The Influence of the Ceramic Nanoparticles on the Thermoplastic Polymers Matrix: Their Structural, Optical, and Conductive Properties

Abstract

This paper prepared composites under the free membranes form that are based on thermoplastic polymers of the type of polyurethane (TPU) and polyolefin (TPO), which are blended in the weight ratio of 2:1, and ceramic nanoparticles (CNs) such as BaSrTiO3 and SrTiO3. The structural, optical, and conductive properties of these new composite materials are reported. The X-ray diffraction studies highlight a cubic crystalline structure of these CNs. The main variations in the vibrational properties of the TPU:TPO blend induced by CNs consist of the following: (i) the increase in the intensity of the Raman line of 1616 cm−1; (ii) the down-shift of the IR band from 800 to 791 cm−1; (iii) the change of the ratio between the absorbance of IR bands localized in the spectral range 950–1200 cm−1; and (iv) the decrease in the absorbance of the IR band from 1221 cm−1. All these variations were correlated with a preferential adsorption of thermoplastic polymers on the CNs surface. A photoluminescence (PL) quenching process of thermoplastic polymers is demonstrated to occur in the presence of CNs. The anisotropic PL measurements have highlighted a change in the angle of the binding of the TPU:TPO blend, which varies from 23.7° to ≈49.3° and ≈53.4°, when the concentration of BaSrTiO3 and SrTiO3 CNs, respectively, is changed from 0 to 25 wt. %. Using dielectric spectroscopy, two mechanisms are invoked to take place in the case of the composites based on TPU:TPO blends and CNs, i.e., one regarding the type of the electrical conduction and another specifying the dielectric–dipolar relaxation processes.

Composite Materials Based on Iron Oxide Nanoparticles and Polyurethane for Improving the Quality of MRI

“…The dielectric characteristics of polymer composites doped with iron oxide nanoparticles are of interest in relation to the construction of certain devices with applications related to biomedical engineering, microelectronics, nanotechnologies, etc [57][58][59][60]. Thus, the influence of different iron oxide nanoparticle contents on the dielectric behaviour of pure and PU nanocomposites was measured by dielectric spectrometry.…”

Physicomechanical Properties of Carbon Nanotubes Reinforced Cementitious Concrete – A Review

“…In FGMs, the volume fractions of the base constituents through the thickness can be artificially designed to maximize the target performance. The structural and conductive characteristics of these new composite materials were reported by Smaranda and others [81] after they prepared composites in the free membrane form. Having been inspired by the idea of FGMs, Shen [74] and Ke et al [82], to suppress bending deformation and control vibration, presented a deliberate CNT distribution with CNTRCs throughout the thickness.…”

Investigation of Mechanical Behaviors of Functionally Graded CNT-Reinforced Composite Plates

“…In this study, a modified linear rule of mixtures in which the CNT efficiency parameters η j (j = 1, 2, 3) are introduced is employed. Based on this method, the equivalent elastic and shear moduli of the FG-CNTRC plate are calculated as follows [13]:…”

“…are introduced is employed. Based on this method, the equivalent elastic and shear moduli of the FG-CNTRC plate are calculated as follows [13]:…”

“…In FGMs, the volume fractions of the base constituents through the thickness can be artificially designed such that the target performance reaches its maximum. Smaranda et al [13] prepared composites under the free membrane form and reported the structural and conductive properties of these new composite materials. Motivated by the concept of FGMs, Shen [14] and Ke et al [15] presented a purposeful CNT distribution with CNTRCs through the thickness for the sake of bending deformation suppression and vibration control.…”