Red onion skin extract rich in flavonoids encapsulated in ultrafine fibers of sweet potato starch by electrospinning

Zein electrospun fibers with red onion extract (Allium cepa L.): Bioactive compounds, thermal stability, hydrophilicity, and antioxidant activity

“…In order to be considered an effective process, minimum values of 70% loading of the compounds are suggested so that the process becomes industrially viable (Cruz et al, 2022). The LC values reported in this study showed that the polymer used as wall material is highly effective for loading bioactive compounds.…”

“…One possibility of bioactive and/or volatile compound concentration is plant extract production, which consists of preparations with or without treatment (e.g., techniques such as maceration, infusion, continuous hot extraction, counter-current extraction, microwave-assisted extraction, ultrasound, and supercritical uid, among others) and/or temperatures and the use of solvents such as water and ethanol, among others (Cruz et al, 2022). Although these compounds have health bene ts, they mainly present undesirable odors when concentrated and applied directly to food matrices or packaging (Cecchi et al, 2020;.…”

A Brief Review on the Electrohydrodynamic Techniques Used to Build Antioxidant Delivery Systems from Natural Sources

“…The extracts of plants can be prepared by different techniques and can promote antimicrobial, antioxidant, anticancer, and anti-inflammatory activities [68][69][70]. These extracts can be obtained using different solvents, such as water, ethanol, and methanol, among others [71,72]. The solvent extraction method is the most used, but new technologies that are considered to be green are being applied [68].…”

“…Thus, they must be protected from the external environment. The microencapsulation of these extracts has been explored, namely using electrohydrodynamic techniques, as a way to protect, to maintain their bioavailability and functionality, and to facilitate the delivery of active compounds in food products [65,71,74]. For example, Vargas Romero et al ( 2021) studied the effect of propolis extract encapsulation by polycaprolactone nonwovens containing chitosan that was achieved for active packaging applications, namely the protection of meat products [75].…”

“…Electrospinning encapsulation is a highly viable method to protect bioactive ingredients and prevent their degradation. Cruz et al (2023) used red onion skin extract rich in flavonoids encapsulated in ultrafine fibres of sweet potato starch by electrospinning [71]. Aydin et al (2023) used Quercus infectoria gall-loaded patches for wound dressing [104] and they checked that the effect of the electrospinning, 3D printing, and hydrogel casting techniques on the properties of the wound dressings was exhibited.…”