Category — Hydrophobic Knowledge

Peter Liu just pointed us to a really interesting video on superhydrophobic surfaces. We hope you will enjoy as much as we did:
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What is special on a superhydrophobic surface is that the water droplets bounce and roll-off. This property makes the superhydrophobic surface very attractive for a great number of potential applications. It is actually very interesting to watch how the droplets are bouncing on superhydrophobic surfaces. GE scientists recorded with a high-speed camera a bouncing droplet on a superhydrophobic surface. [Read more →]

Hydrophilicity, comes from the Greek ύδωρ, (water) and φιλία (friendship). It refers to a physical property of a material that can transiently bond with water (H₂O) through hydrogen bonding.

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.

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