title: Encapsulation of food grade antioxidant in natural biopolymer by electrospinning technique: a physicochemical study based on zein-gallic acid system.
abstract: 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 387 nm. 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.
authors.affiliation: School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand.
authors.forename: Yun Ping
authors.initials: YP
authors.lastname: Neo
authors.forename: Sudip
authors.initials: S
authors.lastname: Ray
authors.forename: Jianyong
authors.initials: J
authors.lastname: Jin
authors.forename: Marija
authors.initials: M
authors.lastname: Gizdavic-Nikolaidis
authors.forename: Michel K
authors.initials: MK
authors.lastname: Nieuwoudt
authors.forename: Dongyan
authors.initials: D
authors.lastname: Liu
authors.forename: Siew Young
authors.initials: SY
authors.lastname: Quek
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D001704:Biopolymers / Q000737:chemistry*; D004339:Drug Compounding / Q000379:methods*; D004355:Drug Stability; D055664:Electrochemical Techniques / Q000379:methods*; D005707:Gallic Acid / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D015028:Zein / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D001704:Biopolymers; D005707:Gallic Acid; D015028:Zein