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Investigation And Fabrication Super Hydrophobic Coating On Building Facades

Bayat Mazlaghani, Mohammad | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55796 (07)
  4. University: Sharif University of Technology
  5. Department: Materials science and Engineering
  6. Advisor(s): Afshar, Abdullah
  7. Abstract:
  8. According to the creation of high-rise buildings and structures due to the increase in urbanization and population concentration in cities and attention to the beauty of these structures and the impact of this beauty on the morale of urban people, owners or municipalities costs a lot of money for cleaning the building facade every year. On the other hand, removing contaminants from high-rise buildings facades is difficult and lifethreatening. Today, with the advancement of science and the use of self-cleaning super hydrophobic coatings, many of these costs, as well as threats to life, can be prevented. On the other hand, protection of ancient structures as a cultural capital of a country, prevention of water accumulation and bacterial contamination in swimming pools and food industry, etc are other applications of super- hydrophobic coating. In this project, by making super hydrophobic coating and spraying it on concrete samples using spray process, concrete samples with super hydrophobicity and self-cleaning properties were produced so that the contact angle of concrete samples from 10 degrees and super hydrophilic state to 153.7 degrees and the super hydrophobic state changed, which indicates the creation of super hydrophobic concrete and the creation of the said properties, including self-cleaning to concrete.The coating used in this project is tested for the first time and is not similar to the previous studies. Therefore, the parameters affecting the properties of this coating, namely the concentration of the modifier and the number of sprays were investigated, the best result occurred at a cost-effective concentration of 5.3% volume fraction of the improver and 5 times sprays. As a sub-aspect and creating extent in the project, wooden samples were also tested, which according to the results, the existence of self-cleaning properties of these samples has also been proven
  9. Keywords:
  10. Superhydrophobic Coating ; Self-Cleaning ; Concrete ; Concrete Tall Buildings ; Silicon Oxide Nanoparticles

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