superhydrophobicity – TechConnect Briefs

Wettable Slippery Surfaces. Self-cleaning Effect and Mechanism

Law K-Y, Research and Innovative Solutions, US

The phenomenon of self-cleaning displayed by the Lotus leaf and many other plant and insect surfaces has attracted tremendous attention recently. Self-cleaning surface is usually superhydrophobic and non-wettable, and is characterized by a very large [...]

Superhydrophobic Thermoset Elastomers with Excellent Stability to Rain Erosion and Water Immersion

Kujan E., Farshchian B., Xu Q., Feldman M., Lyons A., ARL Designs LLC, US

Polymeric materials with superhydrophobic surfaces are advantageous for industrial applications such as electrical insulators, roof membranes and seals because their surfaces are self-cleaning and remain dry when exposed to rain. However most superhydrophobic surfaces are [...]

3D Printered and Plasma Treated Superhydrophobic Mesh Filters for Oil-water Separation

Lee H.J., Lee S., Jo W., Lee H.J., Lee S., Moon M.-W., Korea Institute of Science and Technology, KR

We develop the 3D printed mesh filters with plasma treatment using a radio-frequency plasma-enhanced chemical vapor deposition (rf-PECVD) to control their surface wettability. The nano-sclae hairy structures on the meshes are created by plasma etching [...]

Merino Wool Surfaces Made Superhydrophobic

Herzog M.B., Johnston J.H., Victoria University of Wellington, New Zealand, NZ

Natural merino wool fibres have been used to fabricate wash-fast nonwoven textile surfaces with superhydrophobic and oleophobic properties. Wet felted samples were used to study the effect of the fibre diameter and the degree of [...]

3D Printered and Plasma Treated Superhydrophobic Mesh Filters for Oil-water Separation

Lee H.J., Lee S., Jo W., Lee H.J., Lee S., Moon M.-W., Korea Institute of Science and Technology, KR

We develop the 3D printed mesh filters with plasma treatment using a radio-frequency plasma-enhanced chemical vapor deposition (rf-PECVD) to control their surface wettability. The nano-sclae hairy structures on the meshes are created by plasma etching [...]

Super-hydrophobic paper influence on bacterial attachment suggests potential application as packaging material

Jain S., Li L., Breedveld V., Hess D.W., Barnett C., Davis M., Singh S., Pillai S., Alabama State University, US

The surface topography and chemistry of cellulose-based paper, was controlled by a two-step plasma (glow discharge) treatment. Selective plasma etching of the amorphous regions of cellulose followed by plasma deposition of a thin (100 nm) [...]

Magnetically Induced Drop Movement on Nanorough Micropatterned Nanocomposites

Milionis A., Fragouli D., Anyfantis G.C., Bayer I., Cingolani R., Athanassiou A., Italian Institute of Technology, IT

Hybrid organic/inorganic surfaces are engineered by exploiting photo-lithographically tailored patterns of SU-8 polymer nanocomposites containing 2% wt colloidal nanoparticles of iron oxide. The role of the magnetic nanoparticles has two aspects. The first one is [...]

Adhesion strength and superhydrophobicity in polyurethane/organoclay nanocomposites

Steele A., Bayer I., Yeong Y.H., Loth E., University of Virginia, US

Polyurethane coatings are used on many different materials and in a wide variety of applications due to its high durability and adaptable chemical composition. Although there are a number of reports on the fabrication of [...]

Rendering superhydrophobic laser-induced rough surfaces by transfering on them Teflon nanoparticles

Athanassioua A., Bayer I., Brandi F., Cingolani R., Istituto Italiano di Tecnologia, IT

In this work we demonstrate the possibility to alter the wettability properties of silicon/SiO2 surfaces, by UV nanosecond pulsed laser irradiation, to render them initially superhydrophilic. By varying the laser fluence, it is possible to [...]

Selective Separation of Oil from Water via Superhydrophobic Magnetic Foams

Fragouli D., Bayer I., Bertoni G., Calcagnile P., Anyfantis G.C., Cingolani R., Athanassiou A., Italian Institute of Technology, IT

We demonstrate an inexpensive and very facile technique, of forming magneticaly actuated superhydrophobic/superoleophilic foams. Specifically, a simple commercial polyurethane foam is used as a substrate on which a small amount of toluene solution containing colloidal [...]