Triboelectric Charge Characteristics and Donor-Acceptor, Acid-Base Properties of Minerals—are They Related?

Manouchehri, Hamid-Reza; Rao, K. Hanumantha; Forssberg, K.S.E.

doi:10.1080/02726350109709745

Cited by 4 publications

(7 citation statements)

References 18 publications

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“…Examples for the influence of some individual factors on the triboelectric charging of the particles can be found in [28,[47][48][49][50][51][52][57][58][59]. The impact of factors, such as contact Table 1 List of factors taking into account during the triboelectrostatic separation (partially after [62])…”

Section: Influencing Factorsmentioning

confidence: 99%

“…Bulk properties determine the electronic structure and charge exchange properties: Chemical composition [29,49,57] Crystallographic structure [21] Orientation of the terminal crystallographic planes [144,145] Impurities and dopants [144] Value of work function [21] Resistivity/conductivity [58] Difference in mechanical properties [146] Surface properties which influence the charge transport and type of contact: Electric properties (surface conductivity/resistivity, effective work function, surface states, electric permittivity) [29,57,58,72] Surface roughness [99] Orientation of the planes [144] Surface termination [21] Impurities and dopants [21,60] Surface functionalization and contamination (adsorbed ions and atoms, presence of water layer on the surface, chemical conditioning) [54,55,73] New cleavage charged surfaces [147] Differences in properties which influence the type of contact and contact stress: Composition of the powder (ratio between different minerals) [58] Average particle size and size distribution [58,59,72] Difference in shapes of particles [58] Polycrystallinity Multiple faceted materials…”

Section: Insulators Characteristics Powder Characteristics Equipment mentioning

confidence: 99%

“…The second technique used to characterize the tribocharging of particles is to measure the specific charge of powders of only one material with a Faraday cage. Charging is realized in different triboelectrostatic charging units, for instance by sliding particles on a plate [48], on a rotating drum [28,42,57], or a cyclone [59], etc. A prime disadvantage of the latter method lies in the weak predicting value of the behavior of powder mixtures.…”

Section: Triboelectrification At the Macroscalementioning

confidence: 99%

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Principal Factors of Contact Charging of Minerals for a Successful Triboelectrostatic Separation Process – a Review

Mirkowska

Kratzer

Teichert

et al. 2016

Berg Huettenmaenn Monatsh

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Triboelectrostatic separation is a promising method used to separate non-conductive minerals. However, the knowledge about the underlying triboelectrification mechanisms is still very limited. Thus, predicting the separation results and finding proper separation parameters are challenging tasks. This article presents a comprehensive summary of phenomena and factors which play a decisive role in the charging behavior of non-conductors and, by implication, the efficiency of the separation process, such as water and adsorbents layers on the surface, surface roughness, humidity, type of contact, etc. The authors hope that this article opens a way for a systematic approach through basic experiments dedicated to a better understanding of triboelectrification processes.

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Section: Influencing Factorsmentioning

confidence: 99%

Section: Insulators Characteristics Powder Characteristics Equipment mentioning

confidence: 99%

Section: Triboelectrification At the Macroscalementioning

confidence: 99%

See 1 more Smart Citation

Principal Factors of Contact Charging of Minerals for a Successful Triboelectrostatic Separation Process – a Review

Mirkowska

Kratzer

Teichert

et al. 2016

Berg Huettenmaenn Monatsh

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“…This is partly explained by the fact that the surface to volume ratio is increased when the particle diameter is decreased. Due to the measurement technique, the obtained q/m value specifies only a mean charge value for the particle sample under consideration, thus, single particle charges can differ widely due to different microscopic charging processes (Charlson et al 1992;Diaz 1997;Manouchehri et al 2001).…”

Section: Micro Particlesmentioning

confidence: 99%

High-Precision Combinatorial Deposition of Micro Particle Patterns on a Microelectronic Chip

Löffler¹,

Wagner²,

König³

et al. 2011

Aerosol Science and Technology

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The behavior of charged bio polymer micro particles when deposited onto a CMOS chip can be analytically modeled in form of the incompressible Navier-Stokes equation and the electrostatic Poisson equation, as we describe in this article. Based on these models, numerical simulations of depositions can be implemented in COMSOL that lead to improvements in the experimental setup, optimizing the size and charge distribution of the micro particles.Adapting the experiments according to the simulation results, we will show the powerful gain in deposition precision, which is essential for a contamination-free deposition and hence high quality combinatorial deposition.

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“…Properties of MCC, relative to various pharmaceutical applications, are known to depend on charge characteristics of the dry powders (Ramirez-Dorronsoro et al 2006). Because triboelectric charge bears a complicated relationship to the colloidal charge of particles in aqueous suspension (Baur et al 1999;Manouchehri et al 2001), it would make sense for future research to focus more attention on the electrokinetic properties of pharmaceutical-grade MCC.…”

Section: Microcrystalline Cellulose and Pharmaceutical Applicationsmentioning

confidence: 99%

Colloidal stability and aggregation of lignocellulosic materials in aqueous suspension: A review

Hubbe

Rojas

2008

BioRes

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Aqueous dispersions of lignocellulosic materials are used in such fields as papermaking, pharmaceuticals, and preparation of cellulose-based composites. The present review article considers published literature dealing with the ability of cellulosic particle dispersions (fiber, fines, nanorods, etc.) to either remain well dispersed or to agglomerate in response to changes in the composition of the supporting electrolyte solution. In many respects, the colloidal stability and coagulation of lignocellulosics can be understood in terms of well-known concepts, including effects due to osmotic pressure arising from overlapping electrostatic double layers at the charged surfaces. Details of the morphology and surface properties of lignocellulosic materials give rise to a variety of colloidal behaviors that make them unique. Adjustments in aqueous conditions, including the pH, salt ions (type and valence), polymers (charged or uncharged), and surfactants can be used to control the dispersion stability of cellulose, lignin, or wood-extractive materials to serve a variety of applications.

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Triboelectric Charge Characteristics and Donor-Acceptor, Acid-Base Properties of Minerals—are They Related?

Cited by 4 publications

References 18 publications

Principal Factors of Contact Charging of Minerals for a Successful Triboelectrostatic Separation Process – a Review

Principal Factors of Contact Charging of Minerals for a Successful Triboelectrostatic Separation Process – a Review

High-Precision Combinatorial Deposition of Micro Particle Patterns on a Microelectronic Chip

Colloidal stability and aggregation of lignocellulosic materials in aqueous suspension: A review

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