Journal of Electrostatics最新文献_第2页

Recent advances in the electrostatic separation of particulate matter

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-02-07 DOI: 10.1016/j.elstat.2025.104036

Lucian Dascalescu , Thami Zeghloul , Karim Medles , Alexandru Iuga

{"title":"Recent advances in the electrostatic separation of particulate matter","authors":"Lucian Dascalescu , Thami Zeghloul , Karim Medles , Alexandru Iuga","doi":"10.1016/j.elstat.2025.104036","DOIUrl":"10.1016/j.elstat.2025.104036","url":null,"abstract":"<div><div>Since the middle of the last century, the electrostatic separation imposed itself as a standard technology in mineral beneficiation. During the last 40 years, it has been more and more widely applied for the recycling of valuable materials (metals, plastics) from industrial wastes. The present paper was aimed to review several recent solutions developed by the authors to surpass several major technical challenges: (i) push the limits of the existing electrostatic separation applications in the recycling industry, in terms of hourly throughput, recovery and purity of the products; (ii) process more complex granular or powdery mixtures, including brominated plastics, and flake-like materials; (iii) recover textile fibers from shredded waste. Described in this short review are: (i) a newly patented modular multi-functional electrostatic separator; (ii) an original procedure for the tribo-electrostatic separation of ternary mixtures of plastics containing brominated flame retardants; (iii) a modified industrial installation for the tribo-electrostatic separation of polyethylene and polystyrene flakes from packaging waste; (iv) a patent-pending equipment for the recovery of PET fibers from end-of-life tires. Research should continue to expand the application of the electrostatic separation in at least the following areas: (i) recycling of composite materials; (ii) recovery of fine powders in food and pharmaceutical industry; (iii) extracting high-value metals from micronized waste electric and electronic equipment.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104036"},"PeriodicalIF":1.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463577","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}

引用次数: 0

The influence of barrier discharge by microplasma drug delivery system probe on cell viability and intracellular drug absorption

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-02-07 DOI: 10.1016/j.elstat.2025.104040

Abubakar Hamza Sadiq , Jaroslav Kristof , Md Jahangir Alam , Sadia Afrin Rimi , Yoshinori Mizuno , Takumi Okada , Kazuo Shimizu

{"title":"The influence of barrier discharge by microplasma drug delivery system probe on cell viability and intracellular drug absorption","authors":"Abubakar Hamza Sadiq , Jaroslav Kristof , Md Jahangir Alam , Sadia Afrin Rimi , Yoshinori Mizuno , Takumi Okada , Kazuo Shimizu","doi":"10.1016/j.elstat.2025.104040","DOIUrl":"10.1016/j.elstat.2025.104040","url":null,"abstract":"<div><div>One of plasma medicines greatest accomplishments is the non-invasive drug delivery to cells, tissue, and small animals. Little to no reports has been recorded for intranasal drug delivery with air microplasma at atmospheric condition. This study presents a new design of dielectric barrier discharge microplasma referred to microplasma drug delivery system (DDS) probe for delivery of high molecular weight into DBC1.2 cell line. It is designed by winding a thin wire electrode (ground) around another thin wire electrode (high voltage) coated with a dielectric material. At room condition, the discharge characteristics of this reactor is investigated by activating the peak-to-peak voltage sine waveform. The frequent discharge current affects the dominance of the plasma discharge. The discharge power when the probe is activated at 2 kV, 3 kV, 4 kV, is evaluated, along with its impact on pH of the culture medium, ozone concentration and hydroxyl radicals generated in the medium. Furthermore, the impact of the discharge on cellular processes like growth and viability is accessed alone and during the delivery of FD-70 and FD-150 (MW:70 kDa and 150 kDa) through the intracellular membrane of the cell line. A high delivery of drug was observed in 3 kV and 4 kV discharge voltage. The highest delivery was recorded in 4 kV while 2 kV had similar drug uptake as control. The result of cell growth and viability suggests that the discharge does not show negative impact but rather within the concentration that regulate cellular processes leading to drug permeation and cell growth.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104040"},"PeriodicalIF":1.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348209","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}

引用次数: 0

Influence of droplet charge on spray painting with a high-speed rotary bell

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-02-06 DOI: 10.1016/j.elstat.2025.104042

Q. Ye , O. Tiedje , J. Domnick

{"title":"Influence of droplet charge on spray painting with a high-speed rotary bell","authors":"Q. Ye , O. Tiedje , J. Domnick","doi":"10.1016/j.elstat.2025.104042","DOIUrl":"10.1016/j.elstat.2025.104042","url":null,"abstract":"<div><div>Numerical simulations of the spray coating process with an electrostatically supported high-speed rotary bell with internal charging were carried out, focusing on the effects of droplet charge on the spray formation, the film thickness distribution on the target and the transfer efficiency. From simulation results of the electrohydrodynamics (EHD) atomization process close to the bell edge, droplet size-to-charge relationships and initial droplet velocities were derived and used in the present coating simulation. Three different droplet charge models were applied and the resulting electric fields were analysed. It was found that the droplet size-to-charge relationship plays an important role for the spray-painting performance. Despite a relatively low influence of the charging model on the transfer efficiencies (TE), varying between 89 % and 94 % at an experimental TE of 94 %, significantly different film thickness distributions on the target were found. The best agreement between measured and simulated film thickness distributions was obtained using the proportionality between charge and droplet volume as indicated by the EHD-breakup simulations. Furthermore, effects of the initial droplet positions and velocities were analysed, comparing simulative and experimental results with respect to film thickness distributions on the target and droplet velocity profiles downstream the bell.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104042"},"PeriodicalIF":1.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143209695","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}

引用次数: 0

Comparison and calibration of four instruments for the measurement of electric potential at the surface of non-planar bodies

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-02-03 DOI: 10.1016/j.elstat.2025.104041

Nesrine Amiour, Thami Zeghloul, Mohamed Sofiane Bendilmi, Lucian Dascalescu

{"title":"Comparison and calibration of four instruments for the measurement of electric potential at the surface of non-planar bodies","authors":"Nesrine Amiour, Thami Zeghloul, Mohamed Sofiane Bendilmi, Lucian Dascalescu","doi":"10.1016/j.elstat.2025.104041","DOIUrl":"10.1016/j.elstat.2025.104041","url":null,"abstract":"<div><div>– The electric potential measurements carried out to assess the presence of electric charges at the surface of a body are affected by the geometry of the probe-target system. The present work was specifically aimed at formulating recommendations for the calibration of two non-contact voltmeters and two field-meters currently employed for monitoring the electric potential at the surface of non-planar bodies. The experiments involved the measurement of the electric potential at the surface of planar and cylindrical electrodes of various shapes and sizes, connected to a positive high-voltage supply of 1.5 kV. The readings of each instrument were analyzed in relation with the configuration of the electrodes. As the four instruments have been designed for monitoring the electric potential on relatively large planar surfaces (>100 cm<sup>2</sup>), specific calibration was needed for measurements on bodies having geometrical characteristics that differ from those specified by the manufacturers. The experiments have shown that the interpretation of the results should consider the fact that the accuracy of the measurements diminishes when the axis of the probe approaches the edges of the electrode. In the case of non-planar surfaces, the measured values should be corrected by coefficients that can be determined by experiments conducted in conditions that mimic the situations of practical interest.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104041"},"PeriodicalIF":1.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136271","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}

引用次数: 0

Design, development and performance evaluation of a miniature electrostatic precipitator in an indoor environment

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-31 DOI: 10.1016/j.elstat.2025.104038

Aiswarya Kumar , Prashant Nawale , Manoranjan Sahu

{"title":"Design, development and performance evaluation of a miniature electrostatic precipitator in an indoor environment","authors":"Aiswarya Kumar , Prashant Nawale , Manoranjan Sahu","doi":"10.1016/j.elstat.2025.104038","DOIUrl":"10.1016/j.elstat.2025.104038","url":null,"abstract":"<div><div>Indoor air quality is a major concern in the modern environment. Although various pollutants coexist indoors, particulate matter (PM) is a major health concern. Even though different PM capture technologies are available in market as well as on lab scale, they pose several drawbacks. It was in this regard that electrostatic precipitator (ESP), a widely preferred technology for industrial application but has yet to be explored to that extent in indoor environments could provide multiple benefits in latter. Therefore, a miniature single-wire, single-stage and wire-plate square cross-sectional ESP was designed in laboratory and operated at optimal operating conditions based on theoretical calculations, experimental results as well as computational fluid dynamics (CFD) modelling to obtain maximised capture of PM. Results from study confirmed that designed ESP was capable of capturing various standard aerosols such as sodium chloride, ammonium chloride and magnesium chloride with a total removal efficiency of 99.94 %–99.97 % in wide PM sizes from 10 nm to 800 nm. To simulate performance in a real scenario, experiments were also performed with major indoor PM sources like incense sticks, candle burning and mosquito coils having different particle number distributions and achieved a total PM capture efficiency of 99.24, 99.99 and 99.97 % respectively. Designed ESP also removed ambient air as well as infiltrated PM from outdoors with a total efficiency of 97.87 % and 99.74 % respectively. Additionally, energy consumed/clean air delivery rate (CADR) (0.32 W/(m³/hr)) and emission of by-products like ultrafine particles as well as nitrogen dioxide were found to be comparatively lesser compared to commercial purifiers suggesting its possible applicability in scaling up as an indoor air purifier.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104038"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136272","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}

引用次数: 0

Triboelectric generators: A comprehensive review of innovative energy solutions

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-30 DOI: 10.1016/j.elstat.2025.104037

Sneha Grover, Amanpreet Kour, Piyush Tailor, Dheeraj Minglani

引用次数: 0

Application study on one-dimensional partial element equivalent circuits to lightning current distribution on surface structure

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-28 DOI: 10.1016/j.elstat.2025.104032

Chen Tong , Yeyuan Huang , Xinping Li , Shanliang Qiu , Xiaoliang Si , Zemin Duan , Wei Yan , Ling Yao

引用次数: 0

Characterization and Optimization of Electrospun PVA/PLA Nanofibers Using Taguchi Method: Morphology and Structure

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-24 DOI: 10.1016/j.elstat.2025.104035

Reyhaneh Fatahian , Rasool Erfani

{"title":"Characterization and Optimization of Electrospun PVA/PLA Nanofibers Using Taguchi Method: Morphology and Structure","authors":"Reyhaneh Fatahian , Rasool Erfani","doi":"10.1016/j.elstat.2025.104035","DOIUrl":"10.1016/j.elstat.2025.104035","url":null,"abstract":"<div><div>The blending of poly(lactic acid) (PLA) with hydrophilic polymers such as poly(vinyl alcohol) (PVA) significantly enhances PLA's elasticity and water affinity, addressing its inherent fragility and hydrophobicity. These improvements render PLA/PVA blends highly suitable for advanced medical applications, including wound dressings. This study pioneers the systematic optimization of electrospinning parameters— applied voltage, flow rate, and needle-to-collector distance—to achieve uniform fibre morphology and desired structural characteristics in PLA/PVA nanofibers. Utilizing the Taguchi design of experiment (DOE) methodology, this research provides a comprehensive analysis of the effects of these parameters on the structure and diameter distribution of single-nozzle electrospun nanofibers. A novel aspect of this study is the exploration of a mutual solvent system for electrospinning these nanofibers, which has not been extensively investigated in existing literature. The findings reveal that flow rate is the most influential parameter, followed by applied voltage and needle-to-collector distance. Optimal electrospinning conditions—needle-to-collector distance of 18 cm, flow rate of 0.6 ml/h, and voltage of 18 kV—are identified, resulting in the smallest average fibre diameter and minimal variation. This work not only advances the field of nanofiber fabrication but also sets a new benchmark for the production of high-quality fibres with consistent properties. The insights gained from this study have far-reaching implications for biomedical applications, particularly in the development of effective wound dressing materials. Furthermore, the methodological innovations and theoretical contributions presented here have the potential to influence future research directions and policy decisions in the field of biomedical engineering, particularly in developing effective wound dressing materials, and offer potential insights for broader applications in tissue engineering and regenerative medicine.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104035"},"PeriodicalIF":1.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136275","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}

引用次数: 0

Effect of contaminant particles, temperature, and humidity on the dielectric strength of insulating oils

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-22 DOI: 10.1016/j.elstat.2025.104030

F. González, A. Retamoso, F. Cely, J. Lozano, O. Sánchez

{"title":"Effect of contaminant particles, temperature, and humidity on the dielectric strength of insulating oils","authors":"F. González, A. Retamoso, F. Cely, J. Lozano, O. Sánchez","doi":"10.1016/j.elstat.2025.104030","DOIUrl":"10.1016/j.elstat.2025.104030","url":null,"abstract":"<div><div>In this work, the behavior of the dielectric breakdown voltage of insulating oils concerning variations in temperature, humidity, and contaminant concentration was established. Tests used electrodes for flat, spherical, and Verband Deutscher Elektrotechniker (VDE) type. The influence of contaminant concentration (cellulose, iron, and copper), humidity, and temperature on the breakdown voltage of the oils was determined through a four-level experimental design. Data collected in the tests were analyzed using Analysis Of Variance (ANOVA). The experimental phase of the research was carried out in the High Voltage Laboratory of Unidades Tecnológicas de Santander. The most relevant results showed that the contaminant concentration is inversely related to the oil breakdown voltage, with copper being the material with the most significant influence on the study variable. Likewise, temperature is directly related to the breakdown voltage level, with the highest levels reached when the test is conducted at 90 °C. For the three types of electrodes used, it is shown that humidity has an inverse relationship with breakdown voltage. In all cases, the highest disruption values are achieved with a moisture of 5 ppm.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104030"},"PeriodicalIF":1.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136274","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}

引用次数: 0

A new device for monitoring deformation dynamics and droplet shrinkage kinetics (during drying) of a charged droplet suspended in air

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-20 DOI: 10.1016/j.elstat.2025.104033

A. Dokmak , T. Deleau , J.J. Letourneau , A. Maudhuit , P. Arlabosse , M.I. Ré

{"title":"A new device for monitoring deformation dynamics and droplet shrinkage kinetics (during drying) of a charged droplet suspended in air","authors":"A. Dokmak , T. Deleau , J.J. Letourneau , A. Maudhuit , P. Arlabosse , M.I. Ré","doi":"10.1016/j.elstat.2025.104033","DOIUrl":"10.1016/j.elstat.2025.104033","url":null,"abstract":"<div><div>In this study, a new device was developed to study the deformation kinetics of a pendant droplet under controlled drying conditions and in the presence of an electric field (EF). It has made it possible to investigate the deformation and air-drying kinetics of conductive and electrically charged pendant CuSO<sub>4</sub>.5H<sub>2</sub>O droplets. Various EF intensities (0–800 kV/m) and solid content concentrations (0–25 % wt/wt) are applied. Results show significant reduction (up to 42 %) in interfacial tension with increasing EF, along with a quadratic relationship between EF intensity and interfacial tension. Droplet surface area expansion and deformation are influenced by the EF intensity and the solution solids content. It has also been shown that, during drying, EF application can influence the deformation kinetics and shrinkage rate during the early drying stages, particularly at higher solid concentrations and high EF intensity, revealing new insights into droplet dynamics under EF.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104033"},"PeriodicalIF":1.9,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136273","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}

引用次数: 0