Hi,
Does anyone have any experience / advice on stabilizing solutions with heavy fumed silica loading (~60%)?
I am seeing odd viscosity behavior in my system where stored solutions are showing a kind of viscosity gradient with the bottom being less viscous than the top. Are agglomerates of fumed silica forming and rising to the surface? The solution doesn't have a noticeable visual indication of any sort of separation.
Any advice you can give into this phenomenon and how to stabilize it would be greatly appreciated.
Thanks,
Mike