Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Slow-releasing cyclodextrins with antimicrobials

Molecularly encapsulated preservatives were developed for further incorporation into PLA-films. The most promising antimicrobial, allyl isothiocyanate (AITC), was encapsulated into CDs.

Complexation technology was tailored for volatile and non-volatile preservatives and elaborated on the gram scale. The technology was successfully scaled-up to kg/batch size.

The CDs were thoroughly characterized. The complexation technology has been successfully modified for micronized complexes, and specifications for the components have been established.

Incorporation of approx. 10% AITC/alpha-CD was sufficient to prevent mould growth on cheese during prolonged storage.

The CD-assisted preserving PLA films can be regarded as water-activated, controlled-release biodegradable food packaging materials. The release of the molecularly encapsulated (CD-entrapped) AITC preservative into the vapour microenvironment is governed primarily by the actual humidity of the environment and temperature. This kind of "smart" packaging film for cheese products has not before been made or used.

The technology will cause an insignificant increase of the price of PLA films, as the applied cyclodextrin is not expensive. From an environmental standpoint it is a special advantage of the packaging material, that both the preservative (AITC) and the cyclodextrins are of plant origin - they both entirely decompose in nature.

The end users of such kind of controlled-release preserving packaging material will be food-packaging companies. The actual price availability and approval status of the selected preservative and cyclodextrin make this Biopack films a feasible, inexpensive environmentally safe, novel food packaging material, especially suitable for such products, that are to be transported long distances and under high humidity/high temperature conditions.

Informations connexes

Reported by

Cyclolab - Cyclodextrin Research and Development Laboratory Ltd
Dombóvári ùut 5-7, P.O. Box 435
1117 Budapest