All-Aqueous Direct Deposition of Fragrance-Loaded Nanoparticles onto Fabric Surfaces by Electrospraying

Encapsulation of bioactive aroma compounds into nanostructured matrixes has emerged as an attractive means to prolong the longevity of perfumery products. Existing technologies applied for fragrance micro/nano-encapsulation primarily rely on wet chemical processes, which suffer from some drawbacks such as the tedious preparation involving emulsion formulations and possible contamination of residual additives. Herein, we proposed an all-aqueous electrospraying method to prepare composite nanoparticles made up of fragrance/2-hydroxypropyl-beta-cyclodextrin complexes and regenerated silk fibroin with a greater than 90% aroma-encapsulation efficiency within the matrixes. Compared to fragrance/CD inclusion complexes, the asprepared silk nanocomposites are capable of more effectively preserving the volatile cargo and exhibited an ideal zero-order release kinetics with slow release rate upon the treatment of alcohol. Furthermore, a great benefit of this approach is that it allows the direct deposition of fragrance-carrying nanoparticles on the silk fabrics during the electrospraying fabrication.