|Toos Nano Powder Study Production|
|No Title||0.01 MB|
Construction Masonry MaterialsIntelligent / Photocatalyst Coating
Due to the embeding of nanoparticles in the polymeric base, the proper hydrophobic property is created on the surface of brick. Micro and nano sized roughness due to the presence of nanoparticles, reduce the surface adhesion force between droplets of water and the surface of the brick. On the other hand, the results of measurements of water contact angle are given in the table below. Increasing the contact angle by applying coatings containing nanoparticles changes the water droplets to a sphere shape condition and prevent them from sticking to the brick surface.
The mechanical properties and the reasonable price of the bricks have made them widely used in structures, exterior and interior building facades. The low amount of water absorption in these materials results in less damage and build up dampness, and consequently their longer life. On the other hand, it is important to preserve monuments and even new ones made of bricks to counter environmental degradation factors such as dust and even acidic rain. Although this is partially provided by traditional coatings, it is not effective because the colors form a layer that is yellowish due to exposing to the sunlight and also destroys the drying capability of brick. As a good alternative to traditional paints, hydrophobic nanofibers contribute significantly to the longevity and beauty of the bricks. The nanoparticle-containing colloid creates hydrophobic coatings on the surface, preventing the damaging effects of factors such as weathering and discoloration and increase the lifetime. Applying these coatings causes water particles to not adhere to the surface and also to remove dirt particles from rainwater droplets on the brick surface.