I am working on non-newtonian fluid project. I have experimented with cornstarch and water and achieved the consistency desired with 55% cornstarch and 45% water.
Now I want to create similar outcome using silica nanoparticles and polyethylene glycol (PEG 400). However, I am not able to reach a proper result. I used the following ratio: 60:40 (polyethylene and silica), but I got a paste-like material instead of a shear thickening fluid.
And ideas on how to find an accurate ratio for desired result? Is the problem regarding the ratio or the mixing steps? Do I need specific equipment for the process?