Preparation and properties of new green polyacrylamide hydrogels

Abstract The pursuit of low-toxicity hydrogels represents a focal point and frontier in contemporary research endeavors. Partially hydrolyzed polyacrylamide emerges as the most prevalent polymer employed in the formulation of priority flow control gels, owing to its favorable cost-efficiency and heightened receptivity to crosslinking agents. A noteworthy discovery pertains to the utilization of a green crosslinking agent derived from TiSO 4 , which induces the gelation of polyacrylamide, resulting in an elevation of apparent viscosity from 1159 mPa·s to 100, 000 mPa·s. Extensive investigations into the primary factors influencing the performance of crosslinked polymer gels and their underlying principles have been conducted. The advent of such gel plugging agents holds promise in addressing challenges encountered in select reservoir scenarios, thereby furnishing reliable technical underpinnings for the efficacious stimulation of oil fields.