Novel functional material incorporating flexirubin‐type pigment in polyvinyl alcohol_kefiran/polycaprolactone nanofibers

Abstract

In this study, needleless electrospinning technology was used to obtain flexirubin (F)‐loaded polyvinyl alcohol (PVA)_kefiran (KF)/polycaprolactone (PCL) electrospun nanofibers. The SEM images of PVA_KF_ F and PCL_F nanofibers displayed beadless morphology with average diameters of 211.90 ± 96.08 and 1610.71 ± 996.68 nm, respectively. FTIR‐ATR analysis revealed increased intensity at specific wavelengths, after pigment incorporation. The high porosity exhibited by each layer and the mechanical properties of the double‐layered nanofibrous material remained unaffected after flexirubin‐type pigment incorporation. In addition, PVA_KF_F/PCL_F nanofibers showed antioxidant activity of 41.03 ± 0.29%, evaluated by the scavenging of the ABTS radical as well as the ability to reduce enzymatic browning of apple slices. Thus, we believe that the fabricated PVA_KF_F/PCL_F double‐layered material can be considered for application in active food packaging systems.

Historically Inspired Strategy to Achieve Sustainable and Effective Coloration of Bioplastics

“…PCL sample shows a rough and compact surface, characteristic of tough materials while the inclusion of 0.1% wt of LWP induces a slight increase in roughness compared to the matrix, probably due to the presence of the nanometric pigment which in small quantities works as a concentrator of internal stresses. When the LWP content is increased to 1% wt, the surface becomes less jagged and the roughness decreases suggesting that LWP favors internal creep as a sort of plasticizer. , The fractured surface of PBS appears rough and segmented with the typical morphology of a rigid and tough material, whereas the PBS_0.1LWP sample takes on a less-wrinkled appearance, indicating a less tenacious behavior; with 1% wt of LWP in PBS, the fracture shows an evident reduction of the roughness, suggesting a more rigid and brittle behavior at break of the material. Unlike PCL-based samples, in PBS the pigment seems to interface better and work as a reinforcement.…”

Electrospun fiber materials based on polysaccharides and natural colorants for food packaging applications

“…It shifted from bright pink at pH 9 to vivid coral red at pH 10, orange at pH 11, and yellow from pH 12 to 14 (Amorim et al 2022c). In turn, flexirubin-type pigments are yellowish-orange pigments produced by various genera, including Flexibacter, Cytophaga, Sporocytophaga, and Chryseobacterium (Amorim et al 2022b). These pigments are recognized for their antioxidant and antimicrobial properties, as well as their appealing color in packaging that engages consumers' attention.…”

“…As previously mentioned, needleless electrospinning offers a significant advantage over traditional needle-based methods by providing a more efficient and scalable process. Amorim et al (2022b) and Amorim et al (2022d) reported the production of double-layer structures for active food packaging applications produced by needleless electrospinning (Amorim et al 2022b, d). In one of their works, double-layer materials were produced with an inner layer of nanofibers made from electrospun polyvinyl alcohol (PVA) and CH and an outer layer of oxidized BC to provide mechanical support.…”

Production, Extraction and Partial Characterization of Natural Pigments from Chryseobacterium sp. kr6 Growing on Feather Meal Biomass

“…In this regard, polymeric nanofibers incorporating flexirubin showed ABTS radical scavenging activity and the ability to reduce enzymatic browning of apple slices. Thus, the fabricated material has potential for application in active packaging systems [44]. Due to their properties, flexirubins have been proposed as useful dyes in textiles, food and pharma industries [6,36,40].…”