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A Model Analysis of the Triboelectric Charging of Fumed Silicas

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Nano-sized (e.g., 7nm primary particle size) fumed silica particles typically exhibit an ultra-high negative triboelectric charge-to-mass ratio (q/m) when agitated with micron-sized (e.g., 50 to 100μ diameter) carrier beads. Micron-sized toner particles (e.g. 5 to 9μ diameter) also exhibit an increasingly negative charge when fumed silica particles are applied as external additives to their surface.

In this present report, a quantitative analysis of triboelectric charging data from mixtures of fumed silica particles and carrier beads is presented, based on a mechanistic model for triboelectric charge generation. The model is also used to illustrate the connection between the triboelectric charging properties of fumed nano-sized silica particles and the charge level of external additive micron-sized toners
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Document Type: Research Article

Publication date: 2011-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

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