Influence of O2 and CO2 plasma treatment on the deposition of chitosan onto polyethylene terephthalate (PET) surfaces

Tkavc, Tina; Petrinić, Irena; Luxbacher, Thomas; Vesel, Alenka; Ristić, Tijana; Zemljič, Lidija Fras

doi:10.1016/j.ijadhadh.2013.09.008

Cited by 43 publications

(33 citation statements)

References 38 publications

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“…Moreover, a cleaning effect from organic non-polar contaminants and changes in the foil morphology were expected, which contributed to the higher negative zeta potential and the shift in the IEP. A similar effect on the surface zeta potential was observed for a poly (ethylene terephthalate) PE foil activated by O 2 -and CO 2 -plasma treatment, respectively [38]. Foils which were coated by the 2% macromolecular chitosan solution (as the first coating layer), PE-2%CS, show clearly the successful attachment of chitosan onto the PE foil.…”

Section: Surface Zeta Potentialsupporting

confidence: 68%

“…The non-zero zeta potential and the IEP at pH 4 were determined by the adsorption of water ions at hydrophobic surfaces. Above pH 4, the adsorption of hydroxide ions dominated and generated a negative interfacial charge, which was detected by the zeta potential [38]. At pH 4, the concentration of adsorbed OH − ions equaled that of H 3 O + ions.…”

Section: Surface Zeta Potentialmentioning

confidence: 99%

“…pH 4, the PE-water interface was negatively charged, whereas at low pH, the sign of this interfacial charge reversed to positive. This behavior is typical for a polymer or any other hydrophobic material surface without any surface functional groups [37,38]. The non-zero zeta potential and the IEP at pH 4 were determined by the adsorption of water ions at hydrophobic surfaces.…”

Section: Surface Zeta Potentialmentioning

confidence: 99%

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

Zemljič

Plohl

Vesel

et al. 2020

IJMS

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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.

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Section: Surface Zeta Potentialsupporting

confidence: 68%

Section: Surface Zeta Potentialmentioning

confidence: 99%

Section: Surface Zeta Potentialmentioning

confidence: 99%

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

Zemljič

Plohl

Vesel

et al. 2020

IJMS

Self Cite

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“…Plasma treatment could also be used as a tool for surface activation prior to immobilization or grafting of bioactive components on the materials. Thus, it was previously shown to be effective for subsequent immobilization of various bioactive components [13][14][15][16][17][18]. Chitosan is one of the widely used natural polymers for immobilization, because of its biocompatibility, biodegradability, antibacterial activity and its ability to act as a site for binding of other bioactive components or cell attachment [19].…”

Section: Introductionmentioning

confidence: 99%

Plasma Treatment of Poly(ethylene terephthalate) Films and Chitosan Deposition: DC- vs. AC-Discharge

et al. 2020

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Plasma treatment is one of the most promising tools to control surface properties of materials tailored for biomedical application. Among a variety of processing conditions, such as the nature of the working gas and time of treatment, discharge type is rarely studied, because it is mainly fixed by equipment used. This study aimed to investigate the effect of discharge type (direct vs. alternated current) using air as the working gas on plasma treatment of poly(ethylene terephthalate) films, in terms of their surface chemical structure, morphology and properties using X-ray photoelectron spectroscopy, scanning electron microscopy, atomic force microscopy and contact angle measurements. The effect of the observed changes in terms of subsequent chitosan immobilization on plasma-treated films was also evaluated. The ability of native, plasma-treated and chitosan-coated films to support adhesion and growth of mesenchymal stem cells was studied to determine the practicability of this approach for the biomedical application of poly(ethylene terephthalate) films.

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“…[20][21][22][23][24] Due to its great bioactive properties, chitosan may be an ideal potential substance for polyethylene coatings -in line with the active packaging concept. [25][26][27][28][29] Due to its bacteriostatic function, it prolongs the lag phase and, consequently, reduces the growth rate of microorganisms, thus extending the shelf-life of products and maintaining product quality and safety. 30,31 Although there are several contributions focusing on the use of chitosan in different structural forms or on its combination with other antimicrobial/antioxidant agents for food preservation, [30][31][32][33] there has been little work done on the use of complementary synergistic formulations of chitosan and pullulan.…”

Section: Introductionmentioning

confidence: 99%

Pullulan-Chitosan Coatings Onto Polyethylene Foils for the Development of Active Packaging Material

Zemljič¹,

Ulrih²,

Sterniša³

et al. 2019

Cellulose Chem. Technol.

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Polyethylene (PE) material in the form of foils as conventional packaging material was functionalised with polysaccharide pullulan and an additional layer of chitosan macromolecular solution. In this study, the best concentration of pullulan (10%, 20% or 30%) was determined with the objective of improving the barrier properties of conventional PE food packaging material. As additional layer, a chitosan macromolecular solution was adsorbed to the material in order to endow it with antimicrobial activity. In this way, a functional composite material was developed, which can find potential application as active packaging, to offer prolonged shelf-life to packaged food. The functionalized PE material was analysed from the physico-chemical point of view (gravimetric analysis, goniometry, FTIR spectroscopy, standard test for oxygen permeability, SEM analysis). Moreover, antimicrobial testing of the foils was done and the desorption of both polysaccharides from the PE surface was evaluated. The latter properties are essential when evaluating the practical value of active packaging.

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Influence of O2 and CO2 plasma treatment on the deposition of chitosan onto polyethylene terephthalate (PET) surfaces

Cited by 43 publications

References 38 publications

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

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

Plasma Treatment of Poly(ethylene terephthalate) Films and Chitosan Deposition: DC- vs. AC-Discharge

Pullulan-Chitosan Coatings Onto Polyethylene Foils for the Development of Active Packaging Material

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