Static Electrification of Filaments Theoretical Aspects1

Hersh, S. P.; Montgomery, D. J.

doi:10.1177/004051755602601201

Cited by 33 publications

(12 citation statements)

References 7 publications

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“…In the onedimensional approximation, taking the origin of coordinate x at the interface, where' is the dielectric constant and p(x) is the net charge density obtained from Equation 1 with appropriate use of the relations in Equation 4. In ' order to get the net charge density, the positive charge density of the atomic cores must be added to the electron charge density.…”

Section: Modelmentioning

confidence: 99%

“…Large charge is lost by the left-haod insulator from a small spatial region, and an equal charge is gained by the righthand material in a small spatial region. It is seen from the figures that the insulator on the right has a band structure identical with that of the insulator Applications H ersh and Nlontgomery [3) described the techniques and gave the results of an experimental study on the static electrification of filaments of various materials rubbed against one another, and in a subsequent paper [4) outlined the basis for a theory of the subject. Harper E2] described his work on the charge transferred when spheres of various materials are touched against one another, and gave a theoretical treatment to correlate the results for metal-metal contacts.…”

Section: Insulator-insulator Contactsmentioning

confidence: 99%

“…In such attempts [2,4] -the process of electrification is broken down into -two steps-the attainment of equilibrium charge distribution between the bodies -during contact and the counterflow of part of the charge during separation. The present pAper is .…”

Section: Introductionmentioning

confidence: 99%

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Charge Transfer Upon Contact Between Metals and Insulators

Ostenburg

Montgomery

1958

Textile Research Journal

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The equilibrium charge distribution between substances in contact is calculated in the one-dimensional approximation for metal-insulstor and insulator-insulator contacts. The direction of charge transfer is such as to equalize the Fermi levels, and the magnitude of charge transferred depends on the positions of the energy bands in the substances in contact. For example, in an insulator it is possible to have a large charge density (∼ 10 11 esu) within a thin layer (∼ 10 -8 cm.) or a small charge density (∼ 10 -1 esu) in a thick layer (∼ 10 -1 cm.), to give the same potential shift (∼ 1 ev), depending on the relative position of the bands. The energy levels in most insulators of high resistivities are too poorly known to allow strict quantitative comparison with experiment, but the results permit a semiquantitative explanation of some observations on static electrification.

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Section: Modelmentioning

confidence: 99%

Section: Insulator-insulator Contactsmentioning

confidence: 99%

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Charge Transfer Upon Contact Between Metals and Insulators

Ostenburg

Montgomery

1958

Textile Research Journal

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“…The above is of course a very simple approach to the phenomenon of static electrification. A more complete description of the whole process can be found in [4][5][6][7]. In fluidization processes and granular flow systems, triboelectrification is inevitable due to the continuous and random motion of particles which results in numerous collisions, friction and rolling between particles and particles, particles and fluid, or particles and wall to occur constantly.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Electrostatic Charge Generation for Granules

Zhou

Yin

et al. 2015

Procedia Engineering

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In studies of granule electrification due to sliding, quantitatively evaluating the charging characteristic of single particles, rather than of a mass of granules as a group, is important for a fundamental understanding of the elementary tribocharging phenomenon, which is complicated, since it is resulted from electrical and physical properties of granules and operational environment conditions. In this work, charge transfer due to a single particle repeated sliding along metal plane for Polyvinyl Chloride(PVC)granules(diameter 1.1-4.1 mm, in the shape of halfcircle or rectangle). The amount of transferred charge is expressed as a function of granular shape factor, such as length-ratio, sliding area, front-facing edge, as well as sliding velocity, plane angle and relative humidity. The transferred charge increases with length-ratio and area. Front-facing edge, plane angle, sliding velocity and relative humidity do have effect on the degree of electrification.

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“…The amount of charge generated depends not only on the atmospheric conditions but also on the substances being rubbed and the degree of rubbing (Ramer andRichards, 1968: Hersh andMontgomery, 1956). In cold regions such as Alberta, Canada, the absolute-humidity level declines to almost zero with very cold temperatures, so the electrostatic threat can be more significant than in warmer regions.…”

Section: Introductionmentioning

confidence: 99%

A Laboratory Protocol to Assess the Electrostatic Propensity of Protective-clothing Systems

González

Rizvi

Crown

et al. 2001

Journal of the Textile Institute

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The ability to predict the electrostatic propensity of textile systems has been an elusive goal for many years. Some small-scale test methods previously reported were found to be inadequate for certain conditions. One of the most serious problems is poor correlation between test measurements and the values of electrostatic discharges from a clothed person in real-life situations.This paper describes the development of a laboratory protocol to evaluate the electrostatic properties of clothing sy.stems. Four small-scale tests were evaluated and compared in order to select a protocol that could best assess the static propensity of protective-garment systems worn by workers in hazardous environments under dry conditions. Several two-layer fabric systems that included non-FR (non-fire-retardant) cotton, as well as thermal-protective fabrics of aramid fibre/carbon, aramid fibre/PBI (polybenzimidazole) fibre, aramid fibre/FR viscose, and FR cotton, were tested. Experiments were conducted at room temperature and 0% and 20% relative humidity (r.h.). Fabrics were evaluated in terms of both peak discharge potentials and charge decay. These peak potentials and charge decays were compared with data from human-body experiments, and significant coefUcients of determination (/f') of up to 0.99 were found when results from difTerent tests were regressed on human-body data.It therefore .seems that measuring peak discharge potentials and charge decays from charged-fabric .systems and peak discharge potentials from a capacitor hy using a battery of test methods can be sufficient to assess, with high accuracy, the static behaviour of garment systems in real-life conditions.

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Static Electrification of Filaments Theoretical Aspects1

Cited by 33 publications

References 7 publications

Charge Transfer Upon Contact Between Metals and Insulators

Charge Transfer Upon Contact Between Metals and Insulators

Experimental Investigation of Electrostatic Charge Generation for Granules

A Laboratory Protocol to Assess the Electrostatic Propensity of Protective-clothing Systems

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