期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 47, 页码 41521-41528出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b11356
关键词
inkjet printing; satellite droplets; superhydrophobic; Rayleigh instability; low adhesive; nozzle
资金
- National Nature Science Foundation NSFC [51473173, 21003132, 21073203, 21121001]
- 973 Program [2013CB933004]
- National Key Research and Development Program [2016YFC1100500]
- Chinese Academy of Sciences [XDA09020000]
Elimination of satellite droplets in inkjet printing has long been desired for high-resolution and precision printing of functional materials and tissues. Generally, the strategy to suppress satellite droplets is to control ink properties, such as viscosity or surface tension, to assist ink filaments in retracting into one drop. However, this strategy brings new restrictions to the ink, such as ink viscosity, surface tension, and concentration. Here, we report an alternative strategy that the satellite droplets are eliminated by enhancing Rayleigh instability of filament at the break point to accelerate pinch-off of the droplet from the nozzle. A super-hydrophobic and ultralow adhesive nozzle with cone morphology exhibits the capability to eliminate satellite droplets by cutting the ink filament at breakup point effectively. As a result, the nozzles with different sizes (10-80 mu m) are able to print more inks (1 < Z < 38), for which the nozzles are super-ink-phobic and ultralow adhesive, without satellite droplets. The finding presents a new way to remove satellite droplets via designing nozzles with super-ink-phobicity and ultralow adhesion rather than restricting the ink, which has promising applications in printing electronics and biotechnologies.
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