At my job, I'm supposed to make some filament with highly loaded titanium oxide powder for research purposes. We're trying to get as much of this stuff into filament as possible. We've tried ABS, which works, but not very well. PLA is next candidate, possibly nylon. But I'm more concerned with the methodology we're using to get this done. We've tried to dissolve the polymer/powder and precipitate them. Also tried to dry mix the powder with the pellets into the extruder directly, which didn't work very well. The former is too costly, the latter we don't really have the equipment. So I'm just trying to get ideas on ways that this can be executed economically and effectively. Also, trying to figure out what additives (eg. plasticizers) would be good ones to try.

any suggestions that might point in the right direction would be appreciated. Thanks