Lotus Leaf ©Sto CorpWhy does water roll off a duck's back? Or a butterfly's wings? What about the lotus leaf?
Because a duck, a butterfly and a lotus leaf have surface textures
that interact with water molecules differently than animals, insects and plants
that absorb water. Now, ducks,
butterflies, and lotus leaves do not have the same surfaces, but studying each
of them can help today's manufacturers mimic their molecular structures to
create materials that function similarly.
You know how some plant leaves seem to be dirtier after a
rain than before? Water seems to move
all the dirt in one or two directions which leaves a perceptible line or squiggle
of dirt. The lotus leaf, on the other
hand, gets clean when it rains. The
surface topography of the lotus leaf interacts with water molecules so that the
water rolls off the leaf and takes
the dirt with it.
That was exactly what Sto Corporation wanted for its Lotusan
sealer and paint. In the photo below,
you can see how close Lotusan comes to mimicking the molecular structure of the
lotus leaf. These cells are magnified 7,000 times!
Microstructure of Lotus Leaf (left) Microstructure Of Lotusan® (right) ©Sto Corp
Lotusan Paint ©Sto Corp The Lotus Effect® that
Lotusan developed resists the growth of mold, mildew, and algae because water
does not stay on its surface. Water runs
off a Lotusan-sealed building and it takes the dirt with it. Lotusan is self-cleaning just like the lotus
Biomimicry at work.
Ask Nature, Sto Corp