The perspective direction in the creation of microfertilizers is using
composite system which based on nanosilica and substance-sensitizer.
Substance-sensitizers are conductors of nutritional minerals, providing high
growth and increasing their resistance to different diseases. Tannin may be one
from these substances
So, the aim of this work was studying of bonding initial tannin and tanninhydrophobic
methylsilica composite system with water.
1Н NMR spectra of initial tannin, containing 50 mg/g residual water in the
air medium, shows only signal of adsorbed water (chemical shift δH=4.5-6 ppm).
This means that the present type of bound water is strongly associated water
(SAW, every molecule participates in the formation of two or more hydrogen
bonds). The spectra become more complicated for water adsorbed in the
composite system which prepared by mechanochemical activation of equal
weight parts of tannin and methylsilica. There are clusters of strongly and
weakly associated water (WAW) on the surface of composite system. The part
of WAW increases with temperature decreasing.
Thus, 1H NMR spectroscopic studies allows us to assume, that the
stimulating effect can be observed due to the formation of a significant amount
of weakly associated water in the germination zone, which will improve the
mass exchange of germinating seeds with the surrounding medium.