scholarly journals Bioactive Characterization of Packaging Foils Coated by Chitosan and Polyphenol Colloidal Formulations

2020 ◽  
Vol 21 (7) ◽  
pp. 2610 ◽  
Author(s):  
Sanja Potrč ◽  
Meta Sterniša ◽  
Sonja Smole Možina ◽  
Maša Knez Hrnčič ◽  
Lidija Fras Zemljič
Keyword(s):  
Antioxidant Activity ◽  
Chitosan Nanoparticles ◽  
Barrier Properties ◽  
Point Of View ◽  
Desorption Kinetics ◽  
Nanoparticle Dispersions ◽  
Industry Applications ◽  
Antimicrobial And Antioxidant Activity ◽  
Uv Ozone

Polypropylene (PP) and polyethylene (PE) foils, previously activated by ultraviolet (UV)/ozone, were functionalized using chitosan-extract nanoparticle dispersions. A solution of macromolecular chitosan was applied onto foils as a first layer, followed by the deposition of various extracts encapsulated into chitosan nanoparticles, which were attached as an upper layer. Functionalized foils were analyzed from a bioactive point of view, i.e., regarding antimicrobial and antioxidant activity. Desorption kinetics were also studied. Moreover, barrier properties were examined, as the most important parameter influencing antimicrobial and antioxidant activity. Finally, all these properties were correlated with different surface parameters, determined previously, in order to understand if there is any direct correlation between surface elemental composition, surface charge, contact angle, or morphology and a specific bioactive property. It was shown that great bioactive properties were introduced due to the additive effect of antimicrobial chitosan and antioxidative plant extracts. Moreover, oxygen permeability decreased significantly, and the migration of polyphenols and chitosan from the foil surface was below the OML (overall migration limit), which is very important for food industry applications. Furthermore, surface properties of foils influence to some extent the desired bioactivity.

scholarly journals Physicochemical Characterization of Packaging Foils Coated by Chitosan and Polyphenols Colloidal Formulations

2020 ◽  
Vol 21 (2) ◽  
pp. 495 ◽  
Author(s):  
Lidija Fras Zemljič ◽  
Olivija Plohl ◽  
Alenka Vesel ◽  
Thomas Luxbacher ◽  
Sanja Potrč
Keyword(s):  
Surface Charge ◽  
Elemental Composition ◽  
Chitosan Nanoparticles ◽  
Physicochemical Characterization ◽  
Surface Characteristics ◽  
Nanoparticle Dispersions ◽  
Physico Chemical ◽  
Additive Formulation ◽  
Uv Ozone

In this research, antimicrobial polysaccharide chitosan was used as a surface coating for packaging material. The aim of our research was to establish an additive formulation of chitosan and antioxidative plant extracts as dispersion of nanoparticles. Chitosan nanoparticles with embedded thyme, rosemary and cinnamon extracts were synthesized, and characterized for this purpose. Two representative, commercially used foils, polypropylene (PP) and polyethylene (PE), previously activated by UV/ozone to improve coating adhesion, were functionalized using chitosan-extracts nanoparticle dispersions. The foils were coated by two layers. A solution of macromolecular chitosan was applied onto foils as a first layer, followed by the deposition of various extracts embedded into chitosan nanoparticles that were attached as an upper layer. Since active packaging must assure bioactive efficiency at the interface with food, it is extremely important to understand the surface characteristics and phenomena of functionalized foils. The physico-chemical analyses of functionalized foils were thus comprised of surface elemental composition, surface charge, wettability, as well as surface morphology. It has been shown that coatings were applied successfully with an elemental composition, surface charge and morphology that should enable coating stability, homogeneity and consequently provide an active concept of the packaging surface in contact with food. Moreover, the wettability of foils was improved in order to minimize the anti-fogging behavior.

scholarly journals Characterization and Antioxidant Activity of Mahogany Bark Extract-loaded Chitosan Nanoparticles

2017 ◽  
Vol 4 (1) ◽  
pp. 94-99
Author(s):  
Syamsul Falah ◽  
Sulistiyani Sulistiyani ◽  
Dimas Andrianto
Keyword(s):  
Antioxidant Activity ◽  
Sodium Tripolyphosphate ◽  
Chitosan Nanoparticles ◽  
Spherical Shape ◽  
Water Soluble ◽  
Bark Extract ◽  
X Ray Diffraction ◽  
Water Soluble Drugs ◽  
Radical Method

Nanoparticles-based drug delivery has been recognized to improve the solubility of poorly water-soluble drugs, prolong the half-life of drug systematic circulation by reducing immunogenicity, and releases drugs at a sustain rate. The present study reports on the characterization of mahogany bark extract-loaded chitosan nanoparticles and their antioxidant activity.  Mahogany bark meal was extracted in boiled water for four hours.  Chitosan-sodium tripolyphosphate (STPP) nanospheres were sonicated with ultrasonicator to obtain chitosan-STTP nanocapsules for 30 and 60 min and then were dried with spray dryer. The chitosan-STPP nanocapsules loaded by mahogany extract were then analysed for surface morphology and physical state by scanning electron microscope (SEM) and X ray diffraction (XRD), respectively. Antioxidant activity of the nanoparticles was evaluated by scavenging the 1,1-diphenyl-2-picrylhydrazyl (DPPH) using free radical method. Based on SEM data, the nanoparticle shapes were viewed to adhere to spherical shape. Spherical chitosan-STTP nanoparticles loaded with mahogany bark extract were obtained in the size range of 480 ~ 2000 nm and 240 ~ 1000 nm for 30 and 60 min of ultrasonication time, respectively. The antioxidant activity of the nanoparticles was lower than that of the native mahogany bark extract. 

scholarly journals PLA-Based Materials Containing Bio-Plasticizers and Chitosan Modified with Rosehip Seed Oil for Ecological Packaging

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1610
Author(s):  
Raluca Nicoleta Darie-Niță ◽  
Maria Râpă ◽  
Morten Sivertsvik ◽  
Jan Thomas Rosnes ◽  
Elisabeta Elena Popa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Food Packaging ◽  
Seed Oil ◽  
Antioxidant Properties ◽  
Point Of View ◽  
Melt Mixing ◽  
Melt Compounding ◽  
Antioxidant Characteristics ◽  
Antimicrobial And Antioxidant Activity ◽  
Cold Pressed

Several recipes based on PLA, bio-plasticizers, and active agents such as vitamin E and cold-pressed rosehip seed oil encapsulated into chitosan by the emulsion method named here as chitosan modified (CS-M) were elaborated by melt compounding for food packaging applications. Resulted biocomposites have been investigated from the point of view of physical-mechanical, thermal, barrier, antimicrobial, and antioxidant properties to select the formulations with the optimum features to produce food trays and films for packaging applications. The obtained results showed that the elaborated formulations exhibit tensile strength and flexibility dependent on their composition being either rigid or flexible, as well as antimicrobial and antioxidant activity, which will potentially lead to prolonged use for food packaging. The recipe with PLA matrix and 40:60 Lapol®108 as masterbarch/polyethylene glycol (MB/PEG) bio-plasticizers ratio was distinguished by an improvement of over 100 times in terms of flexibility compared with neat PLA, while the highest antioxidant activity (36.27%) was recorded for the sample containing a CS-M and MB/PEG ratio of 60:40. An enhancement of ~50% for the water vapor barrier was recorded for PLA/CS-M_100:0 material. By modulating the MB and PEG bio-plasticizers ratio, the design of new eco-friendly food packaging materials with antimicrobial/antioxidant characteristics by using the existing technologies for processing synthetic polymers (melt mixing, compounding, pressing, thermoforming) has been successfully realized.

scholarly journals Preparation and Characterization of Cinnamomum Essential Oil–Chitosan Nanocomposites: Physical, Structural, and Antioxidant Activities

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 834 ◽  
Author(s):  
Hongxia Su ◽  
Chongxing Huang ◽  
Ying Liu ◽  
Song Kong ◽  
Jian Wang ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oil ◽  
Antioxidant Activities ◽  
Chitosan Nanoparticles ◽  
Weight Ratio ◽  
Size Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oil In Water

In this study, different amounts of cinnamomum essential oil (CEO) were encapsulated in chitosan nanoparticles (NPs) (CS-NPs) through oil-in-water emulsification and ionic gelation. An ultraviolet-visible spectrophotometer, Fourier-transform infrared spectroscopy, synchronous thermal analysis, and X-ray diffraction were employed to analyze the CEO encapsulation. As observed by field-emission scanning electron microscopy, NP size analysis and zeta potential, the prepared CS-NPs, containing CEO (CS-CEO), were spherical with uniformly distributed sizes (diameters: 190–340 nm). The ranges of encapsulation efficiency (EE) and loading capacity (LC) were 4.6–32.9% and 0.9–10.4%, with variations in the starting weight ratio of CEO to CS from 0.11 to 0.53 (w/w). It was also found that the antioxidant activity of the CS-NPs loaded with CEO increased as the EE increased. The active ingredients of the CEO were prevented from being volatilized, significantly improving the chemical stability. The antioxidant activity of CS-CEO was higher than that of the free CEO. These results indicate the promising potential of CS-CEO as an antioxidant for food processing, and packaging applications.

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