Peiyuan Wang , Jun Xue , Hong Kong , Jun Zheng , Hongying Tian
{"title":"Highly stretchable and mulfunctional sensor based on PVDF-TrFE/Fe3O4 composites nanofibres to discriminate texture characteristics","authors":"Peiyuan Wang , Jun Xue , Hong Kong , Jun Zheng , Hongying Tian","doi":"10.1016/j.elstat.2025.104029","DOIUrl":"10.1016/j.elstat.2025.104029","url":null,"abstract":"<div><div>Recently, stretchable and flexible sensors that can mimic human skin have received widespread attention. Piezoelectric nanofibres are widely used in biomedical, health detection, human-computer collaboration and motion monitoring due to their flexibility, corrosion resistance and biocompatibility. Herein, a stretchable piezoelectric multifunctional sensor based on PVDF-TrFE/Fe<sub>3</sub>O<sub>4</sub> composite nanofibres and inspired by a serpentine structure is proposed. Moreover, the fabrication method of the flexible stretchable sensor and its working principle are presented in detail. This obtained sensor reveals strong mechanical properties of a superior bending sensing characteristic at diverse bending angles, an ultimate linear sensing pressure of 80 kPa and an excellent frequency sensing range of 1–100Hz. Thus, the serpentine structure allows the sensor to detect not only planar excitation but also to respond multifunctionally to directional bending, pressure and vibration. Additionally, repeatability experiments of the sensor under different sensing characteristics verified the excellent stability and reliability of the sensor. Meanwhile, identification in different texture characteristics can be realized by this sensor. This work offers essential research value and practical significance for the sensor materials, novel structures and wearable applications of stretchable flexible sensors.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104029"},"PeriodicalIF":1.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of the compensation probe position on the value of the measured potential of a conducting object with constant charge","authors":"Adam Pelesz","doi":"10.1016/j.elstat.2024.104028","DOIUrl":"10.1016/j.elstat.2024.104028","url":null,"abstract":"<div><div>The article presents how the position of a compensation probe affects the measured potential of a conductive object with constant charge. This influence is usually difficult to predict and requires a numerical analysis. Simulations have been carried out to show to what extent a compensation probe can affect the potential of an object. It was shown that the location of the probe can noticeably affect the value of the measured potential of a conducting object with constant charge <em>Q</em>. Article also introduces the concept of an auxiliary surface <em>S</em><sub>pu</sub> that can assist in identifying the optimal placement of the probe.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104028"},"PeriodicalIF":1.9,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of polarity reversal on interfacial charge formation in multilayer dielectric insulation","authors":"Fatiha Rogti","doi":"10.1016/j.elstat.2024.104015","DOIUrl":"10.1016/j.elstat.2024.104015","url":null,"abstract":"<div><div>In this paper, the effect of the polarity on the formation of the interfacial charge between two dielectrics has been investigated. A sandwich structure constituted by two dielectric films Polyethylene (LDPE) and Fluorinated Ethylene Propylene (FEP) was subjected to high DC electric field, and the measurement were performed in case of polarization and depolarization. For reversed polarity effect, the experimental results show that the space charge profiles measured at different voltage polarities are not symmetrical, in particular, has observed the following behavior in dielectric interface configuration Cathode (Al)/LDPE/FEP/Anode (SC) under a positive polarity: negative charge accumulates at the dielectric interface LDPE/FEP.</div><div>The anode configuration (Al)/LDPE/FEP/Cathode (SC) under a negative polaritys: a positive charge accumulates at the dielectric interface LDPE/FEP.</div><div>For the same dielectric inversion of polarization does not give the same amount of interfacial charge, because the quantities of positive interfacial charges (holes) and negative (electrons) depend on the injection electrode (Al). The existence of the interfacial charge is positive or negative.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104015"},"PeriodicalIF":1.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mitigating particle-electrode collision in electrostatic separators: A segmented electrode approach","authors":"Kimi Imad Eddine , Seddik Touhami , Benhammou Aissa , Lahcen Azzedine , Tilmatine Amar","doi":"10.1016/j.elstat.2024.104027","DOIUrl":"10.1016/j.elstat.2024.104027","url":null,"abstract":"<div><div>Driven by recent progress in electrostatic separation techniques, there is growing interest in their industrial applications, particularly for waste recycling processes. This study investigates the effectiveness of two electrostatic separator configurations, with a particular focus on mitigating particle-electrode collisions, a significant challenge in conventional designs. To address this limitation, a novel segmented electrode configuration is proposed to improve particle sorting efficiency while minimizing collision events. The separation performance has been assessed through a numerical model, with the inclination angles of the electrodes held constant. A final verification of the model has been carried out using a high-speed camera. The Matlab-based numerical model accurately predicts experimental results, validating its suitability for further optimization studies. The results demonstrate the elimination of the charge/mass ratio limitations reported in previous studies, and highlight that electrodes segmentation significantly improves the particles’ deflection with more than <span><math><mrow><mn>38</mn></mrow></math></span> % for the final position with same initial conditions.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104027"},"PeriodicalIF":1.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation on the transient solution for electrohydrodynamic deformation of droplets in a combined DC electric field and shear flow field","authors":"Tahereh Asadollahi, Nadereh Golshan Ebrahimi","doi":"10.1016/j.elstat.2024.104010","DOIUrl":"10.1016/j.elstat.2024.104010","url":null,"abstract":"<div><div>In this article, we endeavor to analytically analyze the transient deformation and orientation of a droplet in a combined DC electric field and shear flow field. Throughout the analysis, the droplet's shape was assumed to be spheroidal. By incorporating stress balances, boundary conditions, and motion equations, we modeled the droplet's behavior, formulating its elongation and rotation separately. The droplet's rotation was assumed to be the linear sum of electric and shear rotations. However, our findings, derived from the developed MATLAB program, revealed that the linear summation of rotations does not hold.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104010"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrostatic surface potential stability of corona charged PTFE electret films by some parametric optimization for radiation protection dosimetry","authors":"Sahel Rabiee, Mehdi Sohrabi, Hossein Afarideh","doi":"10.1016/j.elstat.2024.104013","DOIUrl":"10.1016/j.elstat.2024.104013","url":null,"abstract":"<div><div>The effects of Polytetrafluoroethylene (PTFE) thickness, charging temperature, and annealing treatments on electrostatic surface potential (ESP) stability and charge decay mechanism of corona charged PTFE electret films studied. The ESP stability were studied by isothermal surface potential decay at 90 ± 1 °C. The initial surface potential was found proportional to thickness, charging conditions, and annealing treatments. Annealing treatments before and after the charging process at 220 ± 1 °C enhanced the ESP stability of electret films by 20–25 % under room environmental conditions. Upon improving the ESP stability of PTFE electret films, electret dosimeters with different sensitivity ranges and practical performance have been produced.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104013"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of high voltage and electrode configuration on the trajectories of metallic particles in roll-type electrostatic separators for granular mixtures","authors":"Hakim Moulai , Thami Zeghloul , Noureddine Menad , Lucian Dascalescu","doi":"10.1016/j.elstat.2024.104014","DOIUrl":"10.1016/j.elstat.2024.104014","url":null,"abstract":"<div><div>Electrostatic separation is a technique that uses electric field forces exerted on charged or polarized bodies for sorting the constituents of granular mixtures in various domains: minerals beneficiation, food processing, waste recycling, etc. In the case of the specific electrostatic separator that is the subject of this study, the electric field is generated between a rotating-roll electrode, connected to the ground, and a static electrode with inverted S profile connected to a high voltage (HV) supply. This paper is aimed at evaluating the effect of two factors: the high voltage applied between the two electrodes and the distance between them. A high-speed video camera was used to record the trajectories of mm-sized aluminum and copper particles. The visualization of these trajectories provided a better understanding of the dynamics of particles movement in the electric field of the separator. It enabled to adjust the applied high voltage and the inter-electrode distance to avoid the impacts between the fine aluminum particles and the static electrode, while driving the two types of metallic particles into different collecting compartments. The conclusions of the study will be implemented on a pilot-plant roll-type electrostatic separator integrated to the production line of an industrial recycler.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104014"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bing-Yang Shih , Senne Fransen , Edmondo Valvo , Kherim Willems , Willem Van Roy , Pol Van Dorpe , Maarten Rosmeulen
{"title":"Not only dielectrophoresis: The crucial role of electrokinetic phenomena in a dielectric particle’s response to an oscillating electric field","authors":"Bing-Yang Shih , Senne Fransen , Edmondo Valvo , Kherim Willems , Willem Van Roy , Pol Van Dorpe , Maarten Rosmeulen","doi":"10.1016/j.elstat.2024.104009","DOIUrl":"10.1016/j.elstat.2024.104009","url":null,"abstract":"<div><div>Dielectrophoresis (DEP) is frequently analyzed in terms of a particle’s effective dipole moment (EDM). However, in a non-uniform oscillating electric field there are other electrokinetic (EK) phenomena, such as induced-charge electrophoresis (ICEP) and higher order corrections to electrophoresis (EP) that contribute to the particle’s time-averaged motion. We analyze the situation for a highly charged dielectric particle with a thick electric double layer for a general non-uniform external field. By applying perturbation theory consistently to the second-order in terms of the external electric field’s strength, we show that the Maxwell stress tensor (MST) evaluated on the particle’s surface naturally includes both DEP and EK effects, whereas the EDM approach only yields the DEP contribution. Notably, when the MST is calculated in the neutral and uniform far field, as opposed to the particle’s surface, this yields only the DEP contribution as given by the EDM. Importantly, electrokinetic phenomena are significant for highly charged dielectric particles and may even dominate the dielectrophoretic response at low frequencies. Under these conditions, the Clausius–Mossotti factor can be a misleading parameter to predict whether a particle is attracted to, or repelled from, regions with a high electric field strength.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104009"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Inductive charging – An invisible Menace","authors":"David E. Swenson","doi":"10.1016/j.elstat.2024.104012","DOIUrl":"10.1016/j.elstat.2024.104012","url":null,"abstract":"<div><div>Inductive charging is the natural phenomenon where an isolated conductive object attains a net electrostatic charge when grounded in the presence of an electric field. The act of grounding the object results in a spark discharge between the conductive object and ground. The resulting charged object, if it remains isolated, will hold the charge until grounded again, resulting in a second spark discharge of opposite polarity to the initial electric field.</div><div>Inductive charging and resulting discharges have caused one significant and one minor fire in a US military pyrotechnic facility. Experiments have duplicated the accident conditions for both incidents to provide evidence that inductive charging caused the incidents.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104012"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of chucking force distribution according to substrate pattern and deformation characteristics of electrostatic chuck for deposition","authors":"Seong Bin Kim , Ju Hye Kim , Dong Kyun Min","doi":"10.1016/j.elstat.2024.104008","DOIUrl":"10.1016/j.elstat.2024.104008","url":null,"abstract":"<div><div>An electrostatic chuck is a device used for the force between charges applied between two parallel plates to attract and secure substrates, such as wafers or OLED panels. Unlike mechanical adhesion methods, which rely on physical fixation, this method uses electrostatic forces for adhesion, making it crucial to verify the chucking force. As the size of the substrate increased, deformation due to gravity or the chucking force also increased, and the chucking force decreased sharply as the distance between the chuck and the substrate increased. This distance between the chuck and the substrate is represented by an Air Gap. With the trend of displays shifting from small to large OLEDs, the consideration of substrate deformation has become necessary. In this study, to verify substrate deformation through various patterns, a simplified 2D model using Maxwell, an electromagnetic field analysis program, and Mechanical, a static structural analysis program, both by Ansys, was utilized to observe changes in adhesive force. Additionally, 3D modeling was applied to verify the adhesive force and deformation according to the voltage and size of various patterns.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104008"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}