|
When the surface of
photocatalytic film is exposed to light, the contact
angle of the phtocatalyst surface with water is reduced
gradually. After enough exposure to light, the surface
reaches super-hydrophilicity. In other words, it does
not repel water at all, so water cannot exist in the
shape of a drop, but spreads flatly on the surface of
the substrate. And the water took the form of a highly
uniform thin film, which behaves optically like a clear
sheet of glass.
 
The hydrophilic nature
of titanium dioxide, coupled with the gravity, will
enable the dust particles to be swept away following the
water stream, thus making the product self-cleaning.
 
|
