scholarly journals Piezoelectric Properties of Zinc Oxide/Iron Oxide filled Polyvinylidene fluoride Nanocomposite Fibers

2021 ◽  
Author(s):  
Abdulrahman Mohmmed AlAhzm ◽  
Maan Omar Alejli ◽  
Deepalekshmi Ponnamma ◽  
Yara Elgawady ◽  
Mariam Al Ali Al-Maadeed
Keyword(s):  
Zinc Oxide ◽  
Iron Oxide ◽  
Polyvinylidene Fluoride ◽  
Output Voltage ◽  
Mechanical Energy ◽  
Scanning Calorimetry ◽  
Power Sources ◽  
Hybrid Nanomaterial ◽  
Β Phase ◽  
Nanocomposite Fibers

Abstract Piezoelectric nanogenerators (PENG) with flexible and simple design have pronounced significance in fabricating sustainable devices for self-powering electronics. This study demonstrates the fabrication of electrospun nanocomposite fibers from polyvinylidene fluoride (PVDF) filled Zinc Oxide (ZnO)/Iron Oxide (FeO) nanomaterials. The nanocomposite fiber based flexible PENG showed piezoelectric output voltage of 5.9 V when 3 wt.% of ZnO/FeO hybrid nanomaterial was introduced, which was 29.5 times higher than the neat PVDF. No apparent decline in output voltage was observed for almost 2000 seconds attributed to the outstanding durability. This higher piezoelectric output performance is correlated with the β-phase transformation studies from the Fourier transformation infrared spectroscopy and the crystallinity studies from the differential scanning calorimetry. Both these studies show respective enhancement of 3.79 and 2.16 % in the β-phase crystallinity values of PVDF-ZnO/FeO 3 wt.% composite. Higher dielectric constant value obtained for the same composite (3 times higher than the neat PVDF) confirms the increased energy storage efficiency as well. Thus the proposed soft and flexible PENG is a promising mechanical energy harvester, and its good dielectric properties reveals the ability to use this material as good power sources for wearable and flexible electronic devices.

scholarly journals Piezoelectric properties of zinc oxide/iron oxide filled polyvinylidene fluoride nanocomposite fibers

2021 ◽  
Author(s):  
Abdulrahman Mohmmed AlAhzm ◽  
Maan Omar Alejli ◽  
Deepalekshmi Ponnamma ◽  
Yara Elgawady ◽  
Mariam Al Ali Al-Maadeed
Keyword(s):  
Zinc Oxide ◽  
Iron Oxide ◽  
Polyvinylidene Fluoride ◽  
Output Voltage ◽  
Mechanical Energy ◽  
Scanning Calorimetry ◽  
Power Sources ◽  
Hybrid Nanomaterial ◽  
Β Phase ◽  
Nanocomposite Fibers

AbstractPiezoelectric nanogenerators (PENG) with flexible and simple design have pronounced significance in fabricating sustainable devices for self-powering electronics. This study demonstrates the fabrication of electrospun nanocomposite fibers from polyvinylidene fluoride (PVDF) filled zinc oxide (ZnO)/iron oxide (FeO) nanomaterials. The nanocomposite fiber based flexible PENG shows piezoelectric output voltage of 5.9 V when 3 wt% of ZnO/FeO hybrid nanomaterial is introduced, which is 29.5 times higher than the neat PVDF. No apparent decline in output voltage is observed for almost 2000 s attributed to the outstanding durability. This higher piezoelectric output performance is correlated with the β-phase transformation studies from the Fourier transformation infrared spectroscopy and the crystallinity studies from the differential scanning calorimetry. Both these studies show respective enhancement of 3.79 and 2.16% in the β-phase crystallinity values of PVDF-ZnO/FeO 3 wt% composite. Higher dielectric constant value obtained for the same composite (three times higher than the neat PVDF) confirms the increased energy storage efficiency as well. Thus the proposed soft and flexible PENG is a promising mechanical energy harvester, and its good dielectric properties reveals the ability to use this material as good power sources for wearable and flexible electronic devices.

Crystalinity Properties of Carbon Nanotube-Polyvinylidene Fluoride Composites

2008 ◽  
Vol 1134 ◽  
Author(s):  
Xiaobing Shan ◽  
Pei-xuan Wu ◽  
Lin Zhang ◽  
Zhong-Yang Cheng
Keyword(s):  
Differential Scanning Calorimetry ◽  
Carbon Nanotube ◽  
Acid Treatment ◽  
Polyvinylidene Fluoride ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Β Phase ◽  
Solution Cast ◽  
Solution Cast Method

AbstractSingle-wall and multi-wall carbon nanotube blends (0 to 0.5 vol% ) with polyvinylidene fluoride (PVDF) have been prepared using solution cast method and characterized. By acid treatment, it has been observed that nanotube has been well functionalized and uniformly dispersed into the polymer. X-ray diffraction analysis coupled with differential scanning calorimetry (DSC) has revealed that carbon nanotube alters the crystallinity of PVDF and thereby enhances the β-phase in PVDF. Experimental results have demonstrated that enhancement of β-phase is a function of carbon nanotube concentration.

scholarly journals Wearable Woven Triboelectric Nanogenerator Utilizing Electrospun PVDF Nanofibers for Mechanical Energy Harvesting

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 438 ◽  
Author(s):  
Muhammad Omar Shaikh ◽  
Yu-Bin Huang ◽  
Cheng-Chien Wang ◽  
Cheng-Hsin Chuang
Keyword(s):  
Polyvinylidene Fluoride ◽  
Mechanical Energy ◽  
Wearable Devices ◽  
Human Motion ◽  
Triboelectric Nanogenerator ◽  
Free Standing ◽  
Β Phase ◽  
Applied Forces ◽  
Self Powered ◽  
High Output Voltage

Several wearable devices have already been commercialized and are likely to open up a new life pattern for consumers. However, the limited energy capacity and lifetime have made batteries the bottleneck in wearable technology. Thus, there have been growing efforts in the area of self-powered wearables that harvest ambient mechanical energy directly from surroundings. Herein, we demonstrate a woven triboelectric nanogenerator (WTENG) utilizing electrospun Polyvinylidene fluoride (PVDF) nanofibers and commercial nylon cloth to effectively harvest mechanical energy from human motion. The PVDF nanofibers were fabricated using a highly scalable multi-nozzle far-field centrifugal electrospinning protocol. We have also doped the PVDF nanofibers with small amounts of multi-walled carbon nanotubes (MWCNT) to improve their triboelectric performance by facilitating the growth of crystalline β-phase with a high net dipole moment that results in enhanced surface charge density during contact electrification. The electrical output of the WTENG was characterized under a range of applied forces and frequencies. The WTENG can be triggered by various free-standing triboelectric layers and reaches a high output voltage and current of about 14 V and 0.7 µA, respectively, for the size dimensions 6 × 6 cm. To demonstrate the potential applications and feasibility for harvesting energy from human motion, we have integrated the WTENG into human clothing and as a floor mat (or potential energy generating shoe). The proposed triboelectric nanogenerator (TENG) shows promise for a range of power generation applications and self-powered wearable devices.

scholarly journals Influence of ZrO2 and TiO2 Nano Particles in P(VDF-TrFE) Composite For Energy Harvesting Application

2021 ◽  
Author(s):  
Arunguvai J ◽  
Lakshmi P
Keyword(s):  
Photoelectron Spectroscopy ◽  
Polyvinylidene Fluoride ◽  
Output Voltage ◽  
Ceramic Composite ◽  
Low Frequency ◽  
Nano Particles ◽  
Sensor Applications ◽  
Β Phase ◽  
Titanium Material ◽  
Ceramic Fillers

Abstract Zirconium and Titanium material are used for making PZT piezoelectric ceramic composite. In this article, Zirconium dioxide (ZrO2) and Titanium dioxide (TiO2) ceramic fillers with, ferroelectric polymer PolyVinyliDene fluoride-Tri Fluoro Ethylene( P(VDF-TrFE)) forms the ZrO2/P(VDF-TrFE) and TiO2 /P(VDF-TrFE) nano-composite. The scanning electron microscope (SEM) with EDS examine the TiO2, ZrO2 fillers presents in composite. The ceramic fillers molecules Ti 2p and Zr 3d binding energy are confirmed by X-Ray photoelectron spectroscopy (XPS). Each composite reaches their piezoelectric β- phase are confirmed by Fourier Transform - Infrared Spectroscopy (FT-IR). The low surface roughness of the thin-film reaches more flexibility and deformation of cantilever. The ZrO2/P(VDF-TrFE) composite is obtained low average surface value of 10nm in the region of 50µm is measured from Gwyddion software. Natural resonance frequency of ceramic composite reaches 100Hz low frequency is measured by Lased Doppler Vibrometer. The cantilever beam structure energy harvester produces peak to peak output voltage 8.2 V. The harvested output voltage used for electronics devices and sensor applications.

scholarly journals Influence of MWCNTs on β-Phase PVDF and Triboelectric Properties

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Sejung Kim ◽  
Youngjun Song ◽  
Michael J. Heller
Keyword(s):  
Polyvinylidene Fluoride ◽  
Output Voltage ◽  
Nucleation Site ◽  
Maximum Output ◽  
Multiwalled Carbon ◽  
Chemically Modified ◽  
Carboxylic Acid Groups ◽  
Β Phase ◽  
Active Layers ◽  
Phase Nucleation

The surface of multiwalled carbon nanotubes (MWCNTs) was chemically modified using 1-pyrenebutyric acid (PBA) to improve its compatibility with polyvinylidene fluoride (PVDF). The carboxylic acid groups of the MWCNTs-PBA (PCNTs) provide a β-phase nucleation site to the fluorine of PVDF along their surface. The content of the β-phase crystalline structure of PVDF was found to be the highest at a concentration of 1.0 wt.% of PCNTs, and these PVDF-PCNTs composites were utilized as active layers in triboelectric devices. The maximum output voltage achieved was 16 volts at a concentration of 1.0 wt.% of PCNTs in the PVDF composites.

Multiferroic PVDF–Fe3O4 hybrid films with reduced graphene oxide and ZnO nanofillers

RSC Advances ◽  
2016 ◽  
Vol 6 (24) ◽  
pp. 20089-20094 ◽  
Author(s):  
Ehab H. Abdelhamid ◽  
O. D. Jayakumar ◽  
Vasundhara Kotari ◽  
Balaji P. Mandal ◽  
Rekha Rao ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Iron Oxide ◽  
Reduced Graphene Oxide ◽  
Polyvinylidene Fluoride ◽  
Solvent Casting ◽  
Hybrid Films ◽  
Casting Method ◽  
Magnetic Iron Oxide ◽  
Reduced Graphene

Flexible and self-standing polyvinylidene fluoride (PVDF) films loaded with nanofillers, reduced graphene oxide (RGO), zinc oxide (ZnO) and magnetic iron oxide (Fe3O4) nanoparticles, were prepared by a solvent casting method.

scholarly journals Smart and Robust Nanocomposite Fibers for Self-Powering

2020 ◽  
Author(s):  
Shahad alkhair ◽  
Deepalekshmi Ponnamma ◽  
Abdulla Aljanahi ◽  
Abdulla AlNasr
Keyword(s):  
Energy Storage ◽  
Polyvinylidene Fluoride ◽  
Specific Method ◽  
Hybrid Nanocomposite ◽  
Electronic Textiles ◽  
Environmental Friendliness ◽  
Power Sources ◽  
Electrospinning Method ◽  
Base Polymer ◽  
Nanocomposite Fibers

Many of the devices, demands power sources for their continuous and long-term operations, selfpowering devices with good flexibility, mechanical robustness, highly efficient energy storage performance and environmental friendliness are investigated. Polyvinylidene fluoride hexafluoropropylene (PVDF-HFP) is used as the base polymer in our study. Hybrid combination of nanoparticles –iron oxide (FeO) and titanium dioxide (TiO2) is used to reinforce with the polymer and the electrospinning method was adopted for the sample preparation. This specific method helps the polymer dipoles to align in specific directions so that the resultant fibers exhibit remarkable piezoelectric property. Other than studying the crystallinity and morphology, the energy storage of the material is also investigated, and correlated with the output voltage generation. The research results shows improve in the crystallinity structure of the hybrid nanocomposite thus enhanced piezoelectricity. In addition, it shows improved dielectric constant of the hybrid nanocomposite thus improving storage capabilities of the developed material. Additional researches could be directed to test the ability of the developed hybrid nanocomposite to absorb electromagnetic radiation. In addition, investigating self-cleaning properties due to the presence of TiO2 nanoparticles can be a good study. The established material can be used in numerous applications such as smart electronic textiles, biomedical applications, and artificial intelligence.

scholarly journals Microstructure Dependence of Output Performance in Flexible PVDF Piezoelectric Nanogenerators

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3252
Author(s):  
Yijing Jiang ◽  
Yongju Deng ◽  
Hongyan Qi
Keyword(s):  
Polyvinylidene Fluoride ◽  
Piezoelectric Materials ◽  
Mechanical Energy ◽  
Short Circuit ◽  
Large Fraction ◽  
Thick Films ◽  
Electronic Devices ◽  
Β Phase ◽  
Output Performance ◽  
Piezoelectric Nanogenerators

Flexible piezoelectric nanogenerators have attracted great attention due to their ability to convert ambient mechanical energy into electrical energy for low-power wearable electronic devices. Controlling the microstructure of the flexible piezoelectric materials is a potential strategy to enhance the electrical outputs of the piezoelectric nanogenerator. Three types of flexible polyvinylidene fluoride (PVDF) piezoelectric nanogenerator were fabricated based on well-aligned nanofibers, random oriented nanofibers and thick films. The electrical output performance of PVDF nanogenerators is systematically investigated by the influence of microstructures. The aligned nanofiber arrays exhibit highly consistent orientation, uniform diameter, and a smooth surface, which possesses the highest fraction of the polar crystalline β phase compared with the random-oriented nanofibers and thick films. The highly aligned structure and the large fraction of the polar β phase enhanced the output performance of the well-aligned nanofiber nanogenerator. The highest output voltage of 14 V and a short-circuit current of 1.22 µA were achieved under tapping mode of 10 N at 2.5 Hz, showing the potential application in flexible electronic devices. These new results shed some light on the design of the flexible piezoelectric polymer-based nanogenerators.

scholarly journals Demonstration of Phase Change Thermal Energy Storage in Zinc Oxide Microencapsulated Sodium Nitrate

2021 ◽  
Vol 11 (13) ◽  
pp. 6234
Author(s):  
Ciprian Neagoe ◽  
Ioan Albert Tudor ◽  
Cristina Florentina Ciobota ◽  
Cristian Bogdanescu ◽  
Paul Stanciu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Thermal Properties ◽  
High Temperature ◽  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Sodium Nitrate ◽  
Thermal Energy Storage ◽  
Metal Corrosion ◽  
Scanning Calorimetry

Microencapsulation of sodium nitrate (NaNO3) as phase change material for high temperature thermal energy storage aims to reduce costs related to metal corrosion in storage tanks. The goal of this work was to test in a prototype thermal energy storage tank (16.7 L internal volume) the thermal properties of NaNO3 microencapsulated in zinc oxide shells, and estimate the potential of NaNO3–ZnO microcapsules for thermal storage applications. A fast and scalable microencapsulation procedure was developed, a flow calorimetry method was adapted, and a template document created to perform tank thermal transfer simulation by the finite element method (FEM) was set in Microsoft Excel. Differential scanning calorimetry (DSC) and transient plane source (TPS) methods were used to measure, in small samples, the temperature dependency of melting/solidification heat, specific heat, and thermal conductivity of the NaNO3–ZnO microcapsules. Scanning electron microscopy (SEM) and chemical analysis demonstrated the stability of microcapsules over multiple tank charge–discharge cycles. The energy stored as latent heat is available for a temperature interval from 303 to 285 °C, corresponding to onset–offset for NaNO3 solidification. Charge–self-discharge experiments on the pilot tank showed that the amount of thermal energy stored in this interval largely corresponds to the NaNO3 content of the microcapsules; the high temperature energy density of microcapsules is estimated in the range from 145 to 179 MJ/m3. Comparison between real tank experiments and FEM simulations demonstrated that DSC and TPS laboratory measurements on microcapsule thermal properties may reliably be used to design applications for thermal energy storage.

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