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Encapsulation of food grade antioxidant in natural biopolymer by electrospinning technique: A physicochemical study based on zein–gallic acid system
Ist Teil von
Food chemistry, 2013-01, Vol.136 (2), p.1013-1021
Ort / Verlag
Kidlington: Elsevier Ltd
Erscheinungsjahr
2013
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
► Gallic acid was successfully incorporated into zein ultra-fine fibres at different loading amount using electrospinning. ► Changes on the physical and thermal properties of gallic acid were observed in gallic acid loaded zein electrospun fibres. ► ATR-FTIR results indicated that interactions occurred between gallic acid and zein at the molecular level. ► Gallic acid loaded zein electrospun fibres had exhibited potent antioxidant activities.
Gallic acid was successfully incorporated into zein ultra-fine fibres at different loading amount (5%, 10% and 20%) in order to develop an encapsulating technology for functional ingredient delivery using electrospinning. The produced fibres exhibit diameters ranging from 327 to 387nm. The physical and thermal properties of encapsulated gallic acid were determined by X-ray diffraction (XRD) and differential scanning calorimetry (DSC); and the interaction between gallic acid and zein was attested by attenuated total reflection-Fourier transform infrared (ATR-FTIR). Thermogravimetric analysis (TGA) demonstrated a different thermal stability of the fabricated complex before and after the gallic acid incorporation. Lastly, the 1,1′-diphenyl-2-picrylhydrazyl (DPPH) assay showed that the gallic acid had retained its antioxidant activity after incorporation in zein electrospun fibres. Overall, electrospinning technique had shown promising results as an efficient and effective method for the preparation of sub-micron structured encapsulated functional ingredient that may find uses in food industry.