Flexible RF electronics and antennas made from textiles are regarded as a technology that acceler... more Flexible RF electronics and antennas made from textiles are regarded as a technology that accelerates the widespread popularity of modern wearable communication devices and components. This work presents a flexible and compact 4 1 rectangular microstrip patch array antenna for radio frequency (RF) energy harvesting applications. It operates at 5 GHz and has a high gain. The proposed antenna incorporates the inset feed technique to improve impedance matching and employs a conductive fabric (E-textile) as a conductor, along with textile as a substrate. The feeding and radiating structures are designed by using stick E shield conductive textiles that possess a conductivity of 5 10 5 S/m and are 0.085 mm thick. This design relies entirely on textile materials to ensure the user's comfort, ease of production, and cost-effectiveness. The Ansys HFSS simulator, which employs the finite element method, was utilized to optimize the antenna design. Subsequently, the suggested configuration was verified using the CST MWS simulator, which utilizes the finite integration method. The study aimed to achieve high gain and robust performance from the designed antenna. The simulation results demonstrate excellent performance within the operating band, with an impedance bandwidth of 6.78% and a high gain of 14.54 dBi at 5 GHz, making it well-suited for radiofrequency (RF) energy harvesting and wearable device applications.
This paper presents and compares films made using the solution casting method with a mixture of p... more This paper presents and compares films made using the solution casting method with a mixture of poly (vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP), graphene oxide (GO), and lead zirconate titanate (PZT). The Hummers' method synthesized GO. Scanning electron microscopy (SEM), Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and tensile testing were realized. The developed composite films were found to have a coherent distribution of PZT and GO in PVDF‐HFP. After that, a gradual improvement, such as an increase in the quantity of β phase, produces high piezoelectric performance. Also, the PVDF‐HFP polymer's thermal stability improved. When 0.1 wt% of PZT/GO was added, the melting temperature increased from 140 to 143°C, and the crystallization temperature from 109 to 113°C. PVDF‐HFP elastic modulus and tensile strength were also considerably reduced as PZT/GO increase...
Piezoelectric nanocomposites have attracted considerable attention from researchers during these ... more Piezoelectric nanocomposites have attracted considerable attention from researchers during these last years for their wide use in the development of electromechanical microsystems (MEMS). In this paper, piezoelectric lead titanate zirconate (PZT) are used with poly(vinylidene fluoride-hexafuoropropylene) (PVdF-HFP) polymer matrix to prepare the piezo thin nanocomposite film. An improvement in the β phase in PVdF-HFP was created by the reaction between the PZT nanoparticles and PVdF-HFP. The process used for the preparation of the film results in the enhancement of the ferroelectric and piezoelectric properties of PVdF-HFP. These polymer nanocomposite films were made by the solvent casting method under ultra-sonication using THF as a solvent, with different percentages of PZT. The results confirm that incorporating PZT nanoparticles in the PVDF-HFP matrix increases the β-phase fraction, enhancing the efficiency of energy harvesting.
IOP Conference Series: Materials Science and Engineering, 2020
Radio Frequency Energy harvesting is an extremely important research subject, linked to sustainab... more Radio Frequency Energy harvesting is an extremely important research subject, linked to sustainability, and could be a potential solution to conventional energy supplies. The main idea is to develop battery-free wireless sensors able to capture the available energy into the mentioned bandwidth. In this paper, a 1.8–2.4 GHz wideband rectenna is designed for radio frequency (RF) energy harvesting in the context of wireless sensor nodes (WSN). For this purpose, the agilent Advanced Design System (ADS) was used. This article presents the design and simulation of a high output voltage rectifier. First, we designed a rectifier based on Metelics MSS20-141 Schottky diode using a series topology to convert electromagnetic energy into DC. Then, a low-pass filter was implemented to filter out undesirable harmonics generated by the non-linear Schottky diode. Simulation results show that load resistance, input frequency and input power are important parameters to evaluate the performances of RF ...
By means of experimental tools, we have studied the effect of lead zirconate titanate volume frac... more By means of experimental tools, we have studied the effect of lead zirconate titanate volume fraction introduced in polyamide-6/lead zirconate titanate composites on dielectric, piezoelectric, mechanical, and structural properties. As the first result, we found that the insertion of lead zirconate titanate particles makes the dielectric permittivity of the polyamide-6 matrix increases from 10 to 95.8. The dielectric property studies reveal that under an electrical field of 1 kV the remnant polarization is also increased from 0.17 to 0.4, this behavior is related to both the increase of volume fraction of lead zirconate titanate from 20% to 40% and the piezoelectric coefficient changes proportionally with that of volume fraction of lead zirconate titanate. Furthermore, piezoelectric activity increases with lead zirconate titanate particle size at a range where there is a lower order of magnitude. Finally, the uniform dispersion of the ceramic lead zirconate titanate particles in poly...
In the last few years, a lot of research focused on increasing of smart textiles products such as... more In the last few years, a lot of research focused on increasing of smart textiles products such as woven and knitted structures, which are able to show significant change in their mechanical properties (such as shape and stiffness), in a practical way in response to the stimuli. In this paper, we investigate the potential of a flexible piezoelectric film stuck onto three woven textile matrices: cotton, polyester/cotton, and Kermel, for harvesting mechanical energy from the textile and converting it into electrical energy. At first, a brief introduction of energy harvesting using the piezoelectric material and smart textile is presented. Furthermore, a basic model showing the operation of polyvinylidene fluoride with 33 mode is established. The second part is focused on standard approach model of energy harvesting based on resistive load and freestanding piezo-polymer for the examination of the performance of 33-mode polyvinylidene fluoride energy harvester and the prediction of harve...
International Journal of Membrane Science and Technology
Future enhancements in radio frequency (RF) energy harvesting technology will make easy the creat... more Future enhancements in radio frequency (RF) energy harvesting technology will make easy the creation of a network with no need of dedicated transmitters, as a reliable source of wireless energy power. Recently, the development and employment of wearable antennas has increased rapidly for application in the miniaturization of wireless communication devices. The principal feature of wearable antennas is that they are designed as garment elements able to transmit or receive wireless signals. In this context, we propose a design of a wearable textile microstrip patch antenna operating for wireless body area network (WBAN)at the resonance frequency =2.40GHz. The microstrip patch antenna with an edge feeding technique is designed and simulated by using the Keysight Advanced Design System (ADS) software. Textile materials have a low dielectric constant that reduces the surface wave losses and increases the impedance bandwidth of the antenna. The chosen dielectric substrate in this work is ...
Energy harvesting is the most efficient way to meet energy demand while also supplying renewable ... more Energy harvesting is the most efficient way to meet energy demand while also supplying renewable energy sources from the environment. This technology consists of recovering of electrical energy from lost energy sources, which are available everywhere, including heat, fluids, vibrations, etc. In particular, energy harvesting via piezoelectric materials, which can convert the energy of vibrations and mechanical deformations into electrical energy, has been the subject in the last decade. This energy is used in a variety of applications, including energy collectors, sensors, and actuators, among others. This study concerns the improvement and enhancement of the properties of Poly (methyl methacrylate) (PMMA). Synthesized PMMA was blended with Poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), and Lead zirconate titanate (PZT) nanoparticles at various composition ratios using solvent casting technique in Tetrahydrofuran (THF). Improvement of properties has confirmed by POM, SE...
Le concept de la récupération d'énergie se rapporte généralement au processus d'utilisati... more Le concept de la récupération d'énergie se rapporte généralement au processus d'utilisation de l'énergie ambiante, qui est converti, principalement (mais pas exclusivement) en énergie électrique pour faire fonctionner des dispositifs électroniques petites et autonomes. Les tendances récentes à la fois dans l'industrie et au domaine de la recherche ont mis l'accent sur les polymères électro-actifs pour la conversion d'énergie électromécanique. Cet intérêt s'explique par de nombreux avantages tels que la productivité élevée, la grande flexibilité, et la facilité de traitement. Le but de ce travail de recherche est d’explorer la potentialité des polymères électro-actifs pour une application de récupération d’énergie mécanique ambiante. Dans la première partie, une synthèse des composites à base de polyuréthane (PU) et de P(VDF-TrFE-CFE) a été réalisée, suivie d’une caractérisation électrique et mécanique de ces polymères et composites afin d’évaluer leurs pa...
Flexible RF electronics and antennas made from textiles are regarded as a technology that acceler... more Flexible RF electronics and antennas made from textiles are regarded as a technology that accelerates the widespread popularity of modern wearable communication devices and components. This work presents a flexible and compact 4 1 rectangular microstrip patch array antenna for radio frequency (RF) energy harvesting applications. It operates at 5 GHz and has a high gain. The proposed antenna incorporates the inset feed technique to improve impedance matching and employs a conductive fabric (E-textile) as a conductor, along with textile as a substrate. The feeding and radiating structures are designed by using stick E shield conductive textiles that possess a conductivity of 5 10 5 S/m and are 0.085 mm thick. This design relies entirely on textile materials to ensure the user's comfort, ease of production, and cost-effectiveness. The Ansys HFSS simulator, which employs the finite element method, was utilized to optimize the antenna design. Subsequently, the suggested configuration was verified using the CST MWS simulator, which utilizes the finite integration method. The study aimed to achieve high gain and robust performance from the designed antenna. The simulation results demonstrate excellent performance within the operating band, with an impedance bandwidth of 6.78% and a high gain of 14.54 dBi at 5 GHz, making it well-suited for radiofrequency (RF) energy harvesting and wearable device applications.
This paper presents and compares films made using the solution casting method with a mixture of p... more This paper presents and compares films made using the solution casting method with a mixture of poly (vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP), graphene oxide (GO), and lead zirconate titanate (PZT). The Hummers' method synthesized GO. Scanning electron microscopy (SEM), Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and tensile testing were realized. The developed composite films were found to have a coherent distribution of PZT and GO in PVDF‐HFP. After that, a gradual improvement, such as an increase in the quantity of β phase, produces high piezoelectric performance. Also, the PVDF‐HFP polymer's thermal stability improved. When 0.1 wt% of PZT/GO was added, the melting temperature increased from 140 to 143°C, and the crystallization temperature from 109 to 113°C. PVDF‐HFP elastic modulus and tensile strength were also considerably reduced as PZT/GO increase...
Piezoelectric nanocomposites have attracted considerable attention from researchers during these ... more Piezoelectric nanocomposites have attracted considerable attention from researchers during these last years for their wide use in the development of electromechanical microsystems (MEMS). In this paper, piezoelectric lead titanate zirconate (PZT) are used with poly(vinylidene fluoride-hexafuoropropylene) (PVdF-HFP) polymer matrix to prepare the piezo thin nanocomposite film. An improvement in the β phase in PVdF-HFP was created by the reaction between the PZT nanoparticles and PVdF-HFP. The process used for the preparation of the film results in the enhancement of the ferroelectric and piezoelectric properties of PVdF-HFP. These polymer nanocomposite films were made by the solvent casting method under ultra-sonication using THF as a solvent, with different percentages of PZT. The results confirm that incorporating PZT nanoparticles in the PVDF-HFP matrix increases the β-phase fraction, enhancing the efficiency of energy harvesting.
IOP Conference Series: Materials Science and Engineering, 2020
Radio Frequency Energy harvesting is an extremely important research subject, linked to sustainab... more Radio Frequency Energy harvesting is an extremely important research subject, linked to sustainability, and could be a potential solution to conventional energy supplies. The main idea is to develop battery-free wireless sensors able to capture the available energy into the mentioned bandwidth. In this paper, a 1.8–2.4 GHz wideband rectenna is designed for radio frequency (RF) energy harvesting in the context of wireless sensor nodes (WSN). For this purpose, the agilent Advanced Design System (ADS) was used. This article presents the design and simulation of a high output voltage rectifier. First, we designed a rectifier based on Metelics MSS20-141 Schottky diode using a series topology to convert electromagnetic energy into DC. Then, a low-pass filter was implemented to filter out undesirable harmonics generated by the non-linear Schottky diode. Simulation results show that load resistance, input frequency and input power are important parameters to evaluate the performances of RF ...
By means of experimental tools, we have studied the effect of lead zirconate titanate volume frac... more By means of experimental tools, we have studied the effect of lead zirconate titanate volume fraction introduced in polyamide-6/lead zirconate titanate composites on dielectric, piezoelectric, mechanical, and structural properties. As the first result, we found that the insertion of lead zirconate titanate particles makes the dielectric permittivity of the polyamide-6 matrix increases from 10 to 95.8. The dielectric property studies reveal that under an electrical field of 1 kV the remnant polarization is also increased from 0.17 to 0.4, this behavior is related to both the increase of volume fraction of lead zirconate titanate from 20% to 40% and the piezoelectric coefficient changes proportionally with that of volume fraction of lead zirconate titanate. Furthermore, piezoelectric activity increases with lead zirconate titanate particle size at a range where there is a lower order of magnitude. Finally, the uniform dispersion of the ceramic lead zirconate titanate particles in poly...
In the last few years, a lot of research focused on increasing of smart textiles products such as... more In the last few years, a lot of research focused on increasing of smart textiles products such as woven and knitted structures, which are able to show significant change in their mechanical properties (such as shape and stiffness), in a practical way in response to the stimuli. In this paper, we investigate the potential of a flexible piezoelectric film stuck onto three woven textile matrices: cotton, polyester/cotton, and Kermel, for harvesting mechanical energy from the textile and converting it into electrical energy. At first, a brief introduction of energy harvesting using the piezoelectric material and smart textile is presented. Furthermore, a basic model showing the operation of polyvinylidene fluoride with 33 mode is established. The second part is focused on standard approach model of energy harvesting based on resistive load and freestanding piezo-polymer for the examination of the performance of 33-mode polyvinylidene fluoride energy harvester and the prediction of harve...
International Journal of Membrane Science and Technology
Future enhancements in radio frequency (RF) energy harvesting technology will make easy the creat... more Future enhancements in radio frequency (RF) energy harvesting technology will make easy the creation of a network with no need of dedicated transmitters, as a reliable source of wireless energy power. Recently, the development and employment of wearable antennas has increased rapidly for application in the miniaturization of wireless communication devices. The principal feature of wearable antennas is that they are designed as garment elements able to transmit or receive wireless signals. In this context, we propose a design of a wearable textile microstrip patch antenna operating for wireless body area network (WBAN)at the resonance frequency =2.40GHz. The microstrip patch antenna with an edge feeding technique is designed and simulated by using the Keysight Advanced Design System (ADS) software. Textile materials have a low dielectric constant that reduces the surface wave losses and increases the impedance bandwidth of the antenna. The chosen dielectric substrate in this work is ...
Energy harvesting is the most efficient way to meet energy demand while also supplying renewable ... more Energy harvesting is the most efficient way to meet energy demand while also supplying renewable energy sources from the environment. This technology consists of recovering of electrical energy from lost energy sources, which are available everywhere, including heat, fluids, vibrations, etc. In particular, energy harvesting via piezoelectric materials, which can convert the energy of vibrations and mechanical deformations into electrical energy, has been the subject in the last decade. This energy is used in a variety of applications, including energy collectors, sensors, and actuators, among others. This study concerns the improvement and enhancement of the properties of Poly (methyl methacrylate) (PMMA). Synthesized PMMA was blended with Poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), and Lead zirconate titanate (PZT) nanoparticles at various composition ratios using solvent casting technique in Tetrahydrofuran (THF). Improvement of properties has confirmed by POM, SE...
Le concept de la récupération d'énergie se rapporte généralement au processus d'utilisati... more Le concept de la récupération d'énergie se rapporte généralement au processus d'utilisation de l'énergie ambiante, qui est converti, principalement (mais pas exclusivement) en énergie électrique pour faire fonctionner des dispositifs électroniques petites et autonomes. Les tendances récentes à la fois dans l'industrie et au domaine de la recherche ont mis l'accent sur les polymères électro-actifs pour la conversion d'énergie électromécanique. Cet intérêt s'explique par de nombreux avantages tels que la productivité élevée, la grande flexibilité, et la facilité de traitement. Le but de ce travail de recherche est d’explorer la potentialité des polymères électro-actifs pour une application de récupération d’énergie mécanique ambiante. Dans la première partie, une synthèse des composites à base de polyuréthane (PU) et de P(VDF-TrFE-CFE) a été réalisée, suivie d’une caractérisation électrique et mécanique de ces polymères et composites afin d’évaluer leurs pa...
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