jp5b10079_si_008.mov (11.2 MB)
Rapid Fabrication of T‑Shaped Micropillars on Polypropylene Surfaces with Robust Cassie–Baxter State for Quantitative Droplet Collection
media
posted on 2016-01-28, 00:00 authored by An-Fu Chen, Han-Xiong HuangApplying microinjection compression
molding technology, a fast
and flexible method is first proposed for the successive and mass
replication of polypropylene surfaces with T-shaped micropillars in
the present work. The water droplet on the titled surfaces grows in
size to roll off due to gravitation effect. Interestingly, the roll-off
angles on such surfaces are as a quadratic function of specified water
droplet volume, meaning quantitative droplet collection and lossless
transfer can be performed on the replicated surfaces. Meanwhile, self-cleaning
behavior is preserved on the surfaces. Moreover, the robust Cassie–Baxter
state on the replicated surfaces against the external pressure is
demonstrated with droplet compression and immersion experiments. Specifically,
a droplet sitting on the replicated surface can recover its spherical
shape after squeezed to a water film as thin as 0.37 mm, and the replica
is remained fully spotless after it is submerged into dyed water.
The proposed method for fast replication of microstructured surfaces
can be an excellent candidate for the development of microfluidics
and droplet manipulation.
History
Usage metrics
Categories
Keywords
water droplet volumemass replicationmicrostructured surfacesimmersion experimentsdroplet manipulationdroplet collectionlossless transferwater filmpolypropylene surfacesQuantitative Droplet CollectionApplying microinjection compression molding technologywater dropletPolypropylene Surfacesgravitation effectdroplet compressionRapid Fabrication0.37 mm
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC