1. Methods presentation

The main conventional methods for producing anisotropic polymer microparticles can be either physical or chemical.

Physical methods

• One example is the elongation/compression method used in a multi-stage process. comprising: preparation of an oil-in-water emulsion containing droplets of a polymerizable solution; then, addition of a viscosifier (hydrophilic polymer, locust bean gum, etc.) to render the aqueous phase viscoelastic; finally, compression between two planes and heating of the resulting solution to trigger polymerization...