Performance of Polymer Blend–Titanium Nitride Nanocomposites: Structural, Electrical, and Optical Properties
»
0893–0903 (2021)
PACS numbers: 07.07.Df, 68.37.Hk, 72.80.Tm, 78.20.Ci, 78.67.Sc, 82.35.Np, 92.60.jk
Synthesis of new nanocomposite films of both the PVA–PAA blend and the PVA–PAA blend doped by titanium nitride nanoparticles is investigated for the sake of humidity sensors with low cost, light weight, flexibility and high sensitivity. The structural, electrical, and optical properties of PVA–PAA–TiN nanocomposites are studied. The results concerning electrical properties of PVA–PAA–TiN nanocomposites show that the electrical conductivity of PVA–PAA blend increases from 4.3·10-11 S/cm to 6.1·10-9 S/cm, if the titanium-nitride nanoparticles’ concentration increases to 6 wt.%. In addition, the electrical conductivity of all samples of PVA–PAA–TiN nanocomposites increases by one order, when temperature increases from 50°C to 80°C. The activation energy for PVA–PAA blend decreases from 0.57 eV to 0.29 eV, when titanium-nitride nanoparticles’ concentration increases. The optical-properties’ results show that the transmittance of PVA–PAA blend decreases (to 83.5%) with increasing the titanium-nitride nanoparticles’ concentration. The results concerning PVA–PAA–TiN-nanocomposites’ applications for the sake of humidity sensors show that the PVA–PAA–TiN nanocomposites have high sensitivity for relative humidity.
Key words: humidity sensors, nanocomposites, titanium nitride, conductivity, transmittance
https://doi.org/10.15407/nnn.19.04.893
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