scholarly journals Impact of Multi-Walled CNT Incorporation on Dielectric Properties of PVDF-BaTiO3 Nanocomposites and Their Energy Harvesting Possibilities

Coatings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 77
Author(s):  
Abu Sadat M. Iftekhar Uddin ◽  
Dongin Lee ◽  
Chanseob Cho ◽  
Bonghwan Kim
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Fine Tuning ◽  
Nanocomposite Films ◽  
Maximum Output ◽  
Piezoelectric Energy ◽  
Multi Walled Carbon Nanotubes ◽  
The Impact

The current study investigated the fabrication of multi-walled carbon nanotubes (MWCNTs) adhering to Barium titanate (BaTiO3) nanoparticles and poly(vinylidene fluoride) (PVDF) nanocomposites, as well as the impact of MWCNT on the PVDF-BaTiO3 matrix in terms of dielectric constant and dielectric loss with a view to develop a high performance piezoelectric energy harvester in future. The capacity and potential of as-prepared nanocomposite films for the fabrication of high-performance flexible piezoelectric nanogenerator (PNG) were also investigated in this work. In particular, five distinct types of nanocomposites and films were synthesized: PB (bare PVDF–BaTiO3), PBC-1 (PVDF–BaTiO3-0.1 wt% CNT), PBC-2 (PVDF–BaTiO3-0.3 wt% CNT), PBC-3 (PVDF–BaTiO3-0.5 wt% CNT), and PBC-4 (PVDF–BaTiO3-1 wt% CNT). The dielectric constant and dielectric loss increased as MWCNT concentration increased. Sample PBC-3 had the optimum dielectric characteristics of all the as-prepared samples, with the maximum output voltage and current of 4.4 V and 0.66 μA, respectively, with an applied force of ~2N. Fine-tuning the BaTiO3 content and thickness of the PNGs is likely to increase the harvester’s performance even more. It is anticipated that the work would make it easier to fabricate high-performance piezoelectric films and would be a suitable choice for creating high-performance PNG.

High dielectric constant and low dielectric loss poly(vinylidene fluoride) nanocomposites via a small loading of two-dimensional Bi2Te3@Al2O3 hexagonal nanoplates

2018 ◽  
Vol 6 (2) ◽  
pp. 271-279 ◽  
Author(s):  
Jianwen Chen ◽  
Xiucai Wang ◽  
Xinmei Yu ◽  
Lingmin Yao ◽  
Zhikui Duan ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
Vinylidene Fluoride ◽  
Nanocomposite Films ◽  
Two Dimensional ◽  
Low Dielectric ◽  
Poly Vinylidene Fluoride ◽  
High Dielectric ◽  
Hexagonal Nanoplates

Nanocomposite films with a small loading of two-dimensional Bi2Te3@Al2O3 hexagonal nanoplates exhibit a high dielectric constant of 140 and relatively low dielectric loss of 0.05 at 1 kHz.

Preparation and Electrical Properties of the Polyimide/Multi-Walled Carbon Nanotubes (MWNTs) Nanocomposites

2011 ◽  
Vol 675-677 ◽  
pp. 1237-1240 ◽  
Author(s):  
Ming Yan Zhang ◽  
Xiao Ying Zhu ◽  
Peng He Diao ◽  
Wen Jia Wang ◽  
Xiao Dong Li
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Dielectric Loss ◽  
Loss Factor ◽  
In Situ Polymerization ◽  
Dielectric Loss Factor ◽  
Nanocomposite Films ◽  
Sharp Drop ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The polyimide/multi-walled carbon nanotubes (MWNTs) nanocomposite films were prepared by means of ultrasonic blending and in-situ polymerization. MWNTs were modified with mixed strong acid in order to improve the chemical compatibility between polyimide matrix and MWNTs. The effects of the incorporation of MWNTs on the electrical property were researched in this study. The results showed that with the increase of the content of acid-modified MWNTs, the dielectric strength decreased gradually and had a sharp drop when the addition content was close to 0.6 wt%, the dielectric constant and the dielectric loss factor increased obviously. With the rise of the test frequency, the dielectric constant declined slowly and the dielectric loss factor increased. The corona resistance time of the nanocomposite films was all higher than that of the pure polyimide.

High-performance capacitors based on NaNbO3 nanowires/poly(vinylidene fluoride) nanocomposites

2018 ◽  
Vol 6 (30) ◽  
pp. 14614-14622 ◽  
Author(s):  
Zhongbin Pan ◽  
Lingmin Yao ◽  
Guanglong Ge ◽  
Bo Shen ◽  
Jiwei Zhai
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Nanocomposite Films ◽  
Discharge Energy ◽  
High Discharge ◽  
Fast Discharge ◽  
Poly Vinylidene Fluoride ◽  
Discharge Energy Density

Nanocomposite films loaded with small NaNbO3 nanowires exhibit a high discharge energy density of 12.26 J cm−3 at 410 MV m−1, superior power density of 2.01 MW cm−3, and ultra-fast discharge speed of 146 ns.

Dielectric and Hot/Wet Properties of Methyl-Silsesquioxane/Cyanate Ester Resin Hybrid Materials

2011 ◽  
Vol 216 ◽  
pp. 630-634
Author(s):  
Zeng Ping Zhang ◽  
Yong Wen ◽  
Hong Zhao Du ◽  
Jian Zhong Pei ◽  
Shuan Fa Chen
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
High Performance ◽  
Printed Circuit Board ◽  
Cyanate Ester ◽  
Circuit Board ◽  
Printed Circuit ◽  
Cyanate Ester Resin ◽  
Properties Of Materials

Methylsilsesquioxane (Me-SSQ) was incorporated into cyanate ester resin (CE) to obtain organic-inorganic hybrids with better dielectric properties in this study. First, methyltriethoxysilane was hydrolyzed and condensed to synthesize Me-SSQ. Then several Me-SSQ/CE hybrids containing different contents of Me-SSQ were prepared. The effect of Me-SSQ content on the dielectric and hot/wet properties of materials was investigated. Results showed that the Me-SSQ/CE hybrid containing 20wt% of Me-SSQ shows a dielectric constant of 2.78, which is much lower than the pure CE resin. At the same time, the dielectric loss of the Me-SSQ/CE hybrids was slightly increased (tanδ<0.006). It indicates that Me-SSQ/CE hybrid is a promising matrix materials for high-performance printed circuit board (PCB).

scholarly journals The Effect of Ca Dopant on the Electrical and Dielectric Properties of BaTi4O9 Sintered Ceramics

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5375
Author(s):  
Asad Ali ◽  
Muhammad Hasnain Jameel ◽  
Sarir Uddin ◽  
Abid Zaman ◽  
Zafar Iqbal ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Impedance Spectroscopy ◽  
Energy Loss ◽  
Interfacial Polarization ◽  
Storage Material ◽  
Energy Storage Material ◽  
The Impact

The current research examines the impact of Ca2+ substitution on the phase and electrical properties of (Ba1−xCax)Ti4O9, (x = 0.0, 0.3, 0.6, and 0.9) sintered pellets synthesized by solid-state reaction method. The as-synthesized samples were analyzed using X-ray diffraction (XRD) and impedance spectroscopy. The emergence of orthorhombic phase fit into space group Pnmm was revealed by XRD, and the addition of Ca resulted in a considerable shift in grain size. Dielectric properties were determined using an impedance spectroscopy in a wide frequency range from 1MHz to 3 GHz. The dielectric properties i.e., dielectric constant (εr) and dielectric loss (tanσ), were measured at 3 GHz frequency. The frequency-dependent parameters such as conductivity, dielectric constant, and dielectric loss indicated that the relaxation process is a Maxwell–Wagner type of interfacial polarization. The improved dielectric properties and low energy loss have made (Ba1−xCax)Ti4O9 a prominent energy storage material. This study provides the possibility to improve its dielectric properties and reduce energy loss, making it an excellent energy storage material.

Hybrid fibrous (PVDF-BaTiO3)/ PA-11 piezoelectric patch as an energy harvester for pacemakers

2022 ◽  
pp. 152808372110575
Author(s):  
Shohreh Mashayekhan ◽  
Hannaneh Kabir ◽  
Hadis Kamalidehghan ◽  
Roohollah Bagherzadeh ◽  
Mohammad Sajad Sorayani Bafqi
Keyword(s):  
Mechanical Strength ◽  
High Performance ◽  
Energy Harvester ◽  
Vinylidene Fluoride ◽  
Electrical Energy ◽  
Hybrid Structure ◽  
Implantable Medical Devices ◽  
Polyamide 11 ◽  
Piezoelectric Patch ◽  
Piezoelectric Energy

Lithium batteries have been widely used to power up implantable medical devices such as pacemakers that are often designed to treat, diagnose, and prevent different diseases. However, due to their limited capacity and lifetime, patients have to undergo a surgical procedure to replace the discharged battery. Recently, nanogenerators have been emerged and are broadly accepted since they can convert tiny biomechanical forces, such as heartbeats, into electrical energy. This study aims to manufacture a biocompatible and high-performance piezoelectric energy harvester (PEH) that is capable to be charged by the energy received from the heartbeat and store the generated voltage. In this research, a hybrid structure of poly (vinylidene fluoride) (PVDF) coupling with polyamide-11 (PA-11) was fabricated using dual electrospinning to enhance the piezoelectric properties of the intended PEH. The piezoelectric test results show an acceptable increase in nanofibers’ piezoelectric sensitivity from 62.87 mV/N to 75.75 mV/N by adding 25% (v/v) of PA-11 to PVDF, indicating the synergistic effect of PVDF and PA-11. The specimen PVDF (75% v/v)-PA-11 (25% v/v) also showed the highest mechanical strength and consequently is suggested as the optimum sample. To further enhance the efficacy and sensitivity of PEH to convert the small mechanical forces into an acceptable voltage, 15% (w/w) of barium titanate (BaTiO3) nanoparticles were added to the hybrid structure. The crystallinity and mechanical strength were noticeably increased by incorporating BaTiO3 nanoparticles into the fibrous structure, leading to a piezoelectric sensitivity of 107.52 mV/N. This result lays the groundwork for producing an effective piezoelectric patch that could be used as pacemaker batteries.

Bi2S3/poly(vinylidene fluoride) composite with high dielectric constant and unusual low dielectric loss based on preferentially oriented fillers

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96258-96264 ◽  
Author(s):  
Jie Liu ◽  
Yu Luo ◽  
Yao Wang ◽  
Yuan Deng ◽  
Xitong Xie
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Hot Pressing ◽  
High Dielectric Constant ◽  
Vinylidene Fluoride ◽  
Bismuth Sulfide ◽  
Two Phase ◽  
Low Dielectric ◽  
Poly Vinylidene Fluoride ◽  
High Dielectric

In this work, a novel two-phase ferroelectric polymer composite, consisting of semiconducting bismuth sulfide nanorods and a poly(vinylidene fluoride) matrix, was fabricated by a sequence of casting, hot-stretching and hot-pressing techniques.

Analysis on the Mechanical and Electrical Properties of PI/MWNTs Nano-Hybrid Films

2011 ◽  
Vol 675-677 ◽  
pp. 1241-1244
Author(s):  
Ming Yan Zhang ◽  
Peng He Diao ◽  
Xiao Ying Zhu
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
In Situ Polymerization ◽  
Low Frequency ◽  
Frequency Region ◽  
Hybrid Films ◽  
Polyimide Films ◽  
High Frequency Region ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this paper, MWNTs (multi-walled carbon nanotubes) were modified by the mixture acid of H2SO4 and HNO3, the PI (polyimide)/MWNTs nano-hybrid films were prepared by means of ultrasonic vibration and in-situ polymerization. The surface morphology was characterized by SEM, the chemical structure was characterized by FT-IR. The tensile strength and Young’s modulus increased at first and then decreased with the increase of MWNTs content. The dielectric constant was tested at a frequency of 1 kHz. The dielectric constant had no obvious variation when MWNTs content was less than 2.9 wt%, as the MWNTs content exceeded 5.36 wt%, the dielectric constant increased rapidly. In general, the dielectric loss of PI/MWNTs nano-hybrid films was higher than the dielectric loss of pure polyimide films. The dielectric loss increased slowly in low frequency region but rapidly in high frequency region. All the test results were attributed to the dispersion degree of MWNTs doping and the combination degree between PI matrix and modified MWNTs in PI/MWNTs nano-hybrid films.

High dielectric poly(vinylidene fluoride) nanocomposite films with MoS2 using polyaniline interlinker via interfacial interaction

2017 ◽  
Vol 5 (46) ◽  
pp. 12121-12133 ◽  
Author(s):  
Nirmal Maity ◽  
Amit Mandal ◽  
Arun K. Nandi
Keyword(s):  
Dielectric Constant ◽  
Molybdenum Disulfide ◽  
Vinylidene Fluoride ◽  
Interfacial Interaction ◽  
Nanocomposite Films ◽  
Good Dispersion ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
High Dielectric

Aniline in situ polymerized within exfoliated molybdenum disulfide produces MoS2–PANI with raspberry morphology, showing good dispersion into poly(vinylidene fluoride)(PVDF) and produces 86% β-phase PVDF yielding dielectric constant 586 at 102 Hz.

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