Surface potential decay characterization of non-woven electret filter media

Plopeanu, M.; Notingher, P.; Dumitran, Laurentiu Marius; Tabti, Belaïd; Antoniu, Angela; Dăscălescu, Lucian

doi:10.1109/tdei.2011.6032807

Cited by 30 publications

(16 citation statements)

References 23 publications

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“…The topics related to the lifetime of electric charge * E-mail: bozena.lowkis@pwr.edu.pl have been considered in numerous scientific publications. We believe that works [1][2][3][4][5][6][7][8] are particularly relevant to this field and useful to understand and model this phenomenon. In the literature [1], the electret lifetime was estimated based on the isothermal charge decay, the charge decay in nonisothermal conditions and the thermally stimulated current.…”

Section: Introductionmentioning

confidence: 99%

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Parameters characterizing the charge state of dielectrics

Lowkis

2017

Materials Science-Poland

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This paper presents three physical sources of the electric field in dielectrics: excess free volume charges with the distribution q v (x,y,z), free surface charges with the distribution q s (x,y,z) and frozen polarization state in the dielectric. They have a deciding influence on the parameters of the electret, in particular they determine the total lifetime of the electret and technical components made of it. The indeterminacy related to the mutual proportions of the spatial and surface charges was discussed: one can find an infinite number of distributions of surface q se (x,y,z) and spatial q ve (x,y,z) charges leading to the same distribution of the electric field E(x,y,z). A general case of electret was considered, where a coexistence of relaxation decay of frozen polarization and Maxwellian relaxation dependent on volume conductivity of the dielectric is assumed. An attempt to interpret the charge lifetime in real electrets was made.

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Section: Introductionmentioning

confidence: 99%

“…Plopeanu et al [7] describe the influence of several factors on the surface potential decay characteristics of the electret filter media. The results show that the surface charge decay is a function of the relative humidity, the temperature and the electric potential of the electrode grid.…”

Section: Introductionmentioning

confidence: 99%

Parameters characterizing the charge state of dielectrics

Lowkis

2017

Materials Science-Poland

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“…Filtration process is implemented in many applications including water purification, beneficiation of minerals, biotechnologies and chemical industries [1,2]. A filter medium is a pervious and flexible material through which a fluid (liquid, gases) flows through it such that the particles suspended in it is retained [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…A filter medium is a pervious and flexible material through which a fluid (liquid, gases) flows through it such that the particles suspended in it is retained [3,4]. The filters may be natural like cotton, wool or artificial like polyethylene, polyester [1,2]. So, filtration helps in preventing damage resulting from contamination, as well as in increasing the availability of the system which results in increasing productivity considerably.…”

Section: Introductionmentioning

confidence: 99%

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An Equivalent Electrode System for Efficient Charging of Filtration Media

Abouelatta

Salama

2016

IJEECS

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Electrically Activated Ultrathin PVDF‐TrFE Air Filter for High‐Efficiency PM_1.0 Filtration

Han

Lee

Kim

et al. 2019

Adv Funct Materials

111

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Ultrafine particulate matter (PM) in indoor air has become a serious concern for public health. Therefore, there is a growing interest in filters that can be installed on the window frames of ordinary homes to improve the indoor air quality by natural passive ventilation without using expensive forced air circulation systems. Thus, these filters require a high filtering efficiency and high air permeability and visibility, which do not compromise the original functionality of the windows. The filters developed for this purpose to date have demonstrated a high filtering efficiency for PM2.5 but a relatively low efficiency for PM1.0. Here, the performance of the ultrathin poly[(vinylidenefluoride‐co‐trifluoroethylene) (PVDF‐TrFE) nanofiber air filter capable of high‐efficiency PM1.0 filtration is reported. To enhance the PM1.0 filtering efficiency, the filter is electrically activated by the polarization of dipoles and triboelectrification using the ferroelectric nature and triboelectrically negative property of the PVDF‐TrFE filter layer. The electrically activated PVDF‐TrFE filter demonstrates a PM1.0 filtering efficiency of over ≈88% after polarization, which is further improved to ≈94% after triboelectrification. In addition, the filter is ultrathin and air‐permeable with 65% light transmittance. The methods introduced in this work can be adopted to develop high performance, highly visible, and air‐permeable filter media.

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Surface potential decay characterization of non-woven electret filter media

Cited by 30 publications

References 23 publications

Parameters characterizing the charge state of dielectrics

Parameters characterizing the charge state of dielectrics

An Equivalent Electrode System for Efficient Charging of Filtration Media

Electrically Activated Ultrathin PVDF‐TrFE Air Filter for High‐Efficiency PM_1.0 Filtration

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Surface potential decay characterization of non-woven electret filter media

Cited by 30 publications

References 23 publications

Parameters characterizing the charge state of dielectrics

Parameters characterizing the charge state of dielectrics

An Equivalent Electrode System for Efficient Charging of Filtration Media

Electrically Activated Ultrathin PVDF‐TrFE Air Filter for High‐Efficiency PM1.0 Filtration

Contact Info

Product

Resources

About

Electrically Activated Ultrathin PVDF‐TrFE Air Filter for High‐Efficiency PM_1.0 Filtration