Regularities of obtaining and propertіеs of the hydroxyapatite filled porous composites based on polyvinylpyrrolidone
DOI:
https://doi.org/10.15587/1729-4061.2014.27701Keywords:
porous hydrogels, polyvinylpyrrolidone, silver nanoparticles, hydroxyapatite, bactericidal and fungicidal propertiesAbstract
New hydroxyapatite-filled porous composites based on methacrylic esters and polyvinylpyrrolidone, which can be used in bone regeneration processes were synthesized. The influence of the polymer-monomer composition structure, nature and amount of filler, silver nitrate on the polymerization rate was studied. It was found that with the increase in the amount of polyvinylpyrrolidone in composition, the polymerization rate rises, and the induction period is practically absent. The polymerization rate of compositions of hydrophobic glycidyl methacrylate is significantly higher than in the case of 2-hydroxyethyl methacrylate. Compositions that contain hydroxyapatite in an amount of more than 70 wt. % have lower reactivity compared to the compositions without filler. Adding silver nitrate to the composition reduces the polymerization rate.
The influence of the foam stabilizer nature, hydroxyapatite amount on properties of composites was examined. The porous structure of the material is formed with the content of hydroxyapatite in the original composition of at least 25 wt.%. The highest porosity is observed when using glycerol in an amount of 50 wt. %.
Silver nanoparticles in the form of polyhedra with different sizes in the composite structure were obtained by restoring silver nitrate by tertiary nitrogen of polyvinylpyrrolidone. Formation of silver in this reaction is confirmed by UV spectroscopy and chemical analysis of the products of interaction between AgNO3 and polyvinylpyrrolidone. Synthesized silver-containing composites are characterized by bactericidal and fungicidal properties, in particular regarding the bacteria Escherichia coli, Staphylococcus aureus and Aspergillus niger.References
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Copyright (c) 2014 Наталія Богданівна Семенюк, Галина Дмитрівна Дудок, Тарас Володимирович Скорохода, Олег Володимирович Суберляк
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