Fabrication and dielectric properties of advanced high permittivity polyaniline/poly(vinylidene fluoride) nanohybrid films with high energy storage density

Yuan, Jinkai; Dang, Zhi‐Min; Yao, Sheng‐Hong; Zha, Jun‐Wei; Zhou, Tao; Li, Shengtao; Bai, Jinbo

doi:10.1039/b923590f

Cited by 190 publications

(133 citation statements)

References 31 publications

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“…Generally, the α-phase of PVDF has strong peaks at 2θ = 17.6°, 18.7°and 20°, assigned respectively to the reflections of (100), (020) and (110) planes [26,45], along with weak peaks at 26°and 36° [46]. In addition, a well defined crystalline peak centered at 2θ = 20°, corresponding to the sum of the diffractions of planes (110) and (200) characteristic of the β-phase [26,47]. However, it is difficult to recognize the β-phase from the α-phase, because they have a common peak around 20° [26,48].…”

Section: Resultsmentioning

confidence: 99%

Modification on crystallization of poly(vinylidene fluoride) (PVDF) by solvent extraction of poly(methyl methacrylate) (PMMA) in PVDF/PMMA blends

Sun

Zhao

et al. 2011

Front. Mater. Sci.

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The crystallization modification of poly(vinylidene fluoride) (PVDF) was investigated for the blend films of PVDF and poly(methyl methacrylate) (PMMA). The mass crystallinity (χ c ) and further, the β-phase content (F (β) ) of PVDF, were studied for the asprepared blend films with different mass ratios. In addition, the variations of χ c and F (β) were systematically probed once the PMMA component was removed from the related blend systems. DSC, FTIR and XRD measurements all indicated that 1) χ c , F (β) and even the content of α-phase (F (α) ) decreased with the addition of PMMA; 2) with the extraction of PMMA, both χ c and F (β) increased while F (α) decreased. It is worth noting that the increase of χ c and F (β) depended on the relative amount of extracted PMMA (E PMMA ), i.e., the more PMMA was removed, the more χ c and F (β) increased. These results reveal the hindrance effect from the PMMA constituent to the crystallization of PVDF, and consequently, this restriction would be released when the PMMA was extracted.

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Section: Resultsmentioning

confidence: 99%

Modification on crystallization of poly(vinylidene fluoride) (PVDF) by solvent extraction of poly(methyl methacrylate) (PMMA) in PVDF/PMMA blends

Sun

Zhao

et al. 2011

Front. Mater. Sci.

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“…The incorporation of ZnO nanorods would induce large interfacial areas in composites which may result in a higher degree of interfacial polarization. On the other hand, the polarization and dielectric properties of the PVDF based ferroelectric polymers originate from their crystalline domain and the β phase exhibits piezoelectric and pyroelectric properties [21][22][23][24][25] , so it is reasonable to deduce that the formation of β phase do contribute to the enhancement of dielectric constant. And the decrease rate of the dielectric constant here is not remarkable.…”

Section: Dielectric Properties Of P(vdf-hfp) and Its Nanocompositesmentioning

confidence: 99%

Crystal structure transformation and dielectric properties of polymer composites incorporating zinc oxide nanorods

Dang

et al. 2013

Macromol. Res.

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Abstract.Zinc oxide (ZnO) nanorods were synthesized using a modified wet chemical method. Poly(vinylidene fluoride-co-hexafluoropropylene), P(VDF-HFP), nanocomposites with different ZnO nanorods loadings were prepared via a solution blend route. Field emission scanning electron microscopic (FESEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) were used to investigate the structure and morphology of the nanocomposites. XRD and FT-IR data indicate that the incorporation of ZnO nanorods promote the crystalline structure transformation of P(VDF-HFP). As the content of ZnO nanorods increases, the β phase structure increases while the α phase decreases. In addition, the dielectric properties of the P(VDF-HFP) and its composites were systematically studied.

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“…It can be found that only a little increment in the dielectric permittivity occurred when f GNS-Fe3O4 < 9.41 vol.%, which was followed by a sudden giant increase in the dielectric permittivity when f GNS-Fe3O4 = 9.41 vol.%. This phenomenon can be explained by the percolation theory [32][33][34][35][36][37][38][39]. The dielectric permittivity of the GNS-Fe 3 O 4 /sPS composites near the percolation threshold can be described by Eq.…”

Section: Resultsmentioning

confidence: 97%

Fabrication of graphene nanosheet (GNS)–Fe3O4 hybrids and GNS–Fe3O4/syndiotactic polystyrene composites with high dielectric permittivity

Lam

et al. 2013

Carbon

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Fabrication and dielectric properties of advanced high permittivity polyaniline/poly(vinylidene fluoride) nanohybrid films with high energy storage density

Cited by 190 publications

References 31 publications

Modification on crystallization of poly(vinylidene fluoride) (PVDF) by solvent extraction of poly(methyl methacrylate) (PMMA) in PVDF/PMMA blends

Modification on crystallization of poly(vinylidene fluoride) (PVDF) by solvent extraction of poly(methyl methacrylate) (PMMA) in PVDF/PMMA blends

Crystal structure transformation and dielectric properties of polymer composites incorporating zinc oxide nanorods

Fabrication of graphene nanosheet (GNS)–Fe3O4 hybrids and GNS–Fe3O4/syndiotactic polystyrene composites with high dielectric permittivity

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