A refillable fragrance carrier with a tuneable thermal switch
ABSTRACT Release of fragrant molecules from poly(ethylene oxide) (PEO) grafted chitosan particles could be controlled in a switchable manner through the thermo‐responsive hydration/dehydration of the PEO corona of the spheres that resulted in the de‐aggregation/aggregation among particles and corres...
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Published in | Flavour and fragrance journal Vol. 27; no. 5; pp. 386 - 392 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Chichester
Blackwell Publishing Ltd
01.09.2012
Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | ABSTRACT
Release of fragrant molecules from poly(ethylene oxide) (PEO) grafted chitosan particles could be controlled in a switchable manner through the thermo‐responsive hydration/dehydration of the PEO corona of the spheres that resulted in the de‐aggregation/aggregation among particles and corresponded to an on/off fragrant release switch. In water, mPEO–chitosan self‐assembled into spherical particles with the mPEO corona covering the surface and vanillin and citral could be loaded into the particles. The mPEO–water interaction took place at temperatures lower than the lower critical solution temperature (LCST) value and resulted in de‐aggregation among spheres which enabled release of the loaded fragrance molecules, whilst mPEO–mPEO interactions occurred at temperatures higher than the LCST value and resulted in aggregation among spheres which also halted the fragrance release. This thermal switch could be tuned to a desired temperature by adjusting the salt concentration. After the release of all fragrances, the thermo‐responsive carriers could be refilled again. Copyright © 2012 John Wiley & Sons, Ltd.
Release of fragrant molecules from poly(ethylene oxide) (PEO) grafted chitosan particles could be controlled in a switchable manner through the thermo‐responsive de‐aggregation/aggregation among particles and corresponded to an on/off fragrant release switch. This thermal switch could be tuned to a desired temperature by adjusting the salt concentration. After release of all fragrances, the thermo‐responsive carriers could be refilled again. |
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Bibliography: | ark:/67375/WNG-KSNTD5G9-9 istex:2A9E8CEDA7DFA8F1DD4BD53CB7BA6E9128B6FC56 ArticleID:FFJ3116 |
ISSN: | 0882-5734 1099-1026 |
DOI: | 10.1002/ffj.3116 |