PFM Characterization of PVDF Nanocomposite Films With Enhanced Piezoelectric Response

Fortunato, Marco; Bidsorkhi, Hossein Cheraghi; Chandraiahgari, Chandrakanth Reddy; Bellis, Giovanni De; Sarto, F.; Sarto, Maria Sabrina

doi:10.1109/tnano.2018.2833201

Cited by 27 publications

(29 citation statements)

References 25 publications

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“…In addition, Figure 10 shows

as a function of

[ 23 ]. As expected from FT-IR and XRPD data, we notice that when we dissolve the HMS into PVDF, the piezoelectric coefficient increases.…”

Section: Resultsmentioning

confidence: 99%

“…Neat PVDF films were prepared using the procedure described in [ 23 , 24 ]. Briefly, 5 wt % PVDF powder was dissolved in 20 mL of a solvent mixture consisting of DMF and acetone (1:1 v/v), chosen according to Hansen’s solubility parameters as a good combination to fully dissolve PVDF [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

“…FT-IR measurements were performed using the same setup described in our previous work [ 22 , 23 ]. FT-IR measurements were carried out in the 4000–600 cm −1 range with a resolution of 1 cm −1 .…”

Section: Methodsmentioning

confidence: 99%

“…In one case, we found a d 33 of GNP–PVDF nanocomposites limited to 5.2 pm/V. In a further study, we proposed two different GNP dispersion routes and the addition of ZnO NRs to PVDF as fillers [ 23 ], thus obtaining a d 33 of ~6.2 pm/V, with a fraction of the β -phase

below 64%.…”

Section: Introductionmentioning

confidence: 92%

“…The use of ZnO nanorods as fillers in PVDF nanocomposites has been also proposed [ 23 , 24 ], with the aim of exploiting the synergistic effect on the piezoresponse of piezoelectric ZnO nanostructures [ 25 , 26 ] and PVDF.…”

Section: Introductionmentioning

confidence: 99%

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Piezoelectric Effect and Electroactive Phase Nucleation in Self-Standing Films of Unpoled PVDF Nanocomposite Films

et al. 2018

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Novel polymer-based piezoelectric nanocomposites with enhanced electromechanical properties open new opportunities for the development of wearable energy harvesters and sensors. This paper investigates how the dissolution of different types of hexahydrate metal salts affects β-phase content and piezoelectric response (d33) at nano- and macroscales of polyvinylidene fluoride (PVDF) nanocomposite films. The strongest enhancement of the piezoresponse is observed in PVDF nanocomposites processed with Mg(NO3)2⋅6H2O. The increased piezoresponse is attributed to the synergistic effect of the dipole moment associated with the nucleation of the electroactive phase and with the electrostatic interaction between the CF2 group of PVDF and the dissolved salt through hydrogen bonding. The combination of nanofillers like graphene nanoplatelets or zinc oxide nanorods with the hexahydrate salt dissolution in PVDF results in a dramatic reduction of d33, because the nanofiller assumes a competitive role with respect to H-bond formation between PVDF and the dissolved metal salt. The measured peak value of d33 reaches the local value of 13.49 pm/V, with an average of 8.88 pm/V over an area of 1 cm2. The proposed selection of metal salt enables low-cost production of piezoelectric PVDF nanocomposite films, without electrical poling or mechanical stretching, offering new opportunities for the development of devices for energy harvesting and wearable sensors.

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“…In addition, Figure 10 shows

as a function of

[ 23 ]. As expected from FT-IR and XRPD data, we notice that when we dissolve the HMS into PVDF, the piezoelectric coefficient increases.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

below 64%.…”

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Piezoelectric Effect and Electroactive Phase Nucleation in Self-Standing Films of Unpoled PVDF Nanocomposite Films

et al. 2018

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Piezoelectric properties of noncovalently functionalized 2D nanomaterials incorporated poly(vinylidene fluoride) nanocomposites

Adaval,

Khurana,

Bhatt

et al. 2023

J of Applied Polymer Sci

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We report here for the first time the role of noncovalently functionalized 2D nanomaterials on the ferroelectric and piezoelectric behavior of poly(vinylidene fluoride) (PVDF) nanocomposites. Graphene oxide (GO), expanded graphite (EG) and hexagonal boron nitride (h‐BN) were noncovalently modified via Li‐salt of 6‐amino hexanoic acid (Li‐AHA), denoted as m‐GO, m‐EG and m‐BN, in order to de‐agglomerate and de‐stack them, which were subsequently incorporated into the PVDF matrix via solution mixing, followed by compression molding. Simultaneously, PVDF nanocomposites with unmodified 0.08 wt% of 2D nanomaterials were also prepared using the same methodology. PVDF/m‐BN nanocomposite showed a higher extent of polar phase (~36%) associated with PVDF phase as compared to PVDF/m‐GO and PVDF/m‐EG nanocomposites. Further, the highest permittivity (~58 at 10−1 Hz) was achieved in PVDF/m‐BN nanocomposite, which was also reflected in higher remnant polarization (~61 nC/cm2) and a significantly higher d33 value (~53 pm/V). Moreover, a higher output peak to peak voltage (~13 V) was obtained for the sensor device fabricated from PVDF/m‐BN nanocomposite. Thus, the role of Li‐AHA‐modified 2D nanomaterials in improving the morphology, dielectric, ferroelectric, and piezoelectric characteristics of the PVDF nanocomposites was clearly established.

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Enhancing the properties of PVDF/MFe2O4; (M: Co–Zn and Cu–Zn) nanocomposite for the piezoelectric optronic applications

El-Masry

Ramadan

2022

J Mater Sci: Mater Electron

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Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material whose optical properties need to be enhanced. Zinc ferrite is an excellent photoelectric material, in the present work it was doped separately by (cobalt and copper) ferrite. Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles were synthesized using auto-combustion method and characterized using XRD, FTIR, FESEM and HRTEM. The crystallite size was (28.8, 35.8, 22 and 31) nm for the Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles, while the estimated particle size from HRTEM were 55 nm for the Co-ZnFe2O4 nanoparticles and 75 nm for the Cu-ZnFe2O4. The obtained samples used as PVDF fillers, aiming to improve its optical properties. The optical properties as well as, the piezoelectric response of the prepared PVDF/(Co-ZnFe2O4 and Cu-ZnFe2O4) nanocomposites were investigated. The maximum value for refractive index was related to PVDF/Co-ZnFe2O4 nanocomposite. While, Cu-ZnFe2O4 nanoparticles have limited improvement of the PVDF optical properties. Co-ZnFe2O4 nanoparticles increases the PVDF optical conductivity σopt. four times its original value as well as the dielectric values was increased from 0.05 for neat PVDF to 2. The piezoelectric response of the PVDF polymer is clearly increased by the addition of both Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles.

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PFM Characterization of PVDF Nanocomposite Films With Enhanced Piezoelectric Response

Cited by 27 publications

References 25 publications

Piezoelectric Effect and Electroactive Phase Nucleation in Self-Standing Films of Unpoled PVDF Nanocomposite Films

Piezoelectric Effect and Electroactive Phase Nucleation in Self-Standing Films of Unpoled PVDF Nanocomposite Films

Piezoelectric properties of noncovalently functionalized 2D nanomaterials incorporated poly(vinylidene fluoride) nanocomposites

Enhancing the properties of PVDF/MFe2O4; (M: Co–Zn and Cu–Zn) nanocomposite for the piezoelectric optronic applications

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