The Aromatic Properties of Polyurea-Encapsulated Lavender Oil Microcapsule and Their Application in Cotton Fabrics

Lavender fragrance loaded polyurea microparticles were successfully prepared via interfacial polymerization. The microcapsulated lavender essence was directly impregnated into the fabrics as an aromatic reagent. And the encapsulation efficiency measured was 75.68% when the core-wall ratio (Mlavender: MHDI) was 2:1. Laser light particle size analyzer showed that the size of spherical nanocapsule varied in the range 2–20 μm. The release process of microcapsules conformed to pseudo-first order kinetics. And the release contents of main lavender fragrance components involved D-limonene, cineole, linalool and propyl propionate from the cotton fabrics were accurately calculated. These aroma compounds of the cotton fabrics impregnated with microcapsulated lavender only lost less than 50% of their aroma after 12 weeks of deposition. Gas chromatography/hydrogen flame ionization detection (GC-FID) indicated that aromatic fabrics treated with microcapsulated lavender exhibited a better sustained-release properties than that of fragrance emulsion.