Nano-particulate Structures with Glucose-Derived Char and Compacted Fumed Silica in Gaseous and Aqueous Media

Compacted fumed silica (densil, DS) was prepared using mechanochemical activation of wetted nanosilica A-300 (0.5 g of water per gram of dry silica) in a powder state. DS was used as a matrix to prepare composite with glucose (Gl/DS) (90 g glucose +25 g water per 50 g DS), which was then carbonized (500 °C, 3 h) to form nano-particulate char bound to DS. The particle size distribution of carbodensil (C/DS) in aqueous media is similar to that of DS (in 0.1–10 μm range) that is appropriate for practical applications of DS and C/DS as drug carriers or enterosorbents. The developed method of gas-phase mechano-sorption modification of nanooxides can be used for modification of disperse materials by nonvolatile compounds using a small amount of a solvent (∼30–40 wt.%).