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One-Step Fabrication of Bioinspired Lubricant-Regenerable Icephobic Slippery Liquid-Infused Porous Surfaces

Penelitian - Ice accretion on surfaces of infrastructures, transportation vehicles, and many others can result in severe damages; large-scale extreme examples of that are the 2008 Chinese winter storms and the Northeastern United States blizzard of 1978.

The traditional anti-icing methods, including active heating and usage of antifreeze liquid or salt, are either too costly or environmentally harmful. It is commonly conceived that the new generation of passive anti-icing surfaces and coatings holds a promise.

Penelitian One-Step Fabrication of Bioinspired Lubricant-Regenerable Icephobic Slippery Liquid-Infused Porous Surfaces

The superhydrophobic surfaces (SHS), surfaces with low surface energy, as well as micro and nanotopography, have been widely investigated because of their icephobic potential of repelling coming water droplets, delaying ice nucleation, and reducing ice adhesion strength.

However, this type of surfaces were proven to lose their icephobicity in high humidity atmosphere. The SHS cannot avoid moisture condensation in their surface micro- and/or nanotexture, which leads to the wetting transition from Cassie–Baxter state to Wenzel state and finally a catastrophic increase in ice adhesion strength.

The slippery liquid-infused porous surfaces (SLIPS) are attracting escalating attention because of their low-ice adhesion strength. Despite all of the encouraging laboratory scale results, the SLIPS are still far from being applicable in real environments owing to the key unsolved problem, namely anti-icing durability.

Inspired by the functionality of the amphibians’ skin, lubricant regenerability was introduced to conventional SLIPS and realized by a facile and scalable fabrication route. A series of polydimethylsiloxane (PDMS)-based skinlike SLIPS were designed and fabricated by using a one-step method, the solvent evaporation-induced phase separation technique.

The obtained skinlike SLIPS were able to regenerate surface lubricant constantly by internal residual stress because of phase separation and survive more than 15 cycles of wiping/regenerating tests. Yizhi Zhuo of Norwegian University of Science and Technology in Norway and colleagues have been work paves a new and facile way for achieving icephobic durability of SLIPS.



The new SLIPS demonstrated durable icephobicity, showing a long-term low-ice adhesion strength below 70 kPa, which was only 43% of 160 kPa that for the pristine PDMS (Sylgard 184), even after 15 icing/deicing cycles. This work paves a new and facile way for achieving icephobic durability of SLIPS.

Journal : Yizhi Zhuo et al. One-Step Fabrication of Bioinspired Lubricant-Regenerable Icephobic Slippery Liquid-Infused Porous Surfaces, ACS Omega, August 30, 2018, DOI:10.1021/acsomega.8b01148

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