About Sagan Coat
What then exactly is Sagan Coat? Simply put, Sagan Coat is a patented titanium dioxide nano-film produced exclusively in Japan. This titanium dioxide nano-film has strong photo-catalytic properties, which when activated, transforms the applied surface into a self-cleaning, anti-microbial (sterilizing) and deodorizing platform. A detailed explanation is written below.
Sagan Coat are independently self-cleaning due to the photo-catalytic properties of titanium dioxide. That is, in the presence of light (visible or sunlight) and water (rain), the applied surface does not require any further cleaning. Water marks or grime normally found on surfaces would not be a problem for a Sagan Coated surface. For examples of such applications, please visit our past projects section.
Sagan Coated surfaces are also exhibits anti-microbial – and thus sterilizing – effects. Sagan Coated surfaces actively breaks down whatever organic matter – bacteria, viruses or fungi – on coated surface. This active sterilizing effect is extended onto the air surrounding the surface, creating a strong sterilizing effect for applied areas.
Sagan Coated surfaces are also strong deodorizers and decomposers of volatile organic compounds (VOCs). Similar to its anti-microbial mechanism, coated surfaces break down organic matter responsible for odour – as well as VOCs – on the film surface. This effect extends too to the air around the film, turning the applied surface into an active solution for smell problems.
How does Sagan Coat Work?
How then does photo-catalytic titanium dioxide work? Firstly it is essential to understand what a photocatalyst is. Simply put, photocatalysts are substances that accelerate chemical reactions caused by light. Photocatalysts though, are never “used” in the reaction. Let us look at the basic mechanisms behind titanium dioxide’s photocatalytic properties.
Let us first refer to the diagram on the left. The diagram depicts the Conduction and Valence bands of titanium dioxide. Upon exposure to certain levels of light (at least 3.2 eV), electrons are excited to a higher energy state, leaving a positive charge or “hole” on the titanium atom. This “hole” has the capability to oxidize another molecule.
In the presence of air or water, oxygen reacts with the excited electrons and hydrogen reacts with the “holes”, forming hydroxyl radicals which oxidizes oxygen and organic molecules directly.
Hydroxyl ions formed in the process described above are responsible for breaking down organic water and oxygen on the surface of the film. This is a continual and active process. That is, the film of titanium dioxide would not stop breaking down any organic matter on the surface. Titanium dioxide is also not “used” in this process. Rather, it exists as a catalyst for the reaction.
The decomposing of organic matter is primarily responsible for the film’s self-cleaning, deodorizing and anti-microbial properties. By being able to break down any organic matter on the surface, the titanium dioxide film decomposes bacteria, fungi, viruses and oils responsible for dirt marks, stains and odour.
The titanium dioxide film too has hydrophilic qualities. As shown on the pictures on the left, coated surfaces form a “water curtain” instead of droplets when exposed to water. This helps to optimize cleaning of surface material by washing off whatever matter that is left behind after organic matter decomposition.