Transparent, highly dielectric poly(vinylidene fluoride) nanocomposite film homogeneously incorporating BaTiO3 nanoparticles with fluoroalkylsilane surface modifier

High-k Polymer Nanocomposites for Energy Storage Applications

“…Moreover, the molecular structure of the surface modifier must be given considerable attention, making sure it is similar to the polymer matrix; otherwise it will result in the formation of pores, voids, and cracks in the polymer nanocomposites. The problem of high leakage current and dielectric loss associated with the silane coupling agent is due to the unabsorbed residues species in the final system [40,41]. Niu et al [42] studied the relationship between the surface modifier structure and BT-PVDF nanocomposites for energy storage applications.…”

The surface modification of BaTiO3 and its effects on the microstructure and electrical properties of BaTiO3/silicone rubber composites

“…According to the literature , the dielectric constant, loss tangent, and other properties of nanocomposites are greatly influenced by the compatibility between the organic phase and inorganic phase, namely the phase interface has great influence on the performances of nanocomposites. As a practice, chemical surface modification of fillers has already been exploited in improving the interface defects and enhancing the dielectric performance of composites . Surface modifiers can suppress both nanoparticle agglomeration and void formation in the nanocomposite films, leading to a success in highly dielectric and refractive nanocomposite films .…”

Interface-Dominated Time-Dependent Behavior of Poled Poly(Vinylidene Fluoride–Trifluoroethylene)/Barium Titanate Composites

“…To obtain 0-3 composites with interesting piezoelectric properties, high volume fractions of ceramic particles, which have high surface energy, are introduced in a polymeric matrix with much lower surface energy, with consequent problems such as particle agglomeration and porosity [9,10]. As a very common approach for achieving better dispersion, and hence lower porosity and better dielectric and mechanical properties, coupling agents, including, e.g., silanes or phosphonic acids [11][12][13][14], are used to increase the compatibility between the ceramic particles and the matrix, by decreasing the surface energy of the particles, and in some cases creating bonds with the matrix. Silanes and phosphonic acids are commercially available bearing a wide range of functional groups on their non-hydrolyzable organic chain, as e.g., alkyl, amino, or fluorinated groups.…”