production of a discontinuous nonionic polyacrylamide gel

production of a discontinuous nonionic polyacrylamide gel
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  • What is nonionic polyacrylamide (NPAM) gel?
  • Nonionic polyacrylamide (NPAM) gel was prepared for in-depth profile control. A compact three dimensional network structure was formed in the bulk gel system. Retention, adsorption and bridging across the pore throats occur in high permeability zones. The NPAM gel shows superior high temperature resistant. °C.
  • Can nonionic polyacrylamide be used as a gel fracturing fluid?
  • Nonionic polyacrylamide (NPAM) with controlled molecular weight was successfully synthesized as a gel fracturing fluid by aqueous solution polymerization.
  • Why do cross-linked PNIPAm gels undergo a discontinuous phase transition?
  • Cross-linked PNIPAM gels, though nonionic, undergo a discontinuous volume phase transition from a low-temperature swollen state to a high-temperature collapsed state in water approximately 32 °C as the temperature is varied . The molecular origin of this phenomenon remains to be fully understood.
  • Can phenolic resin cross-linked NPAM gel be used for water production control?
  • Conclusions In this work, a phenolic resin cross-linked NPAM gel was selected as an in-depth profile control agent for water production control. The gelation time and gel strength of the NPAM gel can be controlled by adjusting the NAPM polymer or cross-linker concentration.