A process for producing biopolymer nanoparticles is described, in which the
biopolymer is plasticised using shear forces, a crosslinking agent being
added during the processing. After said processing. After said processing,
the biopolymer can be dissolved or dispersed in an aqueous medium to a
concentration between 4 and 40 wt. %. This results in starch nanoparticles
which are characterized by an average particle size of less than 400 nm.