Loading...

Synthesis and Properties of Functional Super Hydrophobic TiO2

Razavi, Atieh | 2019

495 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52952 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Dolati, Abolghasem
  7. Abstract:
  8. Titanium nano-oxide (TiO2) coatings have been used for self-cleaning, antimicrobial, and dust-proof designs. The degree of wetting of a solid surface with water in humid air depends on how the surface tension of the existing phases relates. The ratio between these tensions estimates the contact angle between a drop of water and the surface on which it is placed. A contact angle above 150 º is essential for surface overflow. In this study, 18 different combinations of titanium oxide and FAS, PDMS and PMS nanoparticles were obtained with a static contact angle of 165 to 150 º and a dynamic contact angle of 7 º.1 to 4.5 º. Following the measurement of water droplet slip speed on a sloping surface with an angle of 15º, as expected, the highest slip drop speed of belonging to the cover with more dynamic contact angle has been reported mm / s (32.4) and it can be concluded that the amount of surface runoff The larger the drop, the faster it will slip. By examining the amount of water penetration into the cover, it was observed that the uncoated sample absorbed 500 mg per cm2 for 24 hours. About 92% of this amount was absorbed in the first hour. The presence of the coating, as expected, had a significant effect on Resistant to water absorption. The combination with the most dynamic and static contact angles has the highest water penetration resistance .By setting the control pH, Ti-C-O and -CF bonds are formed, which indicates the complete connection of FAS to TiO2 nanoparticles. The presence of other new peaks in the fluorinated activated group indicates the activation of TiO2 nanoparticles with FAS molecules
  9. Keywords:
  10. Self-Cleaning ; Contact Angle ; Titanium Oxide ; Polydimethylsiloxane ; Superhydrophobic Surfaces ; Fluoroalkyl Silane ; Potassium Methyl Silane

 Digital Object List

 Bookmark

No TOC