Solvent-free formation of hydroxyapatite coated biodegradable particles via nanoparticle-stabilized emulsion route

► Hydroxyapatite (HAp) nanoparticles stabilized polymer melt-in-water emulsions without any molecular surfactants. ► Interaction between polymer and HAp played a crucial role. ► HAp-coated polymer particles were obtained from the emulsions without any organic solvents.