The basic characteristics of self cleaning glass
The main component is titanium dioxide (TiO2). After plating / coating a layer of titanium dioxide on the glass, titanium dioxide has a super-hydrophilicity due to the ability to produce good photocatalytic properties under the influence of (ultraviolet) light energy. With this super-hydrophilic nature (as opposed to the hydrophobic nature of the gold seal coating), it allows small droplets to converge into large water droplets and fall off under the action of gravity, making stains stained on them easy Washed away by water, so that the glass has a clean and easy to use, so particularly suitable for outdoor architectural glass. The advantage is that the price is cheap, the disadvantage is that there must be ultraviolet radiation, and the same poor adhesion.
Hydrophile (Hydrophile): refers to the hydrophilic molecules can be through the hydrogen bonds and water molecules to form a short bond, making the water is particularly easy and hydrophilic surface combination. Our common capillary phenomenon is this principle.
On the market for glass and ceramic surface of the "easy to clean paint", or "self-cleaning paint can be divided into three categories:
The first category: the main component is silicone (or silicon organic resin) or other oily material composition, coated on the surface of the material gives a sense of slippery, but it does not and the material surface of the silica molecules to generate a solid Nano-film, but only to fill our naked eye can not see the uneven surface of the material, making the material surface smooth and uniform, the advantage of water (but not on the oil) also has a strong exclusion, the disadvantage is poor adhesion, in the Not long time (6-12 months), the characteristics of its rejection of water will be greatly reduced.
Hydrophobe: refers to a substance (a molecule) that has a strong repellent effect on water, and water forms a large contact angle on the surface of a hydrophobic object. We have the same effect.
The main component is inorganic nano-silicon material, on behalf of the product for the Japanese good Ruijia self-cleaning paint, which is characterized by super-hydrophilic coating surface and good dust, do not rely on sunlight, in the same no light environment, the role of titanium dioxide Type of product upgrade.
Japanese chemists invented a self-cleaning and non-foggy glass. The surface of this glass has a "double wet", can be stained with water and oil at the same time two kinds of liquid, so when the water vapor on the glass when it will spread on the entire glass surface, and will not condense water The In addition, the water in this mutual understanding can penetrate into the oily dirt, the oil washed away, which can have a strong self-purification capacity. Some people have done this experiment, in the water spray to the glass, the ordinary glass has been filled with fog beads and this glass is still through the text and pictures for people to read.
Ordinary glass surface easy to produce static electricity, will absorb the air in the dust, car exhaust, over time, very easy to dirty, in addition, when the rain, through the glass and water contact angle of 30-40 degrees, so the glass surface Easy to form water droplets, and water droplets are not easy to fall, in the water droplets drying process, and very easy to suck the dust in the air, dry water marks after the formation of long days, the formation of dirt.
Self-cleaning glass, also known as self-cleaning glass, is an eco-friendly "green glass", in the flat glass surface coated with a layer of transparent titanium dioxide, photocatalyst film, can be made of self-cleaning glass. When the titanium dioxide photocatalyst film called photocatalyst encounters sunlight or fluorescent light, when the ultraviolet light is irradiated, the organic matter adhering to the surface under the excitation of the external light causes the pollutant to become carbon dioxide and water and is automatically eliminated.
