The rheological properties of ternary cryogels

Viscosity measurements of individual fluids and their emulsion were carried out on a spindle viscosimeter Reotest-2 with a wide range of shear. It was discovered that the dispergation of even a small amount of the polymeric petroleum resin (PPR) in the polymer solution resulted in the noticeable increase of the dynamic viscosity of obtained emulsions compared to the viscosity of oil-in-water emulsion (consisting of the aquatic solution and dielectrical oil). Deformation (y) was defined in samples of the composite cryogels that were formed, then elastic stress (P) emerging in the material was measured. Then, based on Hooke 's formula Р = G*g, the modulus of elasticity appropriate to a given sample (G) was rated. It was shown that the addition of dielectrical oil (DO) to the polymeric matrix of the cryogel contributed to the modulus of elasticity increase. Increase in cryogels' elastic properties was observed with the increase in polymer concentration in samples and with the increase in oil content. Waterproof properties of cryogels (those filled with hydrophobic material) were evaluated by a gravimetric method over a period of 20 days for the value (%) of the size of cryogel swelling on contact with water. The degree of hydrophobicity of the surface of filled cryogel was determined by a video scanning method. It was noted that the cryogels filled with polymeric petroleum resin did not swell during storage in water and retained hydrophobic properties. The results are evidence ofa possibility in the principle of the formation of cryogels filled with mineral oil or polymeric petroleum resin. The presence of hydrophobic filling material (which is held quite tightly in the polymeric matrix) contributed to the formation of the elastic cryogels that demonstrate hydrophobic properties. This waterproofproperty means that the obtained materials will find practical use in technologies of unintended water filtration blocking through fractured zones or flushed zones ofhy-draulic architecture.

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