High speed imaging of micro-sized droplet jetted on surface with wettability pattern
Experimental results based on high speed imaging of micro-sized droplet jetted on a hydrophobic surface with hydrophilic lines are presented. The effects of the hydrophilic line and the initial impact offset distance from the line on the droplet spreading behaviour are studied. Two distinct proc...
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| Main Authors: | , |
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| 其他作者: | |
| 格式: | Conference or Workshop Item |
| 語言: | English |
| 出版: |
2014
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/102901 http://hdl.handle.net/10220/20337 http://icomm2014.northwestern.edu/wF-OJYAo87YrJoO7SpZX60/Program/Files/micro-scale-material-issues.htm |
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| 機構: | Nanyang Technological University |
| 語言: | English |
| 總結: | Experimental results based on high speed imaging of micro-sized droplet jetted on a hydrophobic surface with hydrophilic lines are
presented. The effects of the hydrophilic line and the initial impact offset distance from the line on the droplet spreading behaviour
are studied. Two distinct processes have been identified, namely the centering and conforming processes. During the centering
process, the droplets which impinge at a certain offset distance from the center of the hydrophilic lines migrate towards the center
of the line. A droplet with a larger offset distance experiences a slower centering process. This conforming process involves
droplets elongate along the hydrophilic line, causing the droplet to conform to the wettability pattern. The outcome of this study can
be applied to inkjet printing process for the enhancement of material deposition accuracy and tolerance of printed micro-sized
features. |
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