Mechanical properties of ceramic-polymer nanocomposites

Abstract

Nano crystalline powders of Barium Sodium Niobate (BNN) with the composition Ba3–2x Na4+x R Nb10 O30 with (R stands for rare earth = 0, x = 0) have been prepared by conventional ceramic technique. Barium Sodium Niobate can form a wide range of solid solutions, incorporating rare earth and alkali, alkaline earth elements with different compositions. The powder belonged to tungsten bronze type structure with tetragonal symmetry and lattice constants a = b = 1.2421 nm and c = 0.3903 nm. XRD (X-ray Diffraction) SEM (Scanning Electron Microscope) and AFM (Atomic Force Microscope) studies revealed that the particle size is in the nanometer range. Composites are prepared by mixing powders of BNN with polystyrene at different volume fractions of the BNN. Melt mixing technique is carried out in a Brabender Plasticoder at a rotor speed of 60 rpm (rotations per minute) for composite preparation. Mechanical properties such as stress-strain behavior, Young’s modulus, tensile strength, strain at break etc. are evaluated. Addition of filler enhances the mechanical properties of the polymer such as Young’s modulus and tensile strength. The composites showed the trend of perfect adhesion between the filler and the polymer. The filler particles are distributed relatively uniform fashion in all composites and the particles are almost spherical in shape with irregular boundaries. To explore more carefully the degree of interfacial adhesion between the two phases, the results are analyzed by using models featuring adhesion parameter. The experimental results are compared with theoretical predictions

Barium titanate/polyester resin nanocomposites: Development, structure-properties relationship and energy storage capability

“…The latter is related to the brittle nature of the ceramic filler, and to the possibility that distributed ceramic particles could act as stress raisers. Ideally, mechanically robust and processable at ambient temperature, tiny high-k materials could be incorporated within suitable polymers to form composites that combine desired properties of both components [14][15][16]. Ceramic/polymer nanocomposites should retain advantages emanating from the reinforcing phase, such as high dielectric permittivity, excellent thermal stability and high stiffness in compression, and the polymer matrix, such as low density, flexibility, facile processability, and high dielectric breakdown strength [17].…”

Atomic Force Microscopy, thermal, viscoelastic and mechanical properties of HDPE/CaCO3 nanocomposites

“…Table 3 shows the calculated D n , D w , D v and PDI. The calculated PDI values for both samples (I3 and B3) are less than 1.2 which indicates good particle size distribution and dispersion of CaCO 3 nanofiller in the HDPE matrix [30,31]. Apparently, PDI value of sample B3 slightly lower than that of I3.…”

“…1 The 3D atomic force micrographs of HDPE/CaCO 3 nanocomposites; I3 (left) and B3 (right) at different scan size; 2×2 μm (top) and 600×600 nm (below) and interparticle distance (ID) in matrix-filler morphology [28][29][30].…”

“…Whereas, the polydispersity index (PDI) which measure the particle size (diameter) distribution of the nanoparticles quantitatively is given by Eq. (6) [30]. Whereas for interparticle distance (ID) is calculated from Eq.…”

Improved electrical properties of Fe nanofiller impregnated PEO + PVP:Li+ blended polymer electrolytes for lithium battery applications

“…Moreover, polymer composites can be made stronger, stiffer, and electronically conductive by the incorporation of various additives like nanofillers. Most of these modifications are made by the addition of inorganic nanofillers to the polymers or polymer composites [6]. These synthesized nanocomposite polymer electrolytes could possess enhanced ionic conductivity and improved thermal properties also [7].…”