Understanding nucleation of the electroactive β-phase of poly(vinylidene fluoride) by nanostructures

Sebastián, María San; Larrea, Ane; Gonçalves, Ramiro; Alejo, Teresa; Vilas, José Luis; Sebastián, Víctor; Martins, P.; Lanceros‐Méndez, S.

doi:10.1039/c6ra24356h

Cited by 77 publications

(58 citation statements)

References 46 publications

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“…Actually, the presence of filler can considerably affect this nucleation step. Previous works have showed that the surface charge and the shape of fillers can induce strong interaction with PVDF chains mainly at CH 2 moiety . In our case, it is very difficult to decide about the sign of the charge carried by the MOFs crystal.…”

Section: Resultssupporting

confidence: 89%

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu₃(BTC)₂ Composite Membranes Prepared by In Situ Crystal Growth

Missaoui

Chaplais

Josien

et al. 2019

Polymer Engineering & Sci

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In this work, we present a simple and fast method for elaborating hybrid membranes by growing metal–organic framework crystals inside a polymer solution. The solution thus obtained was casted then annealed at 90°C for 5 h. This method was tested with poly(vinylidene fluoride) (PVDF) as a piezoelectric polymer and the Cu3(BTC)2, BTC = 1,3,5‐benzene tricarboxylate, as a filler. The characterization of the obtained membranes by attenuated total reflectance Fourier transform infrared spectroscopy and X‐ray diffraction showed the presence of the characteristic signatures of Cu3(BTC)2 and the β‐phase of PVDF. Moreover, scanning electron microscopy images reveal that the Cu3(BTC)2 crystallites have grown along the PVDF membranes. The effect of the filler on both thermal and mechanical properties of the membranes was also studied. POLYM. ENG. SCI., 60:464–473, 2020. © 2019 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 89%

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu₃(BTC)₂ Composite Membranes Prepared by In Situ Crystal Growth

Missaoui

Chaplais

Josien

et al. 2019

Polymer Engineering & Sci

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“…The role of shape anisotropy in nanocomposite of PVDF was recently reported where a rod-shaped nanoparticle of Fe 3 O 4 into PVDF matrix was found to be relatively more efficient in organizing the dipoles of PVDF into polar conformation than the spherical nanoparticle of Fe 3 O 4. 57 Our findings are in agreement with results obtained by Sebastian et al 57 The elemental composition of the surface of the multilayer was studied using EDS microscopy. The peak intensity in EDS spectra represents the local abundance of the chemical elements present in the sample.…”

Section: Surface Morphology and Elemental Analysis Of The Nanocomposisupporting

confidence: 90%

“…The role of shape anisotropy in nanocomposite of PVDF was recently reported where a rod‐shaped nanoparticle of Fe 3 O 4 into PVDF matrix was found to be relatively more efficient in organizing the dipoles of PVDF into polar conformation than the spherical nanoparticle of Fe 3 O 4. Our findings are in agreement with results obtained by Sebastian et al …”

Section: Resultsmentioning

confidence: 99%

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Kumar

Viswanath

2019

J of Applied Polymer Sci

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Engineering the surface morphology with optimized crystallinity is very crucial for practical applications such as energy storage, electromechanical devices, and self‐cleaning. Organic nanocomposites permit one to tune the dielectric properties by controlling the crystallinity and surface morphology. Here, we report our investigation on metallophthalocyanines of nickel and copper as an organic additive to poly(vinylidene fluoride) (PVDF) to modify the structural, optical, wetting, and electrical properties of the nanocomposite multilayers deposited using Langmuir‐Schaefer method. The incorporation of the metallophthalocyanines in the nanocomposite multilayers was confirmed from the signature Bragg peaks, and the fingerprint absorbance using grazing incidence X‐ray diffraction and Fourier transform infrared spectroscopy, respectively. Aggregation behavior of the metallophthalocyanines in the polar matrix of PVDF was studied using ultraviolet–visible spectroscopy. Surface morphological studies using field emission scanning electron microscopy on the nanocomposite multilayers show the presence of both spherical crystallites and rod‐like structures which depends upon the composition and nature of metal in metallophthalocyanine. The surface wettability of these multilayers was investigated using static and dynamic contact angle studies. A significant enhancement in the dielectric constant has been observed for both nanocomposites relative to the pristine multilayer of PVDF. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47818.

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“…The TGA plots of PVDF and PVDF composite nanofabrics are shown in Figure . In PVDF, the decomposition takes place by chain depropagation mechanism in which the CH and CF scission occurs and leads to the formation of HF in the presence of hydrogen and fluorine radicals . It was observed that the decomposition of composite nanofabrics started at low temperature compared to that of PVDF.…”

Section: Resultsmentioning

confidence: 99%

Effect of polarization switching on piezoelectric and dielectric performance of electrospun nanofabrics of poly(vinylidene fluoride)/Ca–Al LDH nanocomposite

Shamitha

Mahendran

Anandhan

2019

J of Applied Polymer Sci

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At present, highly flexible, durable, and lightweight piezoelectric nanogenerators with high‐power density and energy conversion efficiency are of great interest. The present study reports a new synthetic route for Ca–Al layered double hydroxide (LDH) nanosheets and incorporation of these two‐dimensional nanosheets as filler material into poly(vinylidene fluoride) (PVDF) to produce composite nanofabrics by electrospinning. The polymorphism, crystallinity, and the interaction between PVDF and LDH were studied by Fourier transform infrared spectroscopy, X‐ray diffraction, and differential scanning calorimetry techniques. The synergetic effect of PVDF–LDH interaction and in situ stretching due to electrospinning facilitates the nucleation of electroactive β phase up to 82.79%, which makes it a suitable material for piezoelectric‐based nanogenerators. The piezoelectric performance of PVDF/Ca–Al LDH composite nanofabrics was demonstrated by hand slapping and frequency‐dependent mechanical vibration mode, which delivered a maximum open circuit output voltage of 4.1 and 5.72 V, respectively. Moreover, the composite nanofabrics exhibited a high dielectric constant and low dielectric loss due to superior interfacial polarization at low‐frequency region with LDH loading, promising its potential applications in electronic devices. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48697.

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Understanding nucleation of the electroactive β-phase of poly(vinylidene fluoride) by nanostructures

Cited by 77 publications

References 46 publications

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu₃(BTC)₂ Composite Membranes Prepared by In Situ Crystal Growth

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu₃(BTC)₂ Composite Membranes Prepared by In Situ Crystal Growth

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Effect of polarization switching on piezoelectric and dielectric performance of electrospun nanofabrics of poly(vinylidene fluoride)/Ca–Al LDH nanocomposite

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Understanding nucleation of the electroactive β-phase of poly(vinylidene fluoride) by nanostructures

Cited by 77 publications

References 46 publications

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu3(BTC)2 Composite Membranes Prepared by In Situ Crystal Growth

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu3(BTC)2 Composite Membranes Prepared by In Situ Crystal Growth

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Effect of polarization switching on piezoelectric and dielectric performance of electrospun nanofabrics of poly(vinylidene fluoride)/Ca–Al LDH nanocomposite

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Product

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Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu₃(BTC)₂ Composite Membranes Prepared by In Situ Crystal Growth

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu₃(BTC)₂ Composite Membranes Prepared by In Situ Crystal Growth