I am currently trying to produce a dispersion of a biopolymer in water. For this, I first dissolve the polymer in an organic solvent that I then add to an aqueous phase with surfactants (up to 2%). During the homogenization, the solution seems homogeneous but upon evaporation under magnetic agitation, clumps tend to form. I have tried PVA, and Tween 80 at different concentration but similar results tend to happen.
Any suggestions on how to prevent this?