Kinetics and Antioxidant Capacity of Proanthocyanidins Encapsulated in Zein Electrospun Fibers by Cyclic Voltammetry

Abstract

The proanthocyanidins encapsulated in zein (zein-PA) fibers was via electrospinning technique. The kinetics and antioxidant capacity of PA from zein fibers was investigated by cyclic voltammetry. Circular dichroism was used to investigate the secondary structure change of zein and its influence on the shape of fibers. The addition of PA caused a significant increase in viscosity and made fibers wider. These hydrogen bonds between zein and PA molecules would favor the α-helix change and decrease the β-folds of zein in electrospinning solutions, leading to a round-shaped tendency of fibers and enhancing the thermal properties slightly. Zein-PA fibers showed high encapsulation efficiency close to 100%, and the encapsulated PA retained its antioxidant capacity in fibers. Zein-PA fibers showed a good controlled release toward PA, and the predominant release of PA from fibers was Fickian diffusion, which could be well described by first-order model and Hixson-Crowell model.

Biocompatible and Biodegradable Electrospun Nanofibrous Membranes Loaded with Grape Seed Extract for Wound Dressing Application

“…GSE is mainly composed of phenolic compounds, such as procyanidins, catechin, epicatechin, gallic acid, and gallic acid ester [2]. Typical bands of these phenolic compounds can be observed at 3300 cm -1 corresponding to stretching modes of the different −OH groups, at 1604 and 1520 cm -1 due to the −C=C−O deformation of the heterocyclic ring, at 1437 cm -1 attributed to the −CH deformation of the aromatic ring, at 1283 cm -1 associated with ester C−O stretching, and at 1104 cm -1 due to phenol and ether C−O stretching [34,38]. The FTIR spectrum of PLA displayed the characteristic carbonyl (C=O) absorption band at 1752 cm -1 , the C−O−C stretching bands at 1184 and 1086 cm -1 , while the peaks at 1453 and 1382 cm -1 are related to the C-H deformation [31].…”

“…where M t (mg) and M ∞ (mg) are the mass of GSE released at an arbitrary time t and at equilibrium, respectively, k is the release rate constant, and n indicates the release exponent suggesting the nature of the release mechanism [34]. Data acquired from in vitro drug release studies were plotted as log cumulative percentage drug release versus log time.…”

Active Food Packaging Coatings Based on Hybrid Electrospun Gliadin Nanofibers Containing Ferulic Acid/Hydroxypropyl-Beta-Cyclodextrin Inclusion Complexes

“…DSC was carried out to investigate the thermal properties of electrospun pure gliadin, G-FA, and G-FA/HP-β-CD-IC fibers. The DSC thermogram of the pure gliadin fiber exhibited a single endothermic at 80 °C, which has been normally termed as dehydration temperature ( T d ), corresponding the loss of bound water from the material [ 52 ]. The DSC thermograms of FA and FA/HP-β-CD-IC after incorporation into gliadin fibers were similar to gliadin fiber, showing a slight shift to around 74 °C and 73 °C, respectively; i.e., the high surface area of the generated materials facilitated water evaporation.…”

Electrospun curcumin-loaded protein nanofiber mats as active/bioactive coatings for food packaging applications

“…While zein fibers showed their characteristic flat, ribbon-like morphology, the gelatin fibers exhibited a more rounded shape. These differences in morphology have been attributed to the tendency of zein to form unexpanded β-folds (Wang et al, 2016), in contrast to the triple helix structure of gelatin (Guo, Colby, Lusignan, & Whitesides, 2003). Gelatin also yielded more homogeneous fibers and with smaller average diameters (230 ± 38 nm) than zein (360 ± 146 nm).…”