Viscoelastic Behavior of the Polyacrylamide Nanocomposite Hydrogels for Water Shut-off Applications

Partially hydrolyzed polyacrylamide (HPAM) is a well-known water-soluble and commercially available polymer whose gels are employed in many commercial applications, especially in treatment of oil wells for control of the excess water production. In this research, nanocomposite(NC) hydrogels were prepared by incorporating of laponite nanoparticles in the structure of hydrolyzed polyacrylamide followed by crosslinking of their aqueous solutions with ionic crosslinker. Viscoelastic behavior of the NC hydrogels were studied by probing the network properties. According to dynamic rheometry of the gelation process, the limiting storage modulus of the NC gels increased with increasing laponite content. The addition of laponite into the polyacrylamide gelling system increased their viscous properties more strongly than the elastic properties. Increasing rheometer frequency during gelation retarded the sol-gel transition and decreased the ultimate elastic modulus

کلیدواژه ها:

Nanocomposite ، Hydrogel ، Gelation ، Viscoelastic Properties ، Reservoir Unwanted Water