Encapsulation of Ascorbyl Palmitate in Zein by Electrospinning Technique
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ORIGINAL PAPER
Encapsulation of Ascorbyl Palmitate in Zein by Electrospinning Technique Mohammad Amin Miri1 · Mohammad B. Habibi Najafi2 · Jebrail Movaffagh3 · Behrouz Ghorani4 Accepted: 24 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this study, ascorbyl palmitate was encapsulated in electrospun zein fibers at different loading levels (2.5%w/v, 5%w/v and 10% w/v). HPLC, SEM, FTIR, XRD, DSC and BET characterized the resulting electrospun zein fibers containing ascorbyl palmitate. Results indicated that the diameters of electrospun zein fibers increased with increasing concentration of ascorbyl palmitate. The physical status of ascorbyl palmitate in electrospun zein fibers was determined by X-ray diffraction (XRD), and differential scanning calorimetry (DSC). Fourier transform infrared (FTIR) was used to study the interaction between ascorbyl palmitate, and zein. The results showed that there was hydrogen bonding between protein and ascorbyl palmitate. Pore size was characterized by N2 adsorption–desorption isotherms. Contact angle results showed that hydrophobicity of electrospun fiber mats was not affected by ascorbyl palmitate. Encapsulation efficiency of ascorbyl palmitate in electrospun zein fibers was about 22.5–65.5% w/v. Release study results indicated that pH and morphology affected the release. This is the first report describing that ascorbyl palmitate was successfully encapsulated in electrospun zein fibers. This product is intended to be used as an active coating for the delivery of ascorbyl palmitate to butter and other food products. Keywords Ascorbyl palmitate · Zein · Electrospinning · Electro-encapsulation
Introduction Ascorbyl palmitate (AP), also known as vitamin C palmitate, has been used as a source of vitamin C, and as an antioxidant for foods, pharmaceuticals, and cosmetics [1]. Mohammad B. Habibi Najafi and Jebrail Movaffagh equally contributed. * Mohammad B. Habibi Najafi [email protected] * Jebrail Movaffagh [email protected] 1
Department of Food Science and Technology, University of Zabol, Zabol, Iran
2
Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), P. O. Box 91775‑1163, Mashhad, Iran
3
Department of Pharmaceutics, Faculty of Pharmacy, Targeted Drug Delivery Research Center, Stem Cell Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
4
Department of Food Nanotechnology, Research Institute of Food Science and Technology, km 12 Mashhad‑Quchan Highway, P.O.Box 91895‑157‑356, Mashhad, Iran
Although ascorbyl palmitate is more stable than vitamin C, low chemical stability limits its utilization. The main problem of ascorbyl palmitate is its oxidation mediated by transition metal ions presented in traces. Besides oxygen, light can also accelerate the oxidative degradation of ascorbyl palmitate. Ascorbyl palmitate is gradually oxidized, and becomes discolored when exposed to light and a high humidity [2]. Encapsulation potentially can protect active molecules from d
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