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Beta-Cyclodextrin Inclusion Complexes of Rose Oil and Rose Extract: Preparation and Physical Properties

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Abstract:

This study aimed to develop microcapsules of rose oil (RO)-β-cyclodextrin and rose extract (RE)-β-cyclodextrin using an optimized co-precipitation method. RO and RE were obtained via solvent-free microwave extraction (SFME), yielding 0.25% and 6.36%, respectively. The antioxidant activities and total phenolic contents of RO and RE were analyzed before microencapsulation. Results showed that RO and RE had IC50 antioxidant values of 6.22 µg/mL and 5.13 µg/mL, compared to Trolox at 4.67 µg/mL. Additionally, the total phenolic contents of RO and RE were found to be 215.46 ± 0.4 and 441.23 ± 1.2 mg GAE/g extract, respectively. The influence of varying ethanol concentrations (20%, 30%, 40%, and 50% v/v) on encapsulation efficiency was thoroughly investigated. Using β-cyclodextrin as the encapsulating agent, a 40% ethanol concentration provided high encapsulation efficiencies, with microcapsule recovery rates of 84.23% and 81.55%, and encapsulation efficiencies of 72.36% and 71.26% for RO and RE, respectively. Characterization of β-cyclodextrin inclusion complexes of RO and RE through scanning electron microscopy (SEM), fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermal analysis (DSC, TGA) revealed significant changes in FTIR spectra, XRD, SEM and thermal analysis, indicating complexations of β-cyclodextrin with RO and RE. Antioxidant activities and total phenolic contents of the optimized microcapsules, prepared using 40% ethanol concentration, were assessed after storage of microcapsules for 1 month, showing that the microcapsules effectively stabilized RO and RE over time. These findings suggest that RO and RE inclusion complexes with β-cyclodextrin could be promising bioactive materials for developing functional foods, beverages, and cosmetics.

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Periodical:

Materials Science Forum (Volume 1161)

Pages:

87-95

DOI:

https://doi.org/10.4028/p-Qo61ds

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Online since:

October 2025

Authors:

Thitiphan Chimsook*

Keywords:

Inclusion Complexes, Rose Extract, Rose Oil, β-Cyclodextrin

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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