title: Encapsulation of volatiles in nanofibrous polysaccharide membranes for humidity-triggered release.
abstract: A single-step electrospinning process will be applied to a blend of edible carbohydrate polymers (pullulan and β-cyclodextrin) to encapsulate bioactive aroma compounds and allow a humidity-triggered release. The encapsulation is rapid and efficient and the final product is an active nanofibrous membrane that can be directly used for food or active packaging applications. The membrane hosts small and homogeneously dispersed crystals of cyclodextrin-aroma complexes which are formed during the electrospinning. With this type of structure, the release of aroma compound is negligible at ambient conditions (23 °C and 55% UR) even at high temperature (up to 230 °C), and it occurs beyond a given relative humidity threshold (90%), useful for food packaging applications. The mass fraction of free aroma released is directly related to the water activity of the system, namely, φ=aW(n)/(aW(n)+Kapp) explaining the observed key role played by the relative humidity on the release of the aroma compounds.
authors.affiliation: Department of Food, Environmental and Nutritional Sciences (DEFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy. erika.mascheroni@unimi.it
authors.forename: Erika
authors.initials: E
authors.lastname: Mascheroni
authors.forename: Carlos Alberto
authors.initials: CA
authors.lastname: Fuenmayor
authors.forename: Maria Stella
authors.initials: MS
authors.lastname: Cosio
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Di Silvestro
authors.forename: Luciano
authors.initials: L
authors.lastname: Piergiovanni
authors.forename: Saverio
authors.initials: S
authors.lastname: Mannino
authors.forename: Alberto
authors.initials: A
authors.lastname: Schiraldi
mesh_terms: D002214:Capsules; D004337:Drug Carriers / Q000737:chemistry*; D005936:Glucans / Q000737:chemistry*; D006813:Humidity; D007700:Kinetics; D008567:Membranes, Artificial; D057139:Nanofibers / Q000737:chemistry*; D036103:Nanotechnology; D013696:Temperature; D014835:Volatilization; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D002214:Capsules; D004337:Drug Carriers; D005936:Glucans; D008567:Membranes, Artificial; D047392:beta-Cyclodextrins; C009109:pullulan
keywords: Aroma compounds; Controlled release; Cyclodextrins; Encapsulation; Nanofibers; Pullulan