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Monday, 16 December 2019
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Raw materials & technologies, Technologies

Self-cleaning abilities of superhydrophobic coatings using silica nanoparticles

Tuesday, 25 June 2019

For an actual study superhydrophobic coatings were prepared using hydrophobic silica nanoparticles. The coating on every substrate revealed self-cleaning ability.

The self-cleaning lotus effect has found huge attention in daily life. Image source: Avenfor7 / Pixabay.

The self-cleaning lotus effect has found huge attention in daily life. Image source: Avenfor7 / Pixabay.

Many technologies have surfaced through careful observation and investigation of unusual features of various species found in Nature. Among which, the remarkable non – wetting properties of lotus leaf has hugely occupied the minds of students, researchers and industrialists from last two decades. Due to high contact angle (>150°), water drops readily roll off the lotus leaf surface compiling dirt particles.

This self-cleaning lotus effect has found huge attention in daily life. Many surfaces in day-to-day life eventually get contaminated due to the accumulation of dust/dirt or through air pollution. A huge amount of money, labor and energy is wasted in their restoration. The self – cleaning superhydrophobic coating is one of the best options for this problem.

Every coated substrate exhibited superhydrophobicity

In a recent study, the suspension of hydrophobic silica nanoparticles was dip and/or spray coated on the body of motorcycle, building wall, mini boat, solar cell panel, window glass, cotton shirt, fabric shoes, paper (currency notes), metal, wood, sponges, plastic and marble. Every coated substrate exhibited superhydrophobicity with water contact angle nearly 160° and sliding angle less than 6°. The self-cleaning performance of the superhydrophobic coating applied on various substrates was thoroughly evaluated.

The study has been published in Progress in Organic Coatings, Volume 128.

Image source: Pixabay.

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