Journal of Siberian Federal University. Chemistry / Synthesis and Study of Viscoelastic Properties of Aminosilane and Glyoxal Crosslinked Polyacrylamide Gels

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2025 18 (2)
Authors
Pryazhnikov, Maxim I.; Hedi Ben Ahmed; Volchenko, Elizaveta N.; Minakov, Andrey V.
Contact information
Pryazhnikov, Maxim I. : Siberian Federal University Krasnoyarsk, Russian Federation; ; Hedi Ben Ahmed: Siberian Federal University Krasnoyarsk, Russian Federation; Volchenko, Elizaveta N. : Siberian Federal University Krasnoyarsk, Russian Federation; Minakov, Andrey V. : Siberian Federal University Krasnoyarsk, Russian Federation
Keywords
polyacrylamide; cross-linked gels; hexamine; glyoxal; aminosilane; rheology; viscoelasticity; concentration; temperature holding
Abstract

The relevance of the study is due to the need for a detailed study and optimization of the viscoelastic properties of cross-linked gels to improve the efficiency of hydraulic fracturing technologies. Of particular importance is the establishment of the relationship between the structure of cross-linked gels and rheological characteristics, in particular, viscoelastic moduli. Original thermal cross-linking gel systems based on partially hydrolyzed polyacrylamide with a mass concentration of 0.7wt.% were synthesized. Aminosilane and glyoxal were used as crosslinkers, their mass concentration varied from 0.2 to 1 %. Thermal stability tests were carried out, with the gels kept for 12 hours at a temperature of 80 °C. A study of the viscosity and viscoelastic properties of the synthesized gels before and after holding was conducted. It is shown that it is possible to control the rheological parameters of the synthesized gels by varying the concentration of crosslinkers and temperature. The use of thermally crosslinkable polymers, in which the viscoelastic characteristics increase during the crosslinking process, can serve as one of the ways to solve the problem of thermal destruction of polymers

Pages
294–304
EDN
HKMVXK
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/156216