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Spontaneous Electrostatic Precipitation of Dust.

Fowkes-FM; Hielscher-FH
NTIS: PB/222-850 Available for Reference At Bureau Libraries :48 pages
This report provides fundamental research information on the electrostatic behavior of coal mine dust. The results will be used to help determine whether a precipitator should be designed that would function by the spontaneous exchange of electric charge between coal mine dust and polymer surfaces. The following conclusions were reached: (1) electrification occurs upon contact of materials and rubbing is not required; (2) electrification occurs by electron injection and not by polarization of dipoles; (3) the direction of electron transfer depends on the electron-donor or electron-acceptor character of the outermost surfaces of the materials in contact; (4) some pairs of materials tansferred as many as 4 x 10-12 electrons/cm; (5) strong electrification of dusts took place in a fraction of a second, but weaker charge transfer took longer; (6) the transfer of charge between an insulated polymer surface and impinging dust particles diminishes as the surface charge builds up on the polymer; and (7) the charge transfer characteristics of polymers were modified by incorporating acidic or basic additives.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 55-73
NIOSH Division
Source Name
NTIS: PB/222-850; Available for Reference At Bureau Libraries
Performing Organization
Lehigh University
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division