Some aspects of the polymers' electrostatic charging effects

Albrecht, Victoria; Janke, Andreas; Németh, Ernő; Spange, Stefan; Schubert, Gert; Simon, Frank

doi:10.1016/j.elstat.2008.10.002

Cited by 41 publications

(28 citation statements)

References 19 publications

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“…Increased net contact charge for increased RH has been observed previously for glass beads contacting aluminum oxide substrates; 10 ionic polymers; 27 PE, PVC, and polystyrene granules charged by self-contact; 5,53 and polystyrene substrates charged by metallic spheres. 65 SPD of tribocharged surfaces has also been studied on PE, PTFE, and PET contacted by a bead of mercury and on PTFE, nylon, and aluminum rubbed with paper.…”

Section: B Related Literature Resultsmentioning

confidence: 73%

“…42,66 Oppositely charged domains on the surface of poly(oxymethylene), which are stable in time, were reported in Ref. 53.…”

Section: B Related Literature Resultsmentioning

confidence: 99%

“…52,53 Thus, bipolar charging has been observed repeatedly for many different material combinations and seems to be the norm rather than the exception for frictional electrification. Pronounced bipolar charging on a microscopic scale is likely one of the reasons the integral amount of triboelectric surface charges (the net charge) has generally been found to fluctuate strongly.…”

Section: B Related Literature Resultsmentioning

confidence: 99%

“…Interestingly, the rapid increase in SP seen for RH > 50% (compare also to Ref. 53) occurs at approximately the humidity threshold at which water adsorbed on hydrophobic surfaces has been reported to change its character by an increased average number of H-bonds per H 2 O molecule. 71,72 This coincidence may signify that adsorbed water with a character more like bulk liquid water, such as water adsorbed on hydrophilic surfaces, is more efficient in generating high triboelectric charging densities than water with a character more like ice, such as water clusters adsorbed on hydrophobic surfaces at low RH.…”

Section: B Water As a Source Of Triboelectric Chargementioning

confidence: 99%

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Squeezing out hydrated protons: low-frictional-energy triboelectric insulator charging on a microscopic scale

Knorr¹

2011

AIP Advances

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Though triboelectric charging of insulators is common, neither its mechanism nor the nature of the charge is well known. Most research has focused on the integral amount of charge transferred between two materials upon contact, establishing, e.g., a triboelectric series. Here, the charge distribution of tracks on insulating polymer films rubbed by polymer-covered pointed swabs is investigated in high resolution by Kelvin probe force microscopy. Pronounced bipolar charging was observed for all nine rubbing combinations of three different polymers, with absolute surface potentials of up to several volts distributed in streaks along the rubbing direction and varying in polarity on μm-length scales perpendicular to the rubbing direction. Charge densities increased considerably for rubbing in higher relative humidity, for higher rubbing loads, and for more hydrophilic polymers. The ends of rubbed tracks had positively charged rims. Surface potential decay with time was strongly accelerated in increased humidity, particularly for polymers with high water permeability. Based on these observations, a mechanism is proposed of triboelectrification by extrusions of prevalently hydrated protons, stemming from adsorbed and dissociated water, along pressure gradients on the surface by the mechanical action of the swab. The validity of this mechanism is supported by explanations given recently in the literature for positive streaming currents of water at polymer surfaces and by reports of negative charging of insulators tapped by accelerated water droplets and of potential built up between the front and the back of a rubbing piece, observations already made in the 19th century. For more brittle polymers, strongly negatively charged microscopic abrasive particles were frequently observed on the rubbed tracks. The negative charge of those particles is presumably due in part to triboemission of electrons by polymer chain scission, forming radicals and negatively charged ions

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Section: B Related Literature Resultsmentioning

confidence: 73%

“…42,66 Oppositely charged domains on the surface of poly(oxymethylene), which are stable in time, were reported in Ref. 53.…”

Section: B Related Literature Resultsmentioning

confidence: 99%

Section: B Related Literature Resultsmentioning

confidence: 99%

Section: B Water As a Source Of Triboelectric Chargementioning

confidence: 99%

See 2 more Smart Citations

Squeezing out hydrated protons: low-frictional-energy triboelectric insulator charging on a microscopic scale

Knorr¹

2011

AIP Advances

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show abstract

“…Whereas mass transport was proved experimentally [44,81,82], it was even suggested that material transfer accompanies every contact event. Also, more than one mechanism of charge transport should probably be taken into account during a single triboelectrification process [57,61,66,79,83,84]. For polymers and organic materials, material transfer or ion exchange is responsible for the generation of surface charges.…”

Section: Triboelectric Series and Chargetransfer Mechanismsmentioning

confidence: 99%