Click here to view the embedded video.

(Watch the video directly on youtube to turn up the resolution to Full HD: Link)

The procedure followed is fast and does not demand any special equipment.

The superhydrophobiccoating.com team continues the development of the coating and is looking for potential partners to support the further research and improvment of the coating.

Please do not hesitate to contact Panagiotis Manoudis for more information: contact information.

Transparent Superhydrophobic Coating is a post from: SuperHydroPhobic Coating

Consequently we can work together to develop your own specialized superhydrophobic products.

The first video shows water droplets rolling off a tilted metal sheet. As you can clearly observe no trace of water is observed on the treated surface. The treated Zn sheet has become superhydrophobic and so it is fully protected against the corrosion caused by water.The Zn sheet is placed outside. The treated surface is left outside to test whether the coating will remain superhydrophobic after being exposed to sun, wind, rain, snow and atmospheric pollutants.

The second video shows the same coating applied this time on a wall. The coating was applied on the wall again by brush, about a year before the video was captured.

The upper part of the picture shows the untreated wall. The untreated wall is fully wetted. The rest of the wall which was protected with the coating is superhydrophobic. As a result the wall is effectivelly protected against water.

The same coating has been applied on various substrates like stones, concrete, glass, wood, fabric and the results were excellent. Each one substrate  was turned to  superhydrophobic!

Contact information here: http://superhydrophobiccoating.com/aboutus/

The superhydrophobic coating of superhydrophobiccoating.com (videos)! is a post from: SuperHydroPhobic Coating

Education:Chemical Engineer, Ph.D,
Aristotle University of Thessaloniki, Greece
Fields of experience:Water repellant surfaces, coatings, surface protection

How we might work together:

Research on the development of specialized superhydrophobic products
Consulting and advisory
On site interim researcher
Guest lectures etc.

Latest research works on superhydrophobic coatings with:
ISOMAT, S.A., Greece
Kudos Blends Limited, U.K.

Feel free to contact me with any ideas and proposals!

Panagiotis Manoudis,Chemical Engineer, Ph.D is a post from: SuperHydroPhobic Coating

Click here to view the embedded video.

The video features Neil Shirtcliffe of test-tube.org.uk

Please feel free to comment and discuss the video below!

Wonderful experiments with superhydrophobic surfaces (video) is a post from: SuperHydroPhobic Coating

Watch it at: http://www.grcblog.com/?p=364

Of course the bouncing of a droplet on a surface is not as simple as it looks. There is a great number of parameters that determines how a droplet can impact on a superhydrophobic surface; drop size and impact velocity are examined in a new published study. The theoretical study of the impact of a water droplet on superhydrophobic surface is presented at: http://pubs.acs.org/doi/full/10.1021/la802897g

Water droplets bouncing on superhydrophobic surfaces is a post from: SuperHydroPhobic Coating

For further information: newscientist.com

Straight to the Journal :http://www3.interscience.wiley.com/journal/121497094/abstract

Superhydrophobic clothing is a post from: SuperHydroPhobic Coating

Super-hydrophobicity has also been observed on insects.

The super-hydrophobic biological surfaces have been under thorough study. On such surfaces there is a special morphology. There are surface structures in the micron-scale and also in the nano-scale. The surface structure prevents the water form touching the whole surface. So a water droplet would sit on mostly on the air like the fakir state. In some plants (e.g. Indian Cress) there is a fur on the surface. In particular there are elastic hairs on which the water is resting and so easily removing.

SEM images of the micro- and nano- structure on the surface of the Lotus leaf.

Water droplet on Lotus leaf

Lotus principle and other examples of Superhydrophobic surfaces in nature is a post from: SuperHydroPhobic Coating

Most of the real surfaces are rough. There two options for the water droplet.

i) To follow the roughness of the underlying substrate. When the substrate is hydrophilic the surface roughness reduces the water contact angle and when it is hydrophobic it enhances it.

So the parameter r (the ratio between the true surface area over the apparent one) controls θ* contact angle (Wenzel equation):

cosθ*= rcosθ

θ: Young’s contact angle

ii) The droplet does not follow the roughness of the surface

In this case the droplet is like a fakir. It is sitting upon a patchwork of solid and air. The more it is sitting on air, the higher the measured water contact angle.

The contact angle θ* is an average between the angle on the solid (cos θ) and the one on the air (cos180^o = -1):

cosθ^*= -1+f_s(cosθ+1)

f_s: fraction of the liquid that contacts the solid

The fakir state is also called Cassie – Baxter state.

A surface is called super-hydrophobic when water contact angle exceeds 150⁰. In this case usually a water droplet can bounce on the surface and also can roll-off on it with a tilt of less than 5⁰. In other words the surface is water-repellant. This kind of surfaces is also called self-cleaning. On a hydrophilic or on a hydrophobic surface the pollutants adhered to the water droplet, but the water droplet sticks on the substrate. So the water remains and evaporates on the surface and so the pollutants remain on it. Consequently the pollutants do not remove from the substrate. On a super-hydrophobic substrate the water rolls-off and leaves the surface taking the dirt with it. So the water cleans the surface. This is a very useful application especially for glasses of buildings. The self-cleaning mechanism is presented in the next figure:

Click for larger image

SuperHydroPhobic: How can a droplet sit on a surface is a post from: SuperHydroPhobic Coating

A hydrophilic material is a friend of water. Friends like to come closer, so a water droplet would spread on a hydrophilic surface. Furthermore water can enter the pores of a hydrophilic material and totally wet it. Most natural materials are hydrophilic.

The evaluation of hydrophilicity is made through water contact angle measurements. A water droplet would occupy as long surface of the hydrophilic material as possible. So the water contact angle will be significantly low.

Hydrophobicity comes also from the Greek ύδωρ, (water) and φόβος (fear). It refers to the physical property of a material (known as a hydrophobic) that repels a mass of water.

Water would be afraid of a hydrophobic material. So a water droplet would try not to touch large area of the surface and the shape of the droplet would be spherical. Hydrophobic natural materials are waxes, oils and fats.

The evaluation of hydrophobicity is made through water contact angle measurements. A water droplet would be spherical so the water contact angle will be significantly high.

Hydrophilic vs. hydrophobic. The meaning of contact angle is a post from: SuperHydroPhobic Coating

Feel free to contact us with comments, questions, suggestions, offers etc: info@superhydrophobiccoating.com – yes, we do actually read and answer! :-)

We are pointing the following additional domains to this website: hydrophobiccoating.com, hydrophobicpaint.com, superhydrophobiccoating.com, superhydrophobicpaint.com, superwaterrepellent.com, waterrepellentcoating.com, waterrepellentpaint.com

About us / Contact us is a post from: SuperHydroPhobic Coating