Clay nanocomposites based on poly(vinylidene fluoride-co-hexafluoropropylene): Structure and properties

Abstract

The introduction of organically modified clays to poly(vinylidene fluoride-cohexafluoropropylene) matrix promotes an α to β transformation of the crystalline phase in a manner that critically depends upon the nature of the clay surface modifier. In addition, the presence of nanoclay facilitates an energy dissipation mechanism that gives rise to extensive enhancements in mechanical toughness. At ambient and elevated temperatures the dielectric permittivity of nanocomposites dramatically increases compared to the neat polymer. The rheological, mechanical and dielectric properties of hybrids directly reflect the morphological and structural changes induced by clays.2

Non-toxic poly(ethylene terephthalate)/clay nanocomposites with enhanced barrier properties

“…The TEM images reveal a remarkable high level of clay dispersion within the matrix, rarely achieved for melt processed PET nanocomposites. Crystallization studies are crucial in understanding the macroscopic properties of nanocomposites (vide infra) given that inclusion of inorganic particles in polymeric matrices can induce diverse effects such as heterogeneous nucleation [31,32], suppression of crystal growth [33], and preferential development of a certain crystalline phase at the expense of other phases [34,35]. In agreement with previous studies on PET/clay systems [26,27,36] the DSC curves shown in Fig.…”

Achieving significantly enhanced dielectric performance of reduced graphene oxide/polymer composite by covalent modification of graphene oxide surface

“…Silicon wafers covered by epoxy silanes were obtained by immersing in a solution was obtained in a similar manner but the process was conducted at room temperature. (3) [Si]-PEI-N-GO was obtained in a similar manner as (2) but without ultrasonic cleaning process. Thermogravimetric (TG) analysis was conducted on a TA Q500 at a heating rate of 10 ºC/min in a nitrogen atmosphere.…”

“…Polymeric flexible composite films with high dielectric constants and low dielectric losses have attracted intense research attention due to their potential applications in artificial muscles and skins, charge-storage devices, and flexible electronics [1][2][3][4][5]. The fabrication of flexible dielectric films using polymers and electric conductive fillers has proven to be a promising strategy in producing films with advantageous dielectric properties [5][6][7][8][9][10][11][12].…”

Enhanced β-crystalline phase in poly(vinylidene fluoride) films by polydopamine-coated BaTiO3 nanoparticles

“…To this end, some effective methods have emerged, including uniaxial or biaxial drawing [4], film-casting via polar solvents [5], electrospinning [6], quenching and poling of the film [7] and rapid thermal treatment [8], etc. In addition, adding nanofillers, such as barium titanate ceramic filler, nanoclay, or ferrite nanoparticles into the PVDF matrix, have attracted most attentions for its simplicity and effectiveness [6,[9][10][11][12]. In particularly, the addition of magnetic nanoparticles bring added value to the use of PVDF nanocomposites, which has been attracting an increased interest due to its innovative potential applications in data storage, switching, magnetic sensors, transducers and resonators [1], etc.…”