Manipulating interactions between functional colloidal particles and polyethylene surfaces using interfacial engineering

► Interactions between lipid droplets and polymer surfaces are investigated, considering effects of surface electrical charges. ► Polymer surfaces subjected to UV-ozone treatment are anionic, as determined by electrostatic dye interactions. ► Cationic droplets adsorb most strongly to UV-ozone treated materials, which is attributed to electrostatic attraction. ► Non-ionic and anionic droplets have weak or minimal interaction with non-ionic and anionic polymer surfaces. ► Results of this work are important in understanding the behavior of encapsulated lipophilic components in packaged foods and consumer products.