Jet Break-Up in Nano-suspensions During Electrohydrodynamic Atomization in the Stable Cone-Jet Mode

This paper reports an investigation into electrospraying a nanosuspension containing nanoparticles sized at 5 nm and suspended in a polymer grade ethylene glycol. Hence, the processing of this nanosuspension in the stable cone-jet mode having an amorphous silica powder loading of 30 wt.% is elucidated. A comparison is made with established literature on jet break-up to identify the break-up mechanism in this investigation. The ensuing electrospray characteristics for both the polymer grade ethylene glycol and the nanosuspension are also presented. Using the data of collected droplet relics together with a volume equivalence method, the generated droplet sizes are estimated for both media and are compared with the well-known theoretical expression for calculating the droplet sizes generated for that respective jet break-up regime and medium. Finally, transmission electron microscopy of the collected deposits concludes the discussion presented in this investigation.

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Electrohydrodynamic atomization deposition and patterning of a carbon nano-suspension

Proceedings of the Institution of Mechanical Engineers Part N Journal of Nanoengineering and Nanosystems ◽

10.1177/1740349912439954 ◽

2011 ◽

Vol 225 (4) ◽

pp. 149-154 ◽

Cited By ~ 1

Author(s):

Dazhi Wang ◽

Hongbin Duan ◽

Jingliang Li ◽

Junsheng Liang ◽

Chong Liu

Keyword(s):

Flow Rate ◽

Applied Voltage ◽

Number Density ◽

Deposition Technique ◽

Electrohydrodynamic Atomization ◽

Stable Cone ◽

Working Parameters ◽

Working Distance

In this paper, a 6 wt% carbon nano-suspension was prepared and atomized using electrohydrodynamic atomization technique. The different atomization modes at certain regions of working parameters (applied voltage and flow rate) were studied. In the stable cone-jet mode, the effect of the working distance (distance between needle exit and substrate) on the size and distribution of the deposited relics was examined. It was observed that higher working distance resulted in larger size and higher number density of relics, mainly at the range of 0.2–0.4 µm. A continuous carbon line with the width of ~50 µm was also print-patterned using the electrohydrodynamic atomization deposition technique from the carbon nano-suspension.

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