Format

Send to

Choose Destination
ACS Appl Mater Interfaces. 2017 Nov 29;9(47):41521-41528. doi: 10.1021/acsami.7b11356. Epub 2017 Nov 14.

Rayleigh Instability-Assisted Satellite Droplets Elimination in Inkjet Printing.

Yang Q1, Li H1,2, Li M1, Li Y1,2, Chen S3, Bao B1, Song Y1.

Author information

1
Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences (BNLMS) , Beijing 100190, P. R. China.
2
University of Chinese Academy of Sciences , Beijing 100190, P. R. China.
3
Jiangsu Key Laboratory for Environmental Functional Materials, Research Center for Green Printing Nanophotonic Materials, Institute of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology , Suzhou 215009, P. R. China.

Abstract

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 superhydrophobic 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 μm) 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.

KEYWORDS:

Rayleigh instability; inkjet printing; low adhesive; nozzle; satellite droplets; superhydrophobic

PMID:
29110465
DOI:
10.1021/acsami.7b11356

Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center