Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Abstract

This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, and they increase with the concentrations of PbO2 nanoparticles. The ac electrical conductivity of (PVA–PAA–PbO2) nanocomposites increases with the frequency and the concentrations of PbO2 nanoparticles. The dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites also increases with the concentrations of PbO2 nanoparticles. The application of pressure-sensitive nanocomposites has been examined in the pressure interval (60–200) bar. The results showed that the electrical resistance of (PVA–PAA–PbO2) pressure-sensitive nanocomposites decreases, as the compressive stress increases. The (PVA–PAA–PbO2) nanocomposites have high sensitivity to pressure.

Analysis of Structural, Electrical and Electronic Properties of (Polymer Nanocomposites/ Silicon Carbide) For Antibacterial Application

“…The activation energy of (PVA-MgO-SiC),nanocomposites have high values for (PVA-MgO) nanocomposites, this is connected to the existence of free ions in the polymer. Because of the impact of space charge and creates local energy levels in the forbidden energy, [25][26][27][28], the activation energy of D.C electrical conductivity for nanocomposites decreases with increasing concentration of (SiC) nanoparticles,(as indicated in Fig.,6).…”

Fabrication Polyvinyl alcohol - Poly-Acrylic acid/ Niobium Carbide New Bio-Films for Antibacterial Applications

“…Nanocomposites materials have properties combine the properties of the filler and matrix. The new material has applications in fields: antibacterial [6][7][8][9][10][11], humidity sensors [12][13][14][15][16][17], pressure sensors and piezoelectric [18][19][20][21][22], radiation shielding [23][24][25] and thermal energy storage and release [26][27][28][29]. Niobium carbide is type of transition metals carbides which has unique properties resembling with metal and ceramic constituents and used in many technological applications due to their high strength, durability [30].…”

Synthesis of Biopolymer Blend- Metal Nitride Nanoparticles for Antibacterial Activity against E. coli

“…Titanium nitride nanoparticles exhibit novel electronic, optical and mechanical properties such as high melting points and low sintering tendencies are beneficial for applications in high temperature catalysis [6]. Nanocomposites have unique properties that make them suitable for many different medical, industrial and environmental applications in fields: thermal energy storage and release [7][8][9], antibacterial [10][11][12][13][14][15], humidity sensors [16][17][18][19][20], pressure sensors and piezoelectric [21][22][23][24][25][26] and radiation shielding [27][28][29][30]. This work deals with synthesis of biofilms from biopolymer blend-metal nitride nanoparticles for antibacterial activity against E. coli.…”