Delayed Crosslinking Amphiphilic Polymer Gel System with Adjustable Gelation Time Based on Competitive Inclusion Method

Abstract

Delayed crosslinking polymer gel systems are widely utilized in deep profile control processes for water production control in oilfields. In this paper, a kind of delayed crosslinking amphiphilic polymer gel system with adjustable gelation time based on competitive inclusion was prepared and its delayed crosslinking gelling properties were studied. The amphiphilic polymer of P(acrylamide (AM)–sodium acrylate (NaA)–N-dodecylacrylamide (DDAM)) was synthesized and it showed much better salt resistance, temperature resistance, and shear resistance performance compared with hydrolyzed polyacrylamide (HPAM). Phenol can be controlled released from the the cavity of β-cyclodextrin (β-CD) ring in the presence of the hydrophobic group used as the competitive inclusion agent in the amphiphilic polymer backbone. Accordingly, the gelation time of the delayed crosslinking amphiphilic polymer gel system is closely related to release rate of the crosslinker from the the cavity of β-CD ring. This study screened an amphiphilic polymer with good salt resistance and temperature resistance performance, which can be used in high temperature and high salinity reservoirs, and provided a feasible way to control the gelation time of the polymer gel system by the competitive inclusion method.

Removal of Amphiphilic Polymer from Tertiary Oil Recovery Wastewater Using Insoluble Cyclodextrin Polymer

“…In this paper, the synthesis of guest amphiphilic polymer (GAP) mainly uses KPS-SHS system (the molar ratio was 1:1) as the initiator of the reaction, and sodium dodecyl sulfate as the surfactant of solubilizing hydrophobic monomer by free radical micelle polymerization as described in literature [16] . The reaction equation is shown in Fig.…”

“…As to the treatment processes for the chemical flooding wastewater, several methods were employed include coagulation/flocculation, oxidation, biodegradation, membrane filtration or combined method [11][12][13][14][15] . Amphiphilic polymers (AP) have good viscosity and solubilization properties, which can greatly improve oil recovery [16] . However, the wastewater produced by AP flooding is seriously emulsified and difficult to treat.…”

Macroporous open cell polyester amphigel using citric acid and PEO: Solvent absorption, thermal behavior, and slow release of pesticide

“…Similarly, amphigels produced by the introduction of hydrophobicity in the poly(acrylate) chain had also shown differential swelling or deswelling capacity due to changes in pH of the external medium. 1,6 Evidently, several methods and a variety of monomers are reported to produce amphigels, 7,8 however, till now there are few reports on one pot synthesis of amphigels involving the use of nontoxic monomers. 9 The present study reports the use of nontoxic poly(ethylene oxide) (PEO) and citric acid (CA) to synthesize amphigels with macroporous foam structure.…”

Hydrophilic Polymers

“…As such CDs can be utilized for the gelation but they can be utilized for various other purposes in hydrogels as well, e.g., stimulus response or cargo loading. [23] Bian and coworkers utilized the kinetics of β-CD inclusion complex formation to obtain delayed crosslinking hydrogels [24]. Therefore, an amphiphilic polymer was synthesized from hydrophilic acrylamide, sodium acrylate and hydrophobic N -dodecylacrylamide.…”