NANOSTRUCTURED CARBON FIBER MODIFIED BY SILVER NANOPARTICLES FOR THE MEDICAL APPLICATION

Abstract

In this work, the feasibility of synthesizing new materials for the medical application using activated carbon fibers with silver nanoparticles through immobilization by adsorption from solutions (ACFNM/AgNP) has been studied. The stability of the formed composite system in physiological solutions as a modern medical application form has been examined. Optimal modes of carbonized tissue activation are proposed for synthesis of nanostructured carbon fiber with high sorption capacity. The size distribution of silver NPs after the ultrasonic treatment of the original silver solution in glycerol was proved to significantly decrease in the size of the agglomerates formed in the solution. It has been shown that after ultrasound treatment of nanoparticles, silver is actively adsorbed by the porous structure of the carbon matrix. Treatment of carbon fiber with silver nanoparticles showed their uniform adsorption on the surface of the carbon matrix to form silver agglomerates with sizes of ~90–120 and 250–300 nm. When studying the physicochemical stability of the obtained composite systems in biological solutions it was revealed that the intensity of silver release from the surface of the ACFNM/AgNP composite system depends on the volumetric capacity of the carbon matrix, the initial concentration of silver in the solution, and the chemical composition of biological media. At that, the amount of silver in the water filtrate was established to be greater than in physiological solutions after the interaction. It was shown that the initial silver concentration of 25 mg/L in a suspension of glycerol is most optimal for creating stable obtained composite ACFNM/AgNP systems. The ACFNM/AgNP composite system with a carbon matrix capacity of 1.0 cm³/g and an initial concentration of silver in a solution of 25 mg/L was recommended for the future development of modern application materials.