Durable Low Ice Adhesion Foams Modulated by SubmicrometerPores
2019
Ice
accretion is a severe challenge for both production and livelihood
in cold regions. Previously reported high-performance icephobic surfaces
by infusing lubricants are either temporarily icephobic, chemically
unstable, or mechanically weak. Herein, we report the design and fabrication
of submicrometer porous polydimethylsiloxane (PDMS; Sylgard 184 with
weight ratio 10:1) foam based chemically stable and mechanically robust
icephobic materials. The relationship between the ice adhesion strength
and porosity is revealed. Without any surface additives and lubricants
as well as sacrificing the cross-linking density of elastomeric foam,
the stable ice adhesion strength of the submicrometer porous foam
reaches 16.8 ± 5.8 kPa after 50 icing/deicing cycles. In addition,
the icephobic foams show excellent chemical stability and mechanical
robustness, and the ice adhesion strengths are all less than 30.0
kPa after acid/base/salt/organic solvent corrosion and 1000 abrasion
cycles. The submicrometer porous elastomeric strategy opens up a new
avenue for high-performance durable icephobic materials with excellent
stability and robustness.
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