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2022

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vol. 20 /

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Ahmed Hashim and Ali Jassim
Novel Metal-Oxide-NPs-Doped Polymers: Structural and Dielectric Properties for Flexible Pressure Sensors
0177–0185 (2022)

PACS numbers: 07.07.Df, 77.22.Gm, 77.22.Jp, 77.84.Lf, 81.07.Pr, 81.16.-c, 82.35.Np

Biodegradable polymer blend–inorganic metal-oxide nanoparticles’ semi-conductor for novel pressure sensors with low cost, lightweight and good sensitivity is investigated. Biodegradable blend prepared from polyvinyl alcohol and starch with following weight percentage: polyvinyl alcohol (85 wt.% PVA) and starch (15 wt.% ST). The influence of lead-oxide nanoparticles’ concentration on the structural and dielectric properties of (PVA–ST) blend is studied. The dielectric properties of (PVA–ST–PbO₂) nanocomposites are studied in frequency range from 100 Hz to 5 MHz. The results show that the dielectric constant and dielectric loss of (PVA–ST–PbO₂) nanocomposites decrease with increasing of frequency of applied electric field. The A.C. electrical conductivity of (PVA–ST–PbO₂) nanocomposites increases with increase in frequency. The dielectric parameters of (PVA–ST) blend (dielectric constant, dielectric loss, and A.C. electrical conductivity) increase with increase in lead-oxide nanoparticles’ weight percentage. The nanocomposites are tested for pressure sensors. The experimental results show that the (PVA–ST–PbO₂) nanocomposites have high sensitivity for pressure, and the electrical resistance of nanocomposites decreases with increases in applied pressure.

Key words: metal oxide, polymer, biodegradable nanocomposite, electrical and dielectric properties, pressure sensor.

https://doi.org/10.15407/nnn.20.01.177

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