Composite systems based on crushed Calendula officinalis flowers and nanosilica A-300
DOI:
https://doi.org/10.15407/dopovidi2017.04.076Keywords:
Calendula officinalis flowers powder, nanosilicaAbstract
The formation of composite systems based on nanosilica A-300 (original and wetting-drying compaction nanosilica) and crushed Calendula officinalis flowers is investigated by 1H NMR spectroscopy. It is shown that there is a tendency to an increase in the total water binding, which indicates the formation of a composite system containing a mineral and plant components. It is revealed that the silica nanoparticles affect the binding of water in the dispersed plant component. This leads to a significant decrease of water clusters with a radius R > 10 nm, by increasing the number of clusters with R = 2 nm. The creation of the composite system, by adding 10 % hydrochloric acid, is revealed in the formation of water clusters weakly dissolving the acid. The concentration of clusters is strongly dependent on the method of preparation of the composite material. Optimal conditions for the composite formation are implemented with the use of wetting-drying compaction nanosilica.
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