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A refillable fragrance carrier with a tuneable thermal switch
Author(s) -
Seemork Jiraporn,
TreeUdom Thapakorn,
Wanichwecharungruang Supason
Publication year - 2012
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/ffj.3116
Subject(s) - lower critical solution temperature , chemistry , citral , chitosan , chemical engineering , molecule , spheres , thermal , sodium alginate , polymer chemistry , nanotechnology , organic chemistry , sodium , chromatography , polymer , copolymer , materials science , essential oil , thermodynamics , physics , astronomy , engineering
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.