Mechanical and barrier properties of corn distarch phosphate-zein bilayer films by thermocompression

Sun, Hong; Shao, Xinru; Jiang, Ruiping; Shen, Zhimin; Ma, Zhongsu

doi:10.1016/j.ijbiomac.2018.07.069

Cited by 34 publications

(25 citation statements)

References 39 publications

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“…Antibiotics 2020, 9, x; doi: FOR PEER REVIEW www.mdpi.com/journal/antibiotics of both layers of the film, presenting high essential oil concentration, as it was reported earlier by other authors [5]. This interface region between the two layers of the film with licorice essential oil suggests the potential migration of the essential oil from the pullulan layer (more hydrophilic) to the zein layer (more hydrophobic), which was not verified by FTIR analysis, as mentioned above.…”

Section: Microstructure Of Bilayer Filmssupporting

confidence: 67%

“…The presence of microdroplets is even more evident in this film, indicating the proper incorporation of licorice essential oil in the biopolymeric matrix. Moreover, the zein layer appears to be different, probably because of chemical interactions that occur between the essential oil and zein molecules via hydrogen bonds in the interface region (highlighted in Figure 2b) of both layers of the film, presenting high essential oil concentration, as it was reported earlier by other authors [5]. This interface region between the two layers of the film with licorice essential oil suggests the potential migration of the essential oil from the pullulan layer (more hydrophilic) to the zein layer (more hydrophobic), which was not verified by FTIR analysis, as mentioned above.…”

Section: Microstructure Of Bilayer Filmssupporting

confidence: 57%

“…One of the most diffused techniques is the use of multilayer films [ 4 ], specifically bilayer films are a promising option to improve their overall properties. Using biodegradable polymers, a bilayer combination can complement the film-forming properties of each polymer, taking advantage of the best characteristics of each individual one [ 5 , 6 ]. Unlike blends, bilayer films present a heterogeneous structure where the intrinsic properties of each polymer are preserved on the corresponding layer of the film.…”

Section: Introductionmentioning

confidence: 99%

“…The licorice essential oil (active agent) was incorporated on pullulan internal layer, taking advantage of its hydrophilicity, which will facilitate the release of isopropyl palmitate (major compound) to the packaged food product. The external layer is composed by zein, whose films have good water barrier properties due to its hydrophobicity [ 5 ]. After the production of the bilayer films, they were fully characterized in terms of their chemical, physical, barrier, antioxidant, and antimicrobial properties.…”

Section: Introductionmentioning

confidence: 99%

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Design and Characterization of Bioactive Bilayer Films: Release Kinetics of Isopropyl Palmitate

et al. 2020

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Active packaging incorporating antioxidants and antimicrobials is creating a niche in the market and becoming increasingly important. The main goal of this work was the design of bioactive bilayer films (zein/pullulan) incorporating licorice essential oil. The bilayer films were fully characterized in terms of their chemical, physical, barrier, antioxidant, and antimicrobial properties. Furthermore, the release kinetics of isopropyl palmitate, the major compound of the licorice essential oil, was evaluated by HPLC-DAD (high-performance liquid chromatography coupled to diode-array detector). Scanning Electron Microscopy (SEM) micrographs of cross-sections of the bilayer films clearly show the two layers of the films. Besides presenting the capacity to scavenge free radicals and to inhibit the lipid peroxidation, the developed bilayer films were also able to inhibit the growth of known foodborne pathogens (Enterococcus faecalis and Listeria monocytogenes). The release kinetics profile of isopropyl palmitate from bilayer films incorporating licorice essential oil demonstrated that in 50% ethanol at room temperature, the release was more effective, suggesting that the bilayer films will be more efficient if applied to package semi-fatty food.

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Section: Microstructure Of Bilayer Filmssupporting

confidence: 67%

Section: Microstructure Of Bilayer Filmssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Characterization of Bioactive Bilayer Films: Release Kinetics of Isopropyl Palmitate

et al. 2020

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“…PCL/gelatin fibers had a wide diameter distribution, whilst PCL/zein, and PCL/keratin fibers had comparably narrow distributions. On the other hand, keratin have more hydrophilic side chain chemical groups (e.g., Bunte salts) that promoted a decrease in water contact angle, in comparison to zein, which is partially hydrophobic, being rich in hydrophobic and neutral amino acids as well as some sulfur-containing amino acids but lacking in polar/ionizable amino acids [39]. Hence, surface properties of fibers with different wettability were also tested in vitro in order to evaluate the different behavior of hMSCs in the presence of the different proteins.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study on Protein-Rich Electrospun Fibers for In Vitro Applications

et al. 2020

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Electrospinning is the leading technology to fabricate fibrous scaffolds that mimic the architecture of the extracellular matrix of natural tissues. In order to improve the biological response, a consolidated trend involves the blending of synthetic polymers with natural proteins to form protein-rich fibers that include selected biochemical cues able to more actively support in vitro cell interaction. In this study, we compared protein-rich fibers fabricated via electrospinning by the blending of poly ε-caprolactone (PCL) with three different proteins, i.e., gelatin, zein, and keratin, respectively. We demonstrated that the peculiar features of the proteins used significantly influence the morphological properties, in terms of fiber size and distribution. Moreover, keratin drastically enhances the fiber hydrophilicity (water contact angle equal to 44.3° ± 3.9°) with positive effects on cell interaction, as confirmed by the higher proliferation of human mesenchymal stem cells (hMSC) until 7 days. By contrast, gelatin and zein not equally contribute to the fiber wettability (water contact angles equal to 95.2° ± 1.2° and 76.3° ± 4.0°, respectively) due to morphological constraints, i.e., broader fiber diameter distribution ascribable to the non-homogeneous presence of the protein along the fibers, or chemical constrains, i.e., large amount of non-polar amino acids. According to in vitro experimental studies, which included SEM and confocal microscopy analyses and vitality assay, we concluded that keratin is the most promising protein to be combined with PCL for the fabrication of biologically instructive fibers for in vitro applications.

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Protein‐Based Films and Coatings

Purkayastha

Kumar

2022

Biopolymer‐Based Food Packaging

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Mechanical and barrier properties of corn distarch phosphate-zein bilayer films by thermocompression

Cited by 34 publications

References 39 publications

Design and Characterization of Bioactive Bilayer Films: Release Kinetics of Isopropyl Palmitate

Design and Characterization of Bioactive Bilayer Films: Release Kinetics of Isopropyl Palmitate

Comparative Study on Protein-Rich Electrospun Fibers for In Vitro Applications

Protein‐Based Films and Coatings

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