Characterization of tribocharging properties of powder paint

Mazumder, Malay K.; Banerjee, S.; Ware, R.E.; Mu, C.; Kaya, Nusret; Huang, Chia Chang

doi:10.1109/28.287522

Cited by 20 publications

(6 citation statements)

References 6 publications

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“…It has been regarded as detrimental problems in a numbers of situations such as electronic circuits and systems, which thus attract extensive efforts to alleviate this effect . On the other hand, this effect has also been utilized for different purposes such as painting, , particle separation, and mechanical energy harvesting, , the last of which uses contact electric charges as electrostatic induction sources to generate electricity from mechanical energy in the form of impact, , sliding, − rotation, and so forth. For the sake of better performances in these applications, higher density of charges transferred in the contact electrification process is always favorable. , Therefore, in all of the studies and applications related to the contact electrification, control of this effect is a critical issue.…”

Section: Results and Discussionmentioning

confidence: 99%

Manipulating Nanoscale Contact Electrification by an Applied Electric Field

et al. 2014

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Contact electrification is about the charge transfer between the surfaces of two materials in a contactseparation process. This effect has been widely utilized in particle separation and energy harvesting, where the charge transfer is preferred to be maximized. However, this effect is always undesirable in some areas such as electronic circuit systems due to the damage from the accumulated electrostatic charges. Herein, we introduced an approach to purposely manipulate the contact electrification process both in polarity and magnitude of the charge transfer through an applied electric field between two materials. Theoretical modeling and the corresponding experiments for controlling the charge transfer between a Pt coated atomic force microscopy tip and Parylene film have been demonstrated. The modulation effect of the electric field on contact electrification is enhanced for a thinner dielectric layer. This work can potentially be utilized to enhance the output performance of energy harvesting devices or nullify contact electric charge transfer in applications where this effect is undesirable. KEYWORDS: Contact electrification, atomic force microscopy, scanning Kelvin probe microscopy, nanogenerators C ontact electrification is a universally existing phenomenon of the charge transfer between surfaces of two materials in a contact-separation process. 1 It has been regarded as detrimental problems in a numbers of situations such as electronic circuits and systems, which thus attract extensive efforts to alleviate this effect. 2 On the other hand, this effect has also been utilized for different purposes such as painting, 3,4 particle separation, 5 and mechanical energy harvesting, 6,7 the last of which uses contact electric charges as electrostatic induction sources to generate electricity from mechanical energy in the form of impact, 8,9 sliding, 10−12 rotation, 13 and so forth. For the sake of better performances in these applications, higher density of charges transferred in the contact electrification process is always favorable. 14,15 Therefore, in all of the studies and applications related to the contact electrification, control of this effect is a critical issue. Previously, the modulation of contact-electric charge density was realized through intrinsic approaches such as material selection 16,17 and surface functionalization 18−20 that directly changes the structure of the two surfaces that are in contact. However, these methodologies are sometimes largely limited by the feasibility of material choices in some applications. So far, there have been few reports about the extrinsic method that can control charge transfer at insulator surfaces within preset materials. Using our recently developed atomic force microscopy (AFM) based in situ triboelectric characterization method, 21 it is possible to investigate extrinsic approaches that can modulate the contact electrification process, which can be potentially utilized to enhance the output performance of energy harvesting devices or nullify the co...

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Section: Results and Discussionmentioning

confidence: 99%

Manipulating Nanoscale Contact Electrification by an Applied Electric Field

et al. 2014

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“…Depending on the height of the energy levels charge carriers are accepted or donated from the metal surface. However, the effect has been regarded as one of the factors for undesirable power dissipation in electronic circuits, but recent ideologists in materials science are studying this outcome in contextual applications like painting 8 9 , particle separation 10 11 12 , polymerizations 13 14 15 , sensors 16 mechano-electrical data storage and energy harvesting 17 18 19 etc. Contact electrification can be classified according to the type of the solid surfaces involved: metal-metal, metal-insulator and metal-semiconductor system.…”

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confidence: 99%

Stress Induced Mechano-electrical Writing-Reading of Polymer Film Powered by Contact Electrification Mechanism

Goswami

Nandy

Calmeiro

et al. 2016

Sci Rep

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Mechano-electrical writing and reading in polyaniline (PANI) thin film are demonstrated via metal-polymer contact electrification mechanism (CEM). An innovative conception for a non-destructive self-powered writable-readable data sheet is presented which can pave the way towards new type of stress induced current harvesting devices. A localized forced deformation of the interface has been enacted by pressing the atomic force microscopic probe against the polymer surface, allowing charge transfer between materials interfaces. The process yields a well-defined charge pattern by transmuting mechanical stress in to readable information. The average of output current increment has been influenced from 0.5 nA to 15 nA for the applied force of 2 nN to 14 nN instead of electrical bias. These results underscore the importance of stress-induced current harvesting mechanism and could be scaled up for charge patterning of polymer surface to writable-readable data sheet. Time evolutional current distribution (TECD) study of the stress-induced patterned PANI surface shows the response of readability of the recorded data with time.

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“…Charge to mass ratio establishes the effectiveness of electrostatic forces working against the gravitational and aerodynamic forces in delivering the charged powder to the substrate (Taylor and Lawrence 1985). As particle size decreases, the charge to mass ratio increases (Bailey 1998, Mazumder and others 1994) and smaller particles are therefore more influenced by electrostatic forces. Consequently, TE improvement attributable to electrostatics is greatest for small and easily charged particles.…”

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confidence: 99%

“…With electrostatic charging, larger particles attain a higher total charge than smaller particles, but the charge to mass ratio decreases with increasing aerodynamic diameter for both corona (Bailey 1998) and triboelectric (Mazumder and others 1994) charging. Since electrostatic adhesive forces increase with increasing charge to mass ratio, (Stötzel and others 1997), smaller particles experienced improved adhesion to the substrate.…”

mentioning

confidence: 99%

“…Accordingly, the particles charged with the corona system should have stronger adhesion than triboelectrically charged powder due to the effect of ionic charge and electrostatic force compression. Among the particles charged triboelectrically, the highest charge to mass values, and so greatest electrostatic forces, should be small particles (Bailey 1998; Mazumder and others 1994), and those particles charged with teflon rather than nylon (Hughes 1989; Banerjee and Law 1998). These highly charged particles should experience higher forces of adhesion.…”

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confidence: 99%

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Corona Compared with Triboelectric Charging for Electrostatic Powder Coating

Mayr¹,

Barringer²

2006

Journal of Food Science

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The purpose of this research was to compare electrostatic and nonelectrostatic coating and determine the improvement between corona and triboelectric charging systems. Graham crackers were coated with food powder at 0, −50, or −95 kV or by tribocharging with teflon or nylon. Five sizes of sucrose from 13 to 138 μm were coated onto the crackers to determine the effect of particle size on coating efficiency. Three proteins, three carbohydrates, and one salt between 35 and 58 μm were analyzed to determine the effect of composition. Electrostatics improved transfer efficiency (TE) up to 27%, adhesion up to 40%, and reduced dust up to 99% over nonelectrostatic coating. Particle size and composition significantly affected the improvement produced by each charging method. As particle size increased, nonelectrostatic TE and adhesion increased, while dust decreased. Electrostatic TE increased and leveled off and adhesion and dust decreased with increasing particle size. Generally, corona TE, adhesion, and dust reduction was the highest, followed by teflon triboelectric, nylon triboelectric, and nonelectrostatic coating. For proteins, teflon produced higher charge to mass, TE, and adhesion than nylon. Although the corona system was most efficient, the teflon triboelectric system produced comparable results for some powders and may be necessary to produce a thick coating while minimizing back ionization and alleviating Faraday Cage effects.

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Characterization of tribocharging properties of powder paint

Cited by 20 publications

References 6 publications

Manipulating Nanoscale Contact Electrification by an Applied Electric Field

Manipulating Nanoscale Contact Electrification by an Applied Electric Field

Stress Induced Mechano-electrical Writing-Reading of Polymer Film Powered by Contact Electrification Mechanism

Corona Compared with Triboelectric Charging for Electrostatic Powder Coating

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