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High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
Published on: July 10, 2018
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Impulsively Induced Jets from Viscoelastic Films for High-Resolution Printing
Emre Turkoz1, Antonio Perazzo1, Hyoungsoo Kim1
1Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Physical Review Letters
|March 16, 2018
Summary
This study investigates non-Newtonian fluid jet formation using a laser nozzleless method. A new criterion using dimensionless parameters predicts single-drop breakup for optimized printing.
Area of Science:
- Fluid dynamics
- Materials science
- Printing technology
Background:
- Jet formation from non-Newtonian fluids is crucial for advanced printing and dispensing.
- Controlling drop formation is challenging due to complex fluid rheology.
Purpose of the Study:
- To investigate jet formation regimes in non-Newtonian fluids using a laser-based nozzleless method.
- To develop a predictive criterion for achieving single-drop breakup in printing applications.
Main Methods:
- Utilized a laser-based nozzleless printing technique.
- Employed time-resolved imaging to observe jet formation dynamics.
- Characterized fluid rheology and process parameters.
Main Results:
- Identified multiple jet formation regimes (zero, single, multiple drops per pulse).
- Regime transitions depend on ink thickness, rheology, and laser energy.
- Developed a methodology using dimensionless parameters to predict single-drop breakup.
Conclusions:
- A predictive criterion for single-drop breakup was established using dimensionless parameters.
- This methodology enables optimization of printing parameters for non-Newtonian inks.
- Offers a pathway to improve printing quality and precision.
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