Development of a new flexible nanogenerator from electrospun nanofabric based on PVDF/talc nanosheet composites

Herein, a flexible piezoelectric nanogenerator composed of electrospun talc/PVDF [poly(vinylidene fluoride)] nanocomposite fabrics has been developed. These nanocomposite fabrics demonstrated enhanced mechanical and piezoelectric properties compared with pristine PVDF nanofabrics. In particular, nan...

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Bibliographic Details
Published in:Soft matter 2020-06, Vol.16 (24), p.5679-5688
Main Authors: Shetty, Sawan, Mahendran, Arunjunairaj, Anandhan, S
Format: Article
Language:English
Subjects:
Beta phase
Calorimetry
Differential scanning calorimetry
Electric power generation
Electrospinning
Fabrics
Fluorides
Fourier transforms
Infrared spectroscopy
Motor task performance
Nanocomposites
Nanogenerators
Nanosheets
Open circuit voltage
Piezoelectricity
Polyvinylidene fluorides
Portable equipment
Talc
Textile composites
Vinylidene fluoride
Voltage
X-ray diffraction
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Summary:Herein, a flexible piezoelectric nanogenerator composed of electrospun talc/PVDF [poly(vinylidene fluoride)] nanocomposite fabrics has been developed. These nanocomposite fabrics demonstrated enhanced mechanical and piezoelectric properties compared with pristine PVDF nanofabrics. In particular, nanocomposite fabrics with 0.50 wt% talc yielded 89.6% of polar β-phase in the PVDF matrix, thereby augmenting its piezoelectric response. X-ray diffraction, Fourier transform infrared spectroscopy, and differential scanning calorimetry conclusively affirmed the promotion of polar β-phase in the talc/PVDF nanocomposite fabrics. The 0.50 wt% talc/PVDF nanocomposite fabric based nanogenerator produced an open-circuit voltage and power density of 9.1 V and 1.12 μW cm −2 , respectively, under repetitive finger tapping mode (under a load of 3.8 N). Furthermore, the nanogenerator was also subjected to frequency modulated-shaker mode, wherein an output voltage of 8.9 V was produced. Improved flexibility, mechanical robustness, and enhanced piezoelectric responsiveness of this nanogenerator could possibly pave the way for its use in portable self-powered devices. Nanosheets of the softest mineral talc are embedded in electrospun poly(vinylidene fluoride) fabric, and substantial piezoelectric response of this nanocomposite fabric is displayed.
ISSN:1744-683X
1744-6848
DOI:10.1039/d0sm00341g