Characterization of Structural Modifications Induced on Poly(Vinyl Alcohol) Surface by Atmospheric Pressure Plasma

Rogojanu, A.; Rusu, Elena; Dorohoi, Dana Ortansa

doi:10.1080/10236661003743774

Cited by 14 publications

(10 citation statements)

References 26 publications

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“…Bands displacement can indicate interaction between the components of PVA and pomegranate, that is, the displacement of PVA bands around (1700–1750 cm −1 ) with the addition of dextran to PVA can be considered a hydrogen bonding formation between components . The PVA‐arnica samples presented, basically, the PVA bands, although some arnica bands, that is, bands at 1639, 1086, and 1045 cm −1 could be overlapped to PVA bands, Table . No new bands were found in PVA–pomegranate samples or in PVA‐arnica samples, indicating no chemical interactions .…”

Section: Resultsmentioning

confidence: 96%

Comparative analysis of PVA hydrogels incorporating two natural antimicrobials: Punica granatum and Arnica montana tinctures

Oliveira

Paranhos

Moreira

et al. 2017

J of Applied Polymer Sci

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Poly(vinyl alcohol) (PVA) hydrogels are biocompatible materials that retain relatively high amounts of aqueous fluids in their network. The incorporation of antimicrobial natural products, such as pomegranate and arnica, is a strategy for coupling their bactericidal effects with the favorable properties of the gels for wound healing treatment. The goal of this work was to investigate the microstructural, mechanical, and release properties of PVA-pomegranate and PVA-arnica samples. Physical interactions were observed by Fourier transform infrared spectra in PVA-pomegranate samples. The addition of pomegranate to PVA led to high T g , probably related to the physical interactions, and low T m and X c , possibly due to the pomegranate location between PVA chains. Increased levels of arnica were associated with a slight decrease in samples' X c , probably due to a physical barrier imposed by arnica to the interaction of PVA chains. PVA samples presented higher swelling than the samples containing natural products. High amounts of pomegranate in the samples led to high weight loss and high phenols and flavonoids delivery. Arnica release seemed to be more difficult than the pomegranate release. All samples presented relative high mechanical properties. In addition, pomegranate samples present higher potential to deliver active compounds than arnica samples.

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Section: Resultsmentioning

confidence: 96%

Comparative analysis of PVA hydrogels incorporating two natural antimicrobials: Punica granatum and Arnica montana tinctures

Oliveira

Paranhos

Moreira

et al. 2017

J of Applied Polymer Sci

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“…The FTIR bands of the samples and the propolis bands are displayed in Figure (b). PVA and propolis characteristic bands and vibration modes from the literature are displayed in Table .…”

Section: Resultsmentioning

confidence: 99%

PVA hydrogels loaded with a Brazilian propolis for burn wound healing applications

Oliveira

McGuinness

Rouze

et al. 2015

J of Applied Polymer Sci

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PVA hydrogels offer many suitable characteristics for burn wound dressings. However, unmodified PVA gels do not act against infection. Propolis is a natural antimicrobial agent suitable for incorporation into PVA gels. PVA-propolis gels were produced by freeze-thawing method, and their microstructure, mechanical, and swelling properties (in standard PBS and a PBS-based solution with pH 4.0) were characterized. The propolis release profiles and the gel's antibacterial and cytotoxicity properties were also investigated. The presence of propolis in the gels interfered with the PVA crystallization profile and with the mechanical properties. All samples swelled at least 400% in both media. The propolis was mostly released to the media in the first day of immersion. PVA-propolis gels with concentrations of 15% propolis or more were active against the gram-positive bacterium Staphylococcus aureus, which is associated with initial colonization of the wound. All PVA-propolis samples acted as barriers to microbial penetration.

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“…In addition, a new low intensive peak at 1713 cm −1 (CO stretching) was distinguished. This shows incorporation of oxidized functionality on the PVA145/Classic film surface after UV‐irradiation 29 . The absorbance at 1329 cm −1 (CH deformation band) enhanced and tended to become broad indicating the possible occurrence of crosslinking process on the film surface 29 .…”

Section: Resultsmentioning

confidence: 89%

“…It should be noted that for PVA145/Citrus films the demethoxylation process carried out more intensively after UV exposure compared with plasma treatment. Moreover, in the spectrum of PVA145/Citrus film after UV exposure a new band at 1710 cm −1 appeared which is related to the stretching vibrations of CO groups 27,29 . The intensity of the v (CO) bands at 1097 and 1020 cm −1 also decreased.…”

Section: Resultsmentioning

confidence: 94%

Polyvinyl alcohol and pectin blended films: Preparation, characterization, and mesenchymal stem cells attachment

Kraskouski

Hileuskaya

Kulikouskaya

et al. 2020

J Biomedical Materials Res

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The design of novel wound dressings for chronic wound treatment is still of great importance. One of the promising approaches is application of mesenchymal stem cells (MSCs), immobilized on a flexible polymer film, for healing. In this study, blended films based on polyvinyl alcohol (PVA) and pectin with different component ratio have been prepared by solution casting method and evaluated. Physicochemical properties of the formed PVA/pectin films, including their morphology, wettability, swelling, stability, mechanical characteristics, have been studied. We demonstrated that the surface of PVA/pectin films could be modified by ultraviolet or dielectric barrier discharge plasma exposure. After both ultraviolet and plasma treatment, the hydrophilicity of PVA/pectin films increased. It has been shown that additional crosslinking of PVA/pectin films with glutaraldehyde resulted in reinforcement of their structure. MSCs were cultured on neat and modified PVA/pectin samples to evaluate the effects of film characteristics and composition on cell behavior. It has been determined that MSCs effectively adhered to glutaraldehyde‐crosslinked PVA/pectin films and formed on them the monolayer culture of fibroblast‐like cells. The additional modification of PVA/pectin films with collagen resulted in enhancement of MSCs adhesion. Our results show that the obtained PVA/pectin films with adhered MSCs can be suggested for potential application as a part of novel complex wound dressings.

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Characterization of Structural Modifications Induced on Poly(Vinyl Alcohol) Surface by Atmospheric Pressure Plasma

Cited by 14 publications

References 26 publications

Comparative analysis of PVA hydrogels incorporating two natural antimicrobials: Punica granatum and Arnica montana tinctures

Comparative analysis of PVA hydrogels incorporating two natural antimicrobials: Punica granatum and Arnica montana tinctures

PVA hydrogels loaded with a Brazilian propolis for burn wound healing applications

Polyvinyl alcohol and pectin blended films: Preparation, characterization, and mesenchymal stem cells attachment

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