Hi everyone - I'm utilising P25 TiO2 as a coating for fabrics. I'm trying to ensure I get the smallest particle size as possible to ensure maximum interaction between the particles and surface. Does anyone have any tips on preparing sub-100nm dispersions? Dispersing with a gemini surfactant in water gives me 167nm particles, so was wondering what else I could add to reduce the size futher!
Hope someone can help
Michael Pascoe P25 is a commonly used titania with dispersed particle size around 20 - 30 nm depending on the measurement technique. You'll find help on RG. For example:
https://www.researchgate.net/post/How-to-disperse-Titanium-dioxide-Ti02-nano-particles-in-water
Article Dispersion, fractionation and characterization of sub-100nm ...
The material is identical to NIST Standard Reference Material (SRM) 1898 and the attached publication may help.
In general terms the following webinar (registration required) should be of assistance describing the 3 stages of wetting, separation, and stabilization.
Dispersion and nanotechnology
https://www.malvernpanalytical.com/en/learn/events-and-training/webinars/W190528DispNanoMat
BTW, you can edit the typo in your question ('disersal' for dispersal) with the arrow at the right hand of your question. Unfortunately, RG doesn't allow you to to have upper or lower case in a question line so we have to tolerate the incorrect TiO2 for TiO2...
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