Functional electrospun polymeric nanofibers incorporating geraniol-cyclodextrin inclusion complexes: high thermal stability and enhanced durability of geraniol
Date
2014Source Title
Food Research International
Print ISSN
0963-9969
Publisher
Elsevier Ltd
Volume
62
Pages
424 - 431
Language
English
Type
ArticleItem Usage Stats
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Abstract
In this study, solid geraniol/cyclodextrin inclusion complexes (geraniol/CD-IC) were successfully prepared by using three types of native CD (α-CD, β-CD and γ-CD). The modeling studies for inclusion complexation between CD and geraniol were performed by using ab initio techniques. Both experimentally and theoretically, the complexation efficiency between geraniol and γ-CD was higher; therefore, geraniol/γ-CD-IC was chosen and then incorporated into polyvinyl alcohol (PVA) nanofibers (NF) via electrospinning. The scanning electron microscopy imaging elucidated that the aggregates of geraniol/γ-CD-IC crystals were distributed in the PVA NF, whereas bead-free and uniform PVA and PVA/geraniol NF without CD-IC were obtained. Higher thermal stability of geraniol was observed in the electrospun PVA/geraniol/γ-CD-IC NF. However, geraniol molecules having volatile nature could not be preserved without CD-IC during electrospinning or during storage; therefore, the complete evaporation of geraniol in PVA/geraniol NF was unavoidable even after one day of its production. On the contrary, the loss of geraniol was minimal (~. 10%) for PVA/geraniol/γ-CD-IC NF even after storage of these NF for two years owing to inclusion complexation. Our study demonstrated that electrospun NF incorporating CD-IC may be quite applicable in food industry, e.g.: active food packaging or functional foods, due to very high surface area and nanoporous structure of NF; high thermal stability and enhanced durability of active agents and functional food ingredients.
Keywords
CyclodextrinElectrospinning
Geraniol
Inclusion complex
Nanofiber
Polyvinyl alcohol (PVA)
Cyclodextrins
Durability
Electrospinning
Nanofibers
Polyvinyl alcohols
Scanning electron microscopy
Thermodynamic stability
Active food packaging
Geraniol
High thermal stability
Inclusion complex
Inclusion complexation
Nanoporous structures
Poly (vinyl alcohol) (PVA)
Polymeric nanofibers
Monoterpenes