Polymer tribo-electric charging: dependence on thermodynamic surface properties and relative humidity

Németh, Ernő; Albrecht, Victoria; Schubert, Gert; Simon, Frank

doi:10.1016/s0304-3886(02)00137-7

Cited by 157 publications

(104 citation statements)

References 26 publications

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“…The surface charge of the charged particles decreases probably due to the discharge of the electrons through the moisture layer attached on the surface. 14) At high humidity, break down of electrodes can occur because the potentials of electrodes are discharged into air due to ionization.…”

Section: Effect Of Relative Humiditymentioning

confidence: 99%

Separation of Covering Plastics from Particulate Copper in Cable Wastes by Induction Electrostatic Separation

2015

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A plate-type induction-electrostatic separator unit has been designed and assembled to study the removal of particulate copper from cable scrap which contains plastics for recycling. From test results, a copper rejection of 99.95% and plastics recovery of 98.8% could be successfully achieved under conditions of over an 437.5 V/cm electric field, relative humidity of less than 35%, and a splitter position of 4 cm horizontal distance and 25 cm vertical distance. A relationship to predict the recovery of plastics has been developed through regression analysis based on factors identified by analyzing free falling trajectories of particles under gravity and electrostatic attractions.

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Section: Effect Of Relative Humiditymentioning

confidence: 99%

Separation of Covering Plastics from Particulate Copper in Cable Wastes by Induction Electrostatic Separation

2015

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“…Thus, the above two items for estimating different process variables in triboelectrostatic separation of plastics were used, and in addition, assessment of a function as splitter position among different variables utilized Newton's separation efficiency 25) ( n ) together with grade and recovery. A main target material in this work is PP in net frame plastics and PP grade is the content of PP material in the product fraction, and its recovery and n in the following: Triboelectrostatic Separation for Recycling of Seaweed-Drying Net Frame Plastic Wastes…”

Section: Estimation Of Degree Of the Separationmentioning

confidence: 99%

“…15,18) This separation method can improve the separation efficiency by establishing a triboelectric series and developing a charger material and charger type [19][20][21][22][23] such as cyclone, vibrating feeder, fluidized bed, inclined rotating drum, honeycomb and spiral tube charger, and appropriate handling technique for the various charging factors. [24][25][26] This work aims at developing a reliable and relatively inexpensive technology for the effective triboelectrostatic separation of PP and ABS, based on the control of the charge polarity and charge-to-mass ratio of those particles. Particularly, our study is focused on estimating process variables such as charger material, air velocity, electrode potential, splitter position and relative humidity that affect the separation efficiency of plastics.…”

Section: Introductionmentioning

confidence: 99%

Triboelectrostatic Separation for Recycling of Seaweed-Drying Net Frame Plastic Wastes

Park

Jeon

2009

Mater. Trans.

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In this research, on the basis of the control of electrostatic charge, a laboratory-scale triboelectrostatic separation for separating polypropylene (PP) and acrylonitrile-butadiene-styrene (ABS) in seaweed-drying net frame plastic wastes has been carried out. High density polyethylene (HDPE) in a charger material selection tests using a vertical-reciprocation system was found to be the most effective materials for a tribo-charger in the separation of PP, and ABS. In lab-scale triboelectrostatic separation tests using the HDPE pipeline charger, the charge-tomass ratio (nC/g) of the mixed PP and ABS increased when the air velocity was adjusted to over 10 m/s. The optimum splitter position estimated by Newton's separation efficiency ( n ) was a position +4 cm from the central. Furthermore, under the conditions of over 385 kV/m electric field and less than 30% relative humidity, a PP grade of 99.70% and a recovery of 92.30% could be obtained.

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“…To determine the effectiveness of "chargeability", for all types charging used the other samples of material non-metallic [14]. On the neutral material non-metallic density of a charges induced related is equals zero.…”

Section: Introductionmentioning

confidence: 99%

Charging of Materials Non-Metallic Used in Underground Mines Endangered by Firedamp and/or Coal Dust

Wiechuła¹

2013

OJINM

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The expansion parts and components of non-metallic in devices have become a fait accompli. In the case parts, components of non-metallic are used in atmospheres explosive and may be a potential source of ignition [1]. Ignition hazards due to static electricity from the charged non-conductive non-metallic materials are well known [2]. The prevalence protection metal parts and components of anti-corrosion exist in any device equipped with a metal casing. Inherent risks associated services are caused by static electricity. Electrostatic phenomena arise in many situations, in a variety of environments and industries. The occurrence of charge static in many cases unexpected is unwanted and requires the use of expensive preventive measures. Brush discharge and propagating brush discharge (e.g. composite coating about non-conductive electrostatic properties of an isolated base conductive) create explosion hazard in underground endangered by firedamp and/or coal dust [3].

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Polymer tribo-electric charging: dependence on thermodynamic surface properties and relative humidity

Cited by 157 publications

References 26 publications

Separation of Covering Plastics from Particulate Copper in Cable Wastes by Induction Electrostatic Separation

Separation of Covering Plastics from Particulate Copper in Cable Wastes by Induction Electrostatic Separation

Triboelectrostatic Separation for Recycling of Seaweed-Drying Net Frame Plastic Wastes

Charging of Materials Non-Metallic Used in Underground Mines Endangered by Firedamp and/or Coal Dust

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