title: Encapsulation and Enhanced Retention of Fragrance in Polymer Microcapsules.
abstract: Fragrances are amphiphilic and highly volatile, all of which makes them a challenging cargo to efficiently encapsulate and retain in microcapsules using traditional approaches. We address these limitations by introducing a new strategy that combines bulk and microfluidic emulsification: a stable fragrance-in-water (F/W) emulsion that is primarily prepared from bulk emulsification is incorporated within a polymer microcapsule via microfluidic emulsification. On the basis of the in-depth study of physicochemical properties of the microcapsules on fragrance leakage, we demonstrate that enhanced retention of fragrance can be achieved by using a polar polymeric shell and forming a hydrogel network within the microcapsule. We further extend the utility of these microcapsules by demonstrating the enhanced retention of encapsulated fragrance in powder state.
authors.affiliation: School of Engineering and Applied Sciences and Department of Physics, Harvard University , Cambridge, Massachusetts 02138, United States.
authors.forename: Hyomin
authors.initials: H
authors.lastname: Lee
authors.affiliation: School of Engineering and Applied Sciences and Department of Physics, Harvard University , Cambridge, Massachusetts 02138, United States.
authors.forename: Chang-Hyung
authors.initials: CH
authors.lastname: Choi
authors.affiliation: Department of Food Science, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Alireza
authors.initials: A
authors.lastname: Abbaspourrad
authors.affiliation: Corporate Engineering, The Procter & Gamble Company , Cincinnati, Ohio 45069, United States.
authors.forename: Chris
authors.initials: C
authors.lastname: Wesner
authors.affiliation: Corporate Engineering, The Procter & Gamble Company , Cincinnati, Ohio 45069, United States.
authors.forename: Marco
authors.initials: M
authors.lastname: Caggioni
authors.affiliation: Corporate Engineering, The Procter & Gamble Company , Cincinnati, Ohio 45069, United States.
authors.forename: Taotao
authors.initials: T
authors.lastname: Zhu
authors.affiliation: School of Engineering and Applied Sciences and Department of Physics, Harvard University , Cambridge, Massachusetts 02138, United States.
authors.forename: David A
authors.initials: DA
authors.lastname: Weitz
keywords: emulsions; encapsulation; fragrance; microcapsules; microfluidics; retention