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

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