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

• Published in: Journal of colloid and interface science 2011-08, Vol.360 (1), p.31-38
• Main Authors: Ziani, Khalid, Barish, Jeffrey A., McClements, David Julian, Goddard, Julie M.
• Format: Article
• Language: English
• Subjects: Adsorption; Cationic; Chemistry; Colloidal state and disperse state; colloids; Colloids - chemistry; containers; corn oil; Droplets; electrostatic interactions; Electrostatics; Emulsion; emulsions; Emulsions - chemistry; Emulsions. Microemulsions. Foams; encapsulation; engineering; Exact sciences and technology; fluorescence microscopy; food packaging; Fourier transform infrared spectroscopy; General and physical chemistry; Image contrast; Interactions; Lipids; Lipids - chemistry; Microscopy; Packaging; Particle Size; Physical and chemical studies. Granulometry. Electrokinetic phenomena; polyethylene; Polyethylene - chemistry; Polyethylenes; Polymer surface modification; polysorbates; scanning electron microscopy; sodium dodecyl sulfate; Stability; Surface chemistry; Surface physical chemistry; Surface Properties; Surface-Active Agents - chemistry; Surfactant; surfactants
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2011.04.057

Interfacial interactions between droplets and modified polyethylene. In contrast to negatively charged droplets (A and C), positively charged droplets (B) absorb strongly to the anionic UV–ozone treated PE, which is attributed to electrostatic attraction. [Display omitted] ► 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. The purpose of this study was to examine the interaction between lipid droplets and polyethylene surfaces, representative of those commonly used in food packaging. Lipid droplets with various surface charges were prepared by homogenizing corn oil and water in the presence of surfactants with different electrical characteristics: non-ionic (Tween 80, T80), cationic (lauric arginate, LAE), and/or anionic (sodium dodecyl sulfate, SDS). The ionic properties of polyethylene surfaces were modified by UV-treatment. Stable emulsions containing small droplets (d