СЕКЦИЯ 6. «ЗОЛЬ-ГЕЛЬ МАТЕРИАЛЫ ДЛЯ ПРИМЕНЕНИЙ В ОБЛАСТИ
ОХРАНЫ ПРИРОДЫ, СЕЛЬСКОГО ХОЗЯЙСТВА И БИОМЕДИЦИНЫ»
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high assimilation capacity, and superior efficiency in processing and recovering swallowed oil. How-
ever, in practice, in most cases, synthetic materials were used, such as foamed polyurethane, poly (tet-
rahydrofuran) and polydimethylsiloxane porous foams. But the disadvantages of these synthetic
sorbents are the high costs of their production and the large volume of waste [3].
To date, on the basis of the Tashkent Scientific Research Institute of Chemical Technology,
oleogels have been synthesized with oleophilic hydrophobic properties, based on isoprene rubbers. In
the course of scientific and laboratory studies, it was found that the oleogel based on isoprene rubber
shows a high hydrophobic property [4].
In this study, isoprene rubber was modified with maleic anhydride. Maleic anhydride was
added to the isoprene rubber in order to improve the adsorption capacity of the oliogel mass as the
polymer impurity increases its strength. In addition, with such a composition, a relatively elastic oleo-
gel is formed, a decrease in the hardness of rubber, rather than sulfur, occurs. Another feature is that
the hydrophobic properties are improved and the degree of swelling is increased without becoming
rubber after some shrinkage. In this study, the physicochemical properties of oleogel compositions that
absorb oils and lubricants obtained from various brands of rubbers were studied. The elasticity of the
isoprene rubber and the high surface-active stability of maleic anhydride resulted in good oil absorp-
tion by the composition.
To carry out the synthesis of oleogel, rubbers were first brought into a dissolved state, and
then heated and mixed with a crosslinking agent and an initiator in a magnetic stirrer, and at the next
stage, the deposition process was carried out in a state of slow mixing. Maleic anhydride was added as
a binder. The experiment lasts three hours. After the completion of the process, it is cooled to room
temperature. At the final stage of the experiment, the oleogel was dried from organic solvents and
granulated to a powder state. The oleogel swelling test results showed that they absorb oil from water
[5].
Fig.1.
Thermogravimetric derivatogram and differential thermogravimetric analysis of iso-
prene rubber
The experiment lasts four to five hours. At the end of the process, the oleogel is cooled to
room temperature. Drying oleogels are used in organic solvents in the form of granular powders. Test
results for oleogels have shown that they absorb oil from water.
Analysis results. Oleogels were investigated using IR spectra, SEM and thermal analysis. The
following images have been tested on oleogellar (TGA), (DTA) devices.
For thermogravimetric analysis of isobutyl rubber, 6.26 mg of the substance was extracted
from this substance and the process was investigated at a temperature of 500 ° C. The thermogravimet-
ric derivatogram of isobutyl rubber is shown in Figure 1 below.
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