Encapsulation of Ascorbyl Palmitate in Zein by Electrospinning Technique

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 N 2 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.

Encapsulation of rosemary essential oil in zein by electrospinning technique

“…It is reported that the most significant parameter in controlling the morphology and diameter of electrospun fibers during electrospinning process is the concentration of solution. With increasing concentration, the diameter of the fiber also increases; this is probably due to the greater resistance of the high concentration solutions to be stretched toward the collector (Heydari‐Majd et al., 2019; Miri et al., 2020; Teo & Ramakrishna, 2006). Another reason may be attributable to the electrical conductivity of the solutions.…”

“…The AFM images show the tubular shape of electrospun fibers better than SEM images. It seems that the tubular‐shaped fibers are formed when a highly volatile solvent system such as acetic acid is used for electrospinning (Miri et al, 2020). It could be concluded that encapsulation of rosemary essential oil did not alter the morphology of zein electrospun fibers, but the electrospun fiber diameter increased with increasing essential oil concentration.…”

“…The peak at 2930 cm −1 corresponded with aliphatic C‐H stretching bands (Miri et al., 2020). Two peaks at 1624 cm −1 (C═O stretching bands) and 1534 cm −1 (C‐N stretching bands adjoined to N‐H bending) are known as amide I and amide II, respectively (Miri et al., 2020). The spectra of fibers that were loaded with essential oil are not merely a simple superposition of the spectra of zein and rosemary essential oil.…”

“…Luo et al, 2019) Characteristic peaks of the neat zein fibers include a broad peak centered at 3416 cm −1 which is due to N-H and OH stretching bands. The peak at 2930 cm −1 corresponded with aliphatic C-H stretching bands (Miri et al, 2020). Two peaks at 1624 cm −1 (C═O stretching bands) and 1534 cm −1 (C-N stretching bands adjoined to N-H bending) are known as amide I and amide II, respectively (Miri et al, 2020).…”

AI-Driven Optimization of PCL/PEG Electrospun Scaffolds for Enhanced In Vivo Wound Healing

“…Chitin, chitosan, , and scaffolds derived from hyaluronic acid are also notable choices. Protein-based polymers such as gelatin, , collagen, zein, , and soy are employed for creating scaffolds that closely mimic the extracellular matrix (ECM). The advantage of natural polymers lies in their ability to dissolve without aggressive chemical solvents.…”