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Ibragimova, A. R.; Gabdrakhmanov, D. R.; Khamatgalimov, A. R.; Saifina, A. F.; Gubaidullin, A. T.; Egorova, S. R.; Lamberov, A. A.; Danilaev, M. P.; Zakharova, L. Ya
Russian chemical bulletin, 07/2019, Letnik: 68, Številka: 7Journal Article
MCM-41 type mesoporous silica particles were obtained using a template method in an alkaline medium and cetyltrimethylammonium bromide as a matrix. The structural and adsorption characteristics of the mesoporous material were studied by dynamic light scattering, scanning electron microscopy, low-temperature adsorption—desorption of nitrogen, IR spectroscopy, and simultaneous thermal analysis. It was shown that the obtained mesoporous material possesses high porosity with the specific pore volume in excess of 1 cm 3 g −1 . It was established that the size of silica particles does not exceed 200 nm, which is a value acceptable for the penetration of drugs through cell membranes. The optimal compositions of aqueous dispersions of MCM-41 with minimal sedimentation processes were determined. A drug (indomethacin) was encapsulated into the silica pores using the precipitation method at various temperatures (40 and 60 °C), the quantitative parameters of loading efficiency were calculated. The infl uence of temperature on the encapsulation ability was demonstrated.
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