Enhanced pyroelectric and piezoelectric properties of PVDF – BaTiO<sub>3</sub> nanocomposites layered samples

Singh, Pramod Kumar; Gaur, M. S.; Johari, Dilip; Sagar, Rohan; Gupta, Akash; Sharma, Ashutosh; Singh, G.; Yadav, Mayank

doi:10.1080/00150193.2019.1658038

Cited by 12 publications

(8 citation statements)

References 21 publications

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“…The densities of foams were determined according to ASTM D792 Method by weighing the foam in air and water. The expansion ratio (

E_{r}

) of the foam was calculated using the following equation, 42

E_{r} goodbreak= \frac{ρ_{s}}{ρ_{f}} goodbreak\times 100 %,

where

ρ_{s}

is the solid sample's density, and

ρ_{f}

is the foam's density.…”

Section: Methodsmentioning

confidence: 99%

Achieving low‐thermal conductivity and high β phase in PVDF/PMMA blend foams via low‐pressure microcellular foaming

Weng

Ren

et al. 2022

J of Applied Polymer Sci

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Polyvinylidene fluoride (PVDF) foam exhibits wider applications than traditional foams such as polyethylene and polystyrene foams due to its good corrosion resistance, flame retardant and wide operating temperature range. However, PVDF is difficult to foam and rigorous operating conditions including high pressure and high temperature were unavoidably adopted to prepare PVDF foams. Herein, microcellular PVDF foam was successfully fabricated with the combination of adding polymethylmethacrylate (PMMA) and batch foaming at mild processing condition. Compared to the pure PVDF foam with a low‐expansion‐ratio of 1.1 times, the PVDF/PMMA (70/30) blend foam showed an expansion ratio as high as 20 times together with a small cell size of approximately 5 μm. Additionally, the prepared PVDF/PMMA blend foam exhibited a low‐thermal conductivity (0.039 w m−1 k−1) and high content of β‐phase crystal (95%), which shows promising application in areas like electronic devices, thermal insulation and packaging materials.

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“…The densities of foams were determined according to ASTM D792 Method by weighing the foam in air and water. The expansion ratio (

E_{r}

) of the foam was calculated using the following equation, 42

E_{r} goodbreak= \frac{ρ_{s}}{ρ_{f}} goodbreak\times 100 %,

where

ρ_{s}

is the solid sample's density, and

ρ_{f}

is the foam's density.…”

Section: Methodsmentioning

confidence: 99%

Achieving low‐thermal conductivity and high β phase in PVDF/PMMA blend foams via low‐pressure microcellular foaming

Weng

Ren

et al. 2022

J of Applied Polymer Sci

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“…25 A drastic improvement was overserved by incorporating BaTiO 3 nanoparticles into PVDF. 26 The triple-layer PVDF/BaTiO 3 nanocomposite possessed a pyroelectric co-efficient as high as 268.49 mC m À2 K À1 . Furthermore, a strontium barium niobate, Sr 0.3 Ba 0.7 -Nb 2 O 6 /polyurethane (PU), nanocomposite showed an extraordinary pyroelectric co-efficient of 380 mC m À2 K À1 .…”

Section: Materials Designmentioning

confidence: 99%

Envisioned strategy for an early intervention in virus-suspected patients through non-invasive piezo- and pyro-electric-based wearable sensors

Ghosh

Mandal

2021

J. Mater. Chem. A

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“…This amount of β phase in electrospun PVDF used in samples is obtained without any nanoparticles. 56 This high β phase without any nanoparticles, curing, and improvement is obtained because PVDF is electrospun in a strong electrical field. 57…”

Section: Cross-linking Study Of Nanofibersmentioning

confidence: 99%

Cold atmospheric plasma modification and electrical conductivity induction in gelatin/polyvinylidene fluoride nanofibers for neural tissue engineering

et al. 2022

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Background: This research follows some investigations through neural tissue engineering, including fabrication, surface treatment, and evaluation of novel self-stimuli conductive biocompatible and degradable nanocomposite scaffolds.Methods: Gelatin as a biobased material and polyvinylidene fluoride (PVDF) as a mechanical, electrical, and piezoelectric improvement agent were co-electrospun.In addition, polyaniline/graphene (PAG) nanoparticles were synthesized and added to gelatin solutions in different percentages to induce electrical conductivity. After obtaining optimum PAG percentage, cold atmospheric plasma (CAP) treatment was applied over the best samples by different plasma variable parameters. Finally, the biocompatibility of the scaffolds was analyzed and approved by in vitro tests using two different PC12 and C6 cell lines. In the present study the morphology, FTIR, dynamic light scattering, mechanical properties, wettability, contact angle tests, differential scanning calorimetric, rate of degradation, conductivity, biocompatibility, gene expression, DAPI staining, and cell proliferation were investigated. Results:The PAG percentage optimization results revealed fiber diameter reduction, conductivity enhancement, young's modulus improvement, hydrophilicity devaluation, water uptake decrement, and degradability reduction in electrospun nanofibers by increasing the PAG concentration. Furthermore, ATR-FTIR, FE-SEM, AFM, and contact angle tests revealed that helium CAP treatment improves scaffold characterizations for 90 s in duration time. Furthermore, the results of the MTT assay, FE-SEM, DAPI staining, and RT-PCR revealed that samples containing 2.5% w/w of PAG are the most biocompatible, and CAP treatment increases cell proliferation and improves neural gene expression in the differentiation medium.

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Enhanced pyroelectric and piezoelectric properties of PVDF – BaTiO₃ nanocomposites layered samples

Cited by 12 publications

References 21 publications

Achieving low‐thermal conductivity and high β phase in PVDF/PMMA blend foams via low‐pressure microcellular foaming

Achieving low‐thermal conductivity and high β phase in PVDF/PMMA blend foams via low‐pressure microcellular foaming

Envisioned strategy for an early intervention in virus-suspected patients through non-invasive piezo- and pyro-electric-based wearable sensors

Cold atmospheric plasma modification and electrical conductivity induction in gelatin/polyvinylidene fluoride nanofibers for neural tissue engineering

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Enhanced pyroelectric and piezoelectric properties of PVDF – BaTiO3 nanocomposites layered samples

Cited by 12 publications

References 21 publications

Achieving low‐thermal conductivity and high β phase in PVDF/PMMA blend foams via low‐pressure microcellular foaming

Achieving low‐thermal conductivity and high β phase in PVDF/PMMA blend foams via low‐pressure microcellular foaming

Envisioned strategy for an early intervention in virus-suspected patients through non-invasive piezo- and pyro-electric-based wearable sensors

Cold atmospheric plasma modification and electrical conductivity induction in gelatin/polyvinylidene fluoride nanofibers for neural tissue engineering

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Product

Resources

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Enhanced pyroelectric and piezoelectric properties of PVDF – BaTiO₃ nanocomposites layered samples