PZT / P(VDF-HFP) 0&amp;#x2013;3 composites: Preparation, electrical poling and piezoelectric properties

Arlt, Kristin; Wegener, Michael

doi:10.1109/ise.2008.4814007

Cited by 1 publication

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“…However, the potential application of these materials is still limited because of the large difference in dielectric properties between the polymer and fillers, which limits the enhancement of properties. Second, to improve the dielectric properties, the addition of conducting foreign fillers as a third phase can enhance the properties of the polymer composites consorting to percolation theory. , Numerous studies of PVDF-based nanocomposites have been reported − because their easy processing, nontoxic nature, chemical/heat resistance, and hydrophobic nature make them attractive for the manufacturing of electronic devices . Despite these advantages, the addition of fillers into the polymer leads to the agglomeration of the fillers, and instability of the fillers in the polymer during processing can increase the dielectric losses. , In the literature, various fillers have been applied to study the dielectric properties of nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Charge Carriers on Radial Zinc Oxide and the Study of Their Stability and Dielectric Behavior in Poly(vinylidene fluoride)

Aepuru

Panda

2014

J. Phys. Chem. C

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Radial zinc oxide (ZnO) was prepared using a new user-friendly chemical process, and the surface was modified by adsorbing polyaniline (PANI) as a charge carrier. The modified ZnO (PZnO) was used to prepare poly(vinylidene fluoride) (PVDF)–PZnO nanocomposites with improved dielectric properties. The structural morphology of the fillers was examined using powder X-ray diffraction and then correlated with observations from high-resolution transmission electron microscopy. A new characterization technique was used to study the maximum adsorption limit by performing solvent relaxation nuclear magnetic resonance experiments, and the results suggested that a maximum of 10% PANI is adsorbed onto the ZnO. The adsorbed PANI acted as an interface and stabilized the ZnO in PVDF solution due to strong interactions between the matrix and fillers. An electron spin resonance (ESR) study was carried out to characterize the spin resonance of ZnO and PZnO. The adsorption of PANI onto ZnO generated charge carriers, and hence, under the influence of a magnetic field, the samples exhibited dissimilar resonance behavior. Dielectric studies of the PVDF–PZnO composites were performed, and the PVDF–ZnO composites and pure PVDF were compared over a wide range of frequencies (0.01 Hz–1 MHz) and temperatures (25–90 °C). The results suggest that the PVDF–7.5PZnO composite showed a significantly improved dielectric constant with a decrease in dielectric loss (0.2), most likely because the adsorption of PANI onto ZnO led to strong interactions between the matrix and fillers and enhanced the interfacial polarization in PVDF.

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