Physicochemical properties of manganese oxides obtained via the sol–gel method: The reduction of potassium permanganate by polyvinyl alcohol

Иванец, А. И.; Prozorovich, Vladimir; Krivoshapkina, Elena F.; Kuznetsova, T. F.; Katsoshvili, L. L.

doi:10.1134/s0036024417080143

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…The higher swelling degree of thermal treated PLA-PVA/KMnO 4 bioscaffolds compared to non-thermal treated PLA-PVA/KMnO 4 bioscaffolds may be attributed to the formation of the carboxylic acid group by oxidation of PVK in the presence of KMnO 4 at an elevated temperature (80 °C). Therefore, the higher swelling degree of thermal treated PLA-PVA/KMnO 4 bioscaffolds is attributed to the higher polarity and hydrophilic character of the carboxylic acid [ 57 , 63 , 64 ]. Solvent residue analyses were performed and values of chloroform approximately 8 ppm were found.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal treating of PLA-PVA/KMnO 4 bioscaffolds caused partial oxidation of the formed PVK by KMnO 4 , and resulted in the formation of carboxylic acid groups. Carboxylic acids have a higher polarity and hydrophilic character in comparison with ketones (PVK) [ 57 , 63 , 64 ]. Therefore, thermally treated PLA-PVA/KMnO 4 bioscaffolds have a relatively higher hydrophilicity as compared to non-thermal treated PLA-PVA/KMnO 4 bioscaffolds.…”

Section: Resultsmentioning

confidence: 99%

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Polylactide/Polyvinylalcohol-Based Porous Bioscaffold Loaded with Gentamicin for Wound Dressing Applications

et al. 2021

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: This study explores the feasibility of modifying the surface liquid spraying method to prepare porous bioscaffolds intended for wound dressing applications. For this purpose, gentamicin sulfate was loaded into polylactide-polyvinyl alcohol bioscaffolds as a highly soluble (hygroscopic) model drug for in vitro release study. Moreover, the influence of inorganic salts including NaCl (10 g/L) and KMnO4 (0.4 mg/L), and post-thermal treatment (T) (80 °C for 2 min) on the properties of the bioscaffolds were studied. The bioscaffolds were characterized by scanning electron microscopy, Fourier Transform infrared spectroscopy, and differential scanning calorimetry. In addition, other properties including porosity, swelling degree, water vapor transmission rate, entrapment efficiency, and the release of gentamicin sulfate were investigated. Results showed that high concentrations of NaCl (10 g/L) in the aqueous phase led to an increase of around 68% in the initial burst release due to the increase in porosity. In fact, porosity increased from 68.1 ± 1.2 to 94.1 ± 1.5. Moreover, the thermal treatment of the Polylactide-polyvinyl alcohol/NaCl (PLA-PVA/NaCl) bioscaffolds above glass transition temperature (Tg) reduced the initial burst release by approximately 11% and prolonged the release of the drug. These results suggest that thermal treatment of polymer above Tg can be an efficient approach for a sustained release.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%