The influence of UV-irradiation on chitosan modified by the tannic acid addition

Sionkowska, Alina; Kaczmarek, Beata; Gnatowska, M.; Kowalonek, Jolanta

doi:10.1016/j.jphotobiol.2015.03.028

Cited by 57 publications

(16 citation statements)

References 25 publications

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“…This might be due to the formation of crosslinked structures. Similar behaviour of degradation and crosslinking stemming from UV irradiation for Cs has been reported by Sionkowska et al …”

Section: Resultssupporting

confidence: 86%

“…This might be due to the formation of crosslinked structures. Similar behaviour of degradation and crosslinking stemming from UV irradiation for Cs has been reported by Sionkowska et al 89 Due to its ability to suppress the unwanted parasitic effects such as electrode polarization that may mask the dielectric response of a sample, the imaginary part of the electric modulus, M ′′ , is preferred in presenting dielectric data, particularly for composites. 43 The imaginary part of electric modulus under isothermal conditions for Cs, PPy-NPs and PPy/Cs nanocomposites is depicted Fig.…”

Section: Molecular Dynamicssupporting

confidence: 55%

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Structure and dynamics of polypyrrole/chitosan nanocomposites

Ali

Elmahdy

Sarhan

et al. 2018

Polymer International

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Polypyrrole/chitosan (PPy/Cs) nanocomposites with various amounts of polypyrrole nanoparticles (PPy‐NPs) have been synthesized and afterwards exposed to UV irradiation for 240 min. Structure, dynamics and antibacterial activity of pure compounds and the corresponding nanocomposites were investigated by means of wide‐angle X‐ray scattering, Fourier transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, broadband dielectric spectroscopy and antibacterial activity assay. The occurrence of a pronounced interaction between PPy‐NPs and Cs has been verified. Broadband dielectric spectroscopy measurements revealed two relaxation processes at low and high frequencies. The low‐frequency α‐relaxation associated with the glass–rubber transition is attributed to the presence of hydrogen‐bonded water (plasticizing effect) appearing at low temperature (<373 K). The high‐frequency σ‐relaxation is related to water molecules which become desorbed upon heating at T > 373 K and demonstrates Arrhenius temperature dependence with activation energy in the range 70–90 kJ mol−1 in good agreement with previous reports. On the contrary, PPy‐NPs do not show any structural relaxation process and the charge transport mechanism follows the correlated barrier hopping model. All PPy/Cs nanocomposites exhibit an improved antibacterial activity against both Staphylococcus aureus and Escherichia coli bacteria as compared with pure Cs and PPy‐NPs. © 2018 Society of Chemical Industry

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“…This might be due to the formation of crosslinked structures. Similar behaviour of degradation and crosslinking stemming from UV irradiation for Cs has been reported by Sionkowska et al …”

Section: Resultssupporting

confidence: 86%

Section: Molecular Dynamicssupporting

confidence: 55%

Structure and dynamics of polypyrrole/chitosan nanocomposites

Ali

Elmahdy

Sarhan

et al. 2018

Polymer International

View full text Add to dashboard Cite

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“…In relation to chitosan and chitosan/montmorillonite materials crosslinked by glutaraldehyde, roughness parameters’ values were lower after modifications [ 3 ]. In the case of chitosan films crosslinked with tannic acid, a similar correlation to the one in our research was observed [ 45 ]. Roughness parameters’ values were higher for chitosan with 5 and 20% of tannic acid content, as the crosslinking agent.…”

Section: Resultssupporting

confidence: 90%

Examining the Impact of Squaric Acid as a Crosslinking Agent on the Properties of Chitosan-Based Films

Olewnik-Kruszkowska

Gierszewska

Grabska-Zielińska

et al. 2021

IJMS

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Hydrogels based on chitosan are very versatile materials which can be used for tissue engineering as well as in controlled drug delivery systems. One of the methods for obtaining a chitosan-based hydrogel is crosslinking by applying different components. The objective of the present study was to obtain a series of new crosslinked chitosan-based films by means of solvent casting method. Squaric acid—3,4-dihydroxy-3-cyclobutene-1,2-dione—was used as a safe crosslinking agent. The effect of the squaric acid on the structural, mechanical, thermal, and swelling properties of the formed films was determined. It was established that the addition of the squaric acid significantly improved Young’s modulus, tensile strength, and thermal stability of the obtained materials. Moreover, it should be stressed that the samples consisting of chitosan and squaric acid were characterized by a higher swelling than pure chitosan. The detailed characterization proved that squaric acid could be used as a new effective crosslinking agent.

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“…Our previous studies of UVC influence on the chitosan/tannic acid films showed that it modifies the material properties. However, we did not consider their antibacterial activity [ 43 ].…”

Section: Discussionmentioning

confidence: 99%

The Physicochemical and Antibacterial Properties of Chitosan-Based Materials Modified with Phenolic Acids Irradiated by UVC Light

Kaczmarek-Szczepańska

Wekwejt

Mazur

et al. 2021

IJMS

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This paper concerns the physicochemical properties of chitosan/phenolic acid thin films irradiated by ultraviolet radiation with wavelengths between 200 and 290 nm (UVC) light. We investigated the preparation and characterization of thin films based on chitosan (CTS) with tannic (TA), caffeic (CA) and ferulic acid (FA) addition as potential food-packaging materials. Such materials were then exposed to the UVC light (254 nm) for 1 and 2 h to perform the sterilization process. Different properties of thin films before and after irradiation were determined by various methods such as Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), differential scanning calorimeter (DSC), mechanical properties and by the surface free energy determination. Moreover, the antimicrobial activity of the films and their potential to reduce the risk of contamination was assessed. The results showed that the phenolic acid improving properties of chitosan-based films, short UVC radiation may be used as sterilization method for those films, and also that the addition of ferulic acid obtains effective antimicrobial activity, which have great benefit for food packing applications.

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The influence of UV-irradiation on chitosan modified by the tannic acid addition

Cited by 57 publications

References 25 publications

Structure and dynamics of polypyrrole/chitosan nanocomposites

Structure and dynamics of polypyrrole/chitosan nanocomposites

Examining the Impact of Squaric Acid as a Crosslinking Agent on the Properties of Chitosan-Based Films

The Physicochemical and Antibacterial Properties of Chitosan-Based Materials Modified with Phenolic Acids Irradiated by UVC Light

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