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Fabrication of Transparent, Superhydrophobic and Self-cleaning Coatings for Glass Substrate Using Nano-particles

Liravi, Mohammad | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52097 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): moosavi, Ali
  7. Abstract:
  8. Although using solar energies have some limitations, such as low efficiency, require a large space and high starting cost, they are one of the most attractive source of energies. The reasons that cause efficiency of the solar panels decrease are contamination of dust particles on them and formation of water droplet on solar panel surface due to humidity of the air. Also, a solar panel can absorb only 25% of incident light and the others are reflected by the cover glass. Therefore, fabrication of a self-cleaning surface that can inhibit the aggregation of dust particles and also transparent that doesn’t reflect the incident light is crucial.In this work, we aim to obtain a transparent, hydrophobic and self-cleaning surface using spray coating. TiO2 nanoparticles are modified by low surface free energy materials in order to enhance the hydrophobicity. The advantage of using low surface free energy materials for a solar panel is inhibition of aggregation of dust particles and by the time the surface is being washed by water, water droplets can wash dust particles and make the surface clean. Also, TiO2 nanoparticles possess anti-reflective property that result in increasing the transmittance of the solar panel cover glass.The results indicate that the four obtained surfaces display water contact angle of 103.7 degree to 142.2 degree, respectively, which indicate high self-cleaning property. Also, by applying these coatings on a solar cell we observed that the recovery for a solar cell with A1 coating is 92%, whereas the recovery for a solar cell with bare glass is 71%
  9. Keywords:
  10. Superhydrophobic Surfaces ; Self-Cleaning ; Transparency ; Contact Angle ; Solar Panel

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