1. Achieving a slippery, liquid-infused porous surface with anti-icing properties by direct deposition of flame synthesized aerosol nanoparticles on a thermally fragile substrate
- Author
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Jurkka Kuusipalo, Heli Koivuluoto, Petri Vuoristo, Mikko Tuominen, Hannu Teisala, Henna Niemelä-Anttonen, Johanna Lahti, Juha Harra, Janne Haapanen, Christian Stenroos, Paxton Juuti, Jyrki M. Mäkelä, Tampere University, Physics, Research area: Aerosol Physics, Doctoral Programme in Engineering and Natural Sciences, Research group: Aerosol Synthesis, Materials Science, Doctoral Programme in Engineering Sciences, Research group: Surface Engineering, and Research group: Paper Converting and Packaging
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,Nanoparticle ,02 engineering and technology ,Substrate (electronics) ,engineering.material ,Polyethylene ,010402 general chemistry ,021001 nanoscience & nanotechnology ,114 Physical sciences ,01 natural sciences ,Silicone oil ,0104 chemical sciences ,chemistry.chemical_compound ,Coating ,chemistry ,Chemical engineering ,216 Materials engineering ,engineering ,Deposition (phase transition) ,Nanometre ,0210 nano-technology ,Porosity - Abstract
Slippery, liquid-infused porous surfaces offer a promising route for producing omniphobic and anti-icing surfaces. Typically, these surfaces are made as a coating with expensive and time consuming assembly methods or with fluorinated films and oils. We report on a route for producing liquid-infused surfaces, which utilizes a liquid precursor fed oxygen-hydrogen flame to produce titania nanoparticles deposited directly on a low-density polyethylene film. This porous nanocoating, with thickness of several hundreds of nanometers, is then filled with silicone oil. The produced surfaces are shown to exhibit excellent anti-icing properties, with an ice adhesion strength of ∼12 kPa, which is an order of magnitude improvement when compared to the plain polyethylene film. The surface was also capable of maintaining this property even after cyclic icing testing. Slippery, liquid-infused porous surfaces (SLIPSs) are nature inspired surfaces that are designed to repel liquid and solid materials. These surfaces have been shown to pose anti-icing properties, which broadens the available end-uses from the chemical industry to arctic transportation and energy production. The method behind repellency of SLIPSs relies on preventing outside liquids from penetrating the surface structure to the Wenzel state. Instead, the slippery liquid within the porous solid supports the Cassie-Baxter state (instead of air, here the porous structure is filled with lubricant), where the reduced area of the porous solid surface is available to interact with the liquid or ice to be repelled. The difference between Wenzel and Cassie-Baxter states is illustrated in Figure 1. This phenomenon is exploited in many superhydrophobic surfaces where an air cushion is entrapped within the porous solid surface. As a result, spherical water drops easily roll off the surface (and have static contact angles larger than 150°). publishedVersion
- Published
- 2017