Fabrication and dielectric properties of oriented polyvinylidene fluoride nanocomposites incorporated with graphene nanosheets

Shang, Jiwu; Zhang, Yihe; Yu, Li; Shen, Bo; Lv, Fengzhu; Chu, Paul K.

doi:10.1016/j.matchemphys.2012.03.082

Cited by 100 publications

(57 citation statements)

References 50 publications

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“…[2] This is a typical behavior for disordered solids and is believed to happen due to the charge transport via hopping. [2,17] For dielectric tangent loss (Fig. 2(c)), the experimental data depict an initial decrease at lower frequency region and increase when the frequency ascends.…”

Section: Various Loaded Gns/tpu Composites At Roommentioning

confidence: 97%

“…This increase in the dielectric constant for 0.55% vol GNS at lower frequencies is credited to the Maxwell-Wagnar-Sillars interfacial polarization, as there is a marked difference in the conductivity of the filler GNS and the host TPU. [17] Figure 2(b) shows the AC conductivity response of GNS/TPU composites as a function of frequency. It clearly confirms the linear relationship between these two parameters.…”

Section: Various Loaded Gns/tpu Composites At Roommentioning

confidence: 99%

“…[16] Graphene has been added to various polymers and reported for a low percolation threshold in most of these polymers. [17] Recently, we have studied a very low percolation threshold (0.55%vol GNS) for graphene nanosheets (GNS) dispersed in thermoplastic polyurethane (TPU) nanocomposites to be published elsewhere. The formation of conducting network in nanocomposites at such low volume fractions is attributed to various reasons like: (1) large surface-to-volume ratio, (2) morphology, (3) dimensions, and (4) dispersion of High aspect ratio graphene nanosheets (GNS), prepared via liquid exfoliation, are homogeneously dispersed in thermoplastic polyurethane (TPU).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dielectric spectroscopy of high aspect ratio graphene-polyurethane nanocomposites

Jan

Habib

Abbassi

et al. 2015

Electron. Mater. Lett.

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Section: Various Loaded Gns/tpu Composites At Roommentioning

confidence: 97%

Section: Various Loaded Gns/tpu Composites At Roommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric spectroscopy of high aspect ratio graphene-polyurethane nanocomposites

Jan

Habib

Abbassi

et al. 2015

Electron. Mater. Lett.

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“…3. It is clear that the e 0 of the blend is more than that of pure PVDF which reported by e 0 = 8.3 in other work [17]. The increase in e 0 of nanocomposites is due to the increase in polar b-phase content in PVDF.…”

Section: Dielectric Studiesmentioning

confidence: 57%

The effect of nanographite addition on the physical properties of poly(vinylidene fluoride)/hydroxypropyl cellulose blend

Abdelaziz

Abdelrazek

2014

J Mater Sci: Mater Electron

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In this study, polymeric films of poly(vinylidene fluoride) (PVDF)/hydroxypropyl cellulose (HPC) blend filled with various graphite-nanoparticles (GNP) contents were prepared via solvent-mixing technique. The compatibility between PVDF and HPC polymers was studied. The variations in structure, dielectric and thermal properties were investigated over the frequency range (20 Hz-3 MHz) and temperature range (20-110°C). The X-ray diffraction and differential scanning calorimetry results reveal that the crystallinity of PVDF was affected by the presence of HPC and GNP. The dielectric results reveal that the great enhancement of dielectric constant (e 0 ) and ac conductivity (r ac ) were observed. The dielectric properties were explained in terms of the dielectric polarization mechanism. Both HPC and GNP additions enhance the e 0 of PVDF due to the formation of b-phase polymorph and the interface effect between the GNP and blend matrix. The improvement of the thermal stability was observed due to the regular arrangement of the side chains. The easy processing, high dielectric constant, low tangent loss and high thermal stability of the composites make the composites attractive for practical applications in embedded capacitors.

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“…Недавние исследования показывают, что введение графена в сегнетоэлектрическую полимерную матрицу и его пространственное распределение в ней дает композит с сегнетоэлектрическими и механическими свойствами, отличающимися от характеристик чистой матрицы PVDF [32][33][34][35]. Если графен равномерно диспергирован в полимерной матрице, диэлектрическая проницаемость полученного композита, вероятно, будет больше, чем у чистого PVDF [36].…”

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Computer Aided Molecular Modeling of the Piezoelectric Properties of Ferroelectric Composites on the Base of Polyvinylidene Fluoride with Graphene and Graphene Oxide

Bystrova¹

2017

Math.Biol.Bioinf.

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Molecular modeling of ferroelectric composites containing polyvinylidene fluoride (PVDF), graphene (G) and/or graphene oxide (GO), was performed using the semi-empirical quantum approximation PM3 in the HyperChem software package. The piezoelectric properties of the composites were analyzed and compared with the experimental data obtained for thin films containing poly(vinylidene-fluoride-trifluoroethylene) with graphene oxide (P (VDF-TrFE)/GO). A qualitative agreement was obtained between the simulation results and the experimental measurements of the piezoelectric coefficient, its decrease in the presence of G or GO was revealed. When models containing one or more layers of graphene with 54 carbon atoms were investigated, it was found that the average piezoelectric coefficient was reduced to -9.8 pm/V for the one-sided PVDF/G model and to -18.98 pm/V for the two-sided sandwich model G/PVDF/G in compare with the calculated piezoelectric coefficient for pure PVDF (-42.2 pm/V). After computer modeling for models incorporating one or more layers of 96 carbon atoms in the oxide graphene, it was found that the piezoelectric coefficient was reduced to a value of -14.6 pm/V for a one-sided PVDF / GO model and to a value of -29.8 pm/V for a two-sided sandwich model GO/ PVDF/GO compared to the piezoelectric coefficient for pure PVDF.

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Fabrication and dielectric properties of oriented polyvinylidene fluoride nanocomposites incorporated with graphene nanosheets

Cited by 100 publications

References 50 publications

Dielectric spectroscopy of high aspect ratio graphene-polyurethane nanocomposites

Dielectric spectroscopy of high aspect ratio graphene-polyurethane nanocomposites

The effect of nanographite addition on the physical properties of poly(vinylidene fluoride)/hydroxypropyl cellulose blend

Computer Aided Molecular Modeling of the Piezoelectric Properties of Ferroelectric Composites on the Base of Polyvinylidene Fluoride with Graphene and Graphene Oxide

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