Investigation on the effect of γ-irradiation on the dielectric and piezoelectric properties of stretchable PVDF/Fe–ZnO nanocomposites for self-powering devices

Parangusan, Hemalatha; Ponnamma, Deepalekshmi; Al‐Maadeed, Mariam Al Ali

doi:10.1039/c8sm01655k

Cited by 68 publications

(43 citation statements)

References 64 publications

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“…PVDF is an electroactive polymer with stretchable design, good biocompatibility and low acoustic impedance so that many sensors and lightweight energy harvesting devices are made of this polymer based nanocomposites. 16,[18][19][20][21][22] Since the beta phase of the PVDF contributes to its polarizability and piezoelectricity, the alpha to beta or gamma to beta phase conversion is highly anticipated while incorporating various fillers into it. PVDF based flexible sensors are attaining much significance as piezoelectric nanogenerators, sound absorbers and typical sensors.…”

Section: Introductionmentioning

confidence: 99%

Gas Sensing and Power Harvesting Polyvinylidene Fluoride Nanocomposites Containing Hybrid Nanotubes

Ponnamma

Sharma

Saharan

et al. 2020

Journal of Elec Materi

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Gas sensing properties at room temperature and energy harvesting performances are realized for the polyvinylidene fluoride (PVDF) nanocomposites containing titanium dioxide (TiO 2) nanotubes grown in the presence of carbon nanotubes (CNT). While hydrothermal reaction is practiced for the development of TiO 2 /CNT hybrid nanotubes, spin coating is done for the nanocomposite films to be deposited on sensing electrodes. Influence of various filler concentrations and the synergistic combination of fillers on the sensing characteristics are studied by recording the response times and the stability of the results. Upon exposure to liquefied petroleum gas, the PVDF/TiO 2-CNT (2.5 wt.%) gas sensor shows a sensing response of 0.45 s (400 ppm LPG), approximately nine times higher than the composite containing 2.5 wt.% of TiO 2 or 2.5 wt.% CNT. The piezoelectric response of the samples is also recorded and correlated with the synergistic influence of the filler materials. The current study can stimulate a good trend in fabricating self-powered gas sensors from PVDF nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Gas Sensing and Power Harvesting Polyvinylidene Fluoride Nanocomposites Containing Hybrid Nanotubes

Ponnamma

Sharma

Saharan

et al. 2020

Journal of Elec Materi

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“…Nanocellulose and Fe doped ZnO nanoparticle‐loaded PVDF polymer‐based hybrid nanocomposite has also been developed for the piezoelectric application by this research group (Ponnamma et al) and they reported that this hybrid nanocomposite‐based piezoelectric nanogenerator can generate 12 V output voltage which is 2.3 times higher output as compared to the pure PVDF‐HFP‐based nanogenerator. Furthermore, Fe doped ZnO incorporated PVDF‐HFP solution cast film‐based piezoelectric nanogenerator has also been reported by Ponnamma and coworkers and they have reported this nanogenerator can generate 2.4 V output voltage with 2% loading of the filler. Similarly, piezoelectric nanogenerator has been developed by using lead‐free KNN piezoelectric materials in the different forms such as particles, nanorods, and nanowires.…”

Section: Introductionmentioning

confidence: 58%

A hybrid piezoelectric nanogenerator comprising of KNN/ZnO nanorods incorporated PVDF electrospun nanocomposite webs

Bairagi

Ali

2020

Int J Energy Res

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A unique potassium sodium niobate (KNN)/zinc oxide (ZnO) incorporated Poly(vinylidene fluoride) (PVDF) polymer-based hybrid piezoelectric nanogenerator has been developed by using electrospinning process.Electrospinning method has been used due to its remarkable role in improving the piezoelectric performance of the nanocomposite based nanogenerator by providing mechanical stretching and in situ poling of both the polymer as well as filler at the same time. The PVDF/KNN/ZnO electrospun nanocompositebased piezoelectric nanogenerator exhibits the maximum output voltage as compared to PVDF/KNN and PVDF/ZnO based nanogenerator. The output voltage and current for the PVDF/KNN/ZnO based nanogenerator are 25 V and 1.81 μA (when pressure is applied by the finger tapping mode) and 8.31 V and 5 μA (when pressure is applied by standard sewing machine). The synergistic effect of KNN and ZnO nanorods into PVDF polymer matrix significantly improves the resultant piezoelectric performance of the PVDF/KNN/ZnO based nanogenerator by which it has been possible to glow an LED, power density of 11.31 μW/cm 2 (finger tapping) and 10.38 μW/cm 2 (pressure applied by sewing machine). Finally, the practical applicability of the produced nanogenerator has been checked by attaching it on elbow and wrist of a human hand, which shows 90 mV (for elbow), 400 mV (front side of wrist), and 225 mV (back side of wrist) output voltage by bending and moving of the same. K E Y W O R D Sbeta nucleation, in situ poling, nanofibrous web, nanorods, piezoelectric, PVDF/KNN/ZnO hybrid structure

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“…When the images for all samples before and after gamma irradiation are considered, the surface roughness is found to be affected by the radiation. In all cases, after the gamma irradiation the surface became rougher, indicating the chain scission/crosslinking usually associated with gamma irradiation [39,40]. In addition, the fiber diameter also changes upon the addition of nanoparticles.…”

Section: Morphology and Structural Analysis Of The Ps Nanocomposite Fmentioning

confidence: 92%

White Graphene-Cobalt Oxide Hybrid Filler Reinforced Polystyrene Nanofibers for Selective Oil Absorption

et al. 2019

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In this work, stable hydrophobic nanocomposites are made from electrospun fibers of polystyrene (PS) containing a hybrid filler combination of (i) hexagonal boron nitride (hBN) and (ii) cobalt oxide (Co3O4) nanomaterials. Good synergistic interaction is observed between the nanomaterials, since the growth of Co3O4 was carried out in presence of white graphene nanosheets. Filler synergy modifies the PS surfaces, by enhancing the filler-polymer interfacial interactions and provides good tensile strength. The hydrophobic films are gamma irradiated to improve crosslinking within the polymer nanocomposites. Since gamma irradiation enhances the surface roughness, its hydrophobicity/oleophilicity increases much and the final nanofibers show good oil-water separation efficiency. The nanofibers act as sponge clothing to skim the oil from a mixture of oil and water. Durability of the fibers in hot water and in presence of ultrasonic waves is also tested and good response is achieved. Contact angle studies are performed to investigate the surface properties and to check the influence of gamma irradiation on the surface wettability. The gamma-irradiated PS nanocomposite fiber shows a contact angle of 152° ± 2° compared to the 140° ± 1° of the neat PS fiber, evidencing the superhydrophobicity. Both the effects of crosslink density enhancement and hybrid filler distribution make the composite fibers stronger in oil absorption application even at higher operation temperatures. The fibers are reported to be robust and durable, in addition.

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Investigation on the effect of γ-irradiation on the dielectric and piezoelectric properties of stretchable PVDF/Fe–ZnO nanocomposites for self-powering devices

Abstract: Stretchable films of PVDF nanocomposites containing iron doped ZnO (Fe–ZnO) nanostars are fabricated following simple solution mixing and γ-irradiation treatment.

Cited by 68 publications

References 64 publications

Gas Sensing and Power Harvesting Polyvinylidene Fluoride Nanocomposites Containing Hybrid Nanotubes

Gas Sensing and Power Harvesting Polyvinylidene Fluoride Nanocomposites Containing Hybrid Nanotubes

A hybrid piezoelectric nanogenerator comprising of KNN/ZnO nanorods incorporated PVDF electrospun nanocomposite webs

White Graphene-Cobalt Oxide Hybrid Filler Reinforced Polystyrene Nanofibers for Selective Oil Absorption

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