Pigments like Titanium Dioxide are used in wall paints, sunscreens and similar.
I found some sources where these pigments are used in suspensions of up to 60% (for expample - 60% Titanium Dioxide 40% Medium).
Does anyone know a protocol how Pigment Rich suspensions (or sol - depending on the pigment form) can be created in lab-scale (few ml)
What is the best way to create mixtures like that with an even distribution of the pigment?
I am having trouble with much lower concentrations already - so my question is, how it can be done best.
Daryl, I can tell you a few things what I have gained from my experience.
If you want to have a suspension of particles dispersion in a solution (medium) then you should consider a few practical/logical things:
particle size/size distribution :
the finer the less sedimentation dirving force it will have. If it is not stirred properly it will ALWAYS tend to demix.
medium/pH value:
such suspension strongly depend on the pH value. And here of course we are talking about of Water-based suspensions. The properties of Titania (TiO2) strongly depend on the pH value, such as charging, tendency to form big agglomerates, as well as solubility.
with that in mind you should improve your overall Lab trials
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