title: Layer-by-layer assembled multilayer shells for encapsulation and release of fragrance.
abstract: Layer-by-layer assembled shells are prospective candidates for encapsulation, stabilization, storage, and release of fragrances. A shell comprising four alternative layers of a protein and a polyphenol is employed to encapsulate the dispersed phase of a fragrance-containing oil-in-water emulsion. The model fragrance used in this work consists of 10 ingredients, covering a range of typically employed aroma molecules, all premixed in equal mass and with sunflower oil acting as the base. The encapsulated emulsion is stable after 2 months of storage at 4 °C as revealed by static light scattering and confocal laser scanning microscopy. Gas chromatography/mass spectrometry data show that the encapsulation efficiency of 8 out of 10 fragrance ingredients depends on the water solubility: the less water-soluble an ingredient, the more of it is encapsulated. The amount of these fragrance ingredients remaining encapsulated decreases linearly upon emulsion incubation at 40 °C and the multilayer shell does not hinder their release. The other two fragrance ingredients having the lowest saturation vapor pressure demonstrate sustained release over 5 days of incubation at 40 °C. The composition of released fragrance remains almost constant over 3 days of incubation, upon further incubation it becomes enriched with these two ingredients when others start to be depleted.
authors.affiliation: Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR) , 3 Research Link, 117602, Singapore.
authors.forename: Anton V
authors.initials: AV
authors.lastname: Sadovoy
authors.forename: Maria V
authors.initials: MV
authors.lastname: Lomova
authors.forename: Maria N
authors.initials: MN
authors.lastname: Antipina
authors.forename: Norbert A
authors.initials: NA
authors.lastname: Braun
authors.forename: Gleb B
authors.initials: GB
authors.lastname: Sukhorukov
authors.forename: Maxim V
authors.initials: MV
authors.lastname: Kiryukhin