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Controlled release of perfumes from polymers. II. Incorporation and release of essential oils from glassy polymers

✍ Scribed by Nikolaos A. Peppas; David J. Am Ende

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 140 KB
Volume: 66
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19971017)66:3<509::aid-app11>3.0.co;2-q

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✦ Synopsis

Release of essential oils from glassy hydrophilic copolymers of 2-hydroxyethyl methacrylate (HEMA) and ethylene glycol dimethacrylate (EGDMA) was studied in a range of releasing media at 30ЊC. The release of carvone, limonene, and eugenol was investigated using swelling-controlled release systems based on these copolymers. By changing the crosslinking ratio of the copolymers it was possible to achieve zeroorder release. The amount of essential oil release was correlated to the thermodynamic compatibility of the oil-polymer pair, as judged by the solubility parameter difference.

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