which one is better for self-cleaning glass technology hydrophilic or hydrophobic ?
note: I am thinking of using TiO2 (photocatalytic technology)
Good day, Reham Dabboura! Hope you are doing well.
TiO2 seems to be mainly used in hydrophilic and superhydrophilic SCG. Thus, if you are considering to prefer TiO2 in your research - dive into the field of superhydrophilic SCG. I recommend you that one principal review:
Article Titanium dioxide based self-cleaning smart surfaces: A short review
However, hydrophilic SCG still have their own challenges (adherence specificity, mechanical stability). The main point here is to specify, which kind of pollutants you will be "cleaning" - biocontaminants, microparticles, chemicals, diffractive phases (f.e. water droplets). Thus, neither hydrophilic, nor hydrophobic SCG are better or worth - it is only a matter of your aim of study.
Feel free to mention me in your response in case of any extra questions.
Best of luck in your research!
Yours sincerely,
M. Sc. Vadym Chibrikov
Department of Microstructure and Mechanics of Biomaterials
Institute of Agrophysics, Polish Academy of Sciences
dear Vadym Chibrikov thank you for answer
I want to doing this research for building materials (as a glass), the pollutants which I will be "cleaning" is the rain the dirt in the outside air
Independent of photocatalytic degradation, building protection generally uses hydrophobic moisture permeable silane coatings on a commercial scale. The attached gives a good introduction: Hydrophobicity-Hydrophilicity_and_Silane_Surface_Modification
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