Modified acrylamide copolymers based on β-cyclodextrin and twin-tail structures for enhanced oil recovery through host–guest interactions

Peng, Chuan; Gou, Shaohua; Wu, Qi; Zhou, Lihua; Zhang, Huichao; Fei, Yumei

doi:10.1039/c8nj06432f

Cited by 24 publications

(10 citation statements)

References 45 publications

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“…Compared with other non-covalent interactions, the host–guest interaction has a high degree of molecular structure matching, which requires the size and shape of the host cavity structure and the mutual matching between the host and the guest, and it becomes a supramolecular interaction with high recognition ability. The cyclodextrin-based supramolecular system is widely used in EOR [ 30 , 34 , 37 , 95 , 96 , 97 ]. When the host–guest interaction is used to construct the supramolecular polymer system, the enhanced polymer network structure makes the hydrodynamic volume of the solution increase dramatically.…”

Section: How To Fabricate Supramolecular Polymers?mentioning

confidence: 99%

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

et al. 2022

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High molecular polymers have been widely studied and applied in the field of enhanced oil recovery (EOR). At present, the focus of research has been changed to the design of polymer networks with unique properties such as anti-temperature and anti-salinity, good injection and so on. Supramolecular polymers have high viscoelasticity as well as excellent temperature, salt resistance and injection properties. Can supramolecular polymers become another material choice for polymer flooding to enhance oil recovery? The present review aims to systematically introduce supramolecular polymers, including its design strategy, interactions and rheological properties, and address three main concerns: (1) Why choose supramolecular polymers? (2) How do we synthesize and characterize supramolecular polymers in the field of oilfield chemistry? (3) What has been the application progress of supramolecular polymers in improving oil recovery? The introduction of a supramolecular interaction system provides a new idea for polymer flooding and opens up a new research direction to improve oil recovery. Aiming at the “reversible dynamic” supramolecular polymers, the supramolecular polymers are compared with the conventional covalent macromolecular polymer networks, and the challenges and future research directions of supramolecular polymers in EOR are discussed. Finally, the author’s viewpoints and perspectives in this emerging field are discussed.

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Section: How To Fabricate Supramolecular Polymers?mentioning

confidence: 99%

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

et al. 2022

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“…The most important method for the synthesis of modified HPMC is grafting, including “graft from”, “graft through”, and “graft onto” . As a very common and simple route to obtain graft copolymers, the “graft from” method can control the length of molecular chains well with some special initiator systems, such as the ceric ammonium nitrate (CAN)/nitric acid system and potassium persulfate (KPS), etc., ,− while the “graft through” method produced low-molecular-weight polymers due to the high barrier of branched groups and the “graft onto” method has a low grafting rate (less than 7 mol %). , Meanwhile, some previous research studies also indicated that copolymers containing a non-ionic rigid cyclic main chain structure usually present a higher salt tolerance, temperature resistance, stability on various solid supports, and anti-shearing performance than PAM. − Pu et al synthesized the polymer PAMCS by grafting acrylamide, acrylic acid, and 2-acrylamido-dodecyl sulfonate onto chitosan via one-step water free-radical polymerization. The robust steric effect of the rigid six member heterocyclic ring and hydrogen bonding synergistically made the PAMCS copolymer with high salt resistance and temperature tolerance under harsh reservoir conditions .…”

Section: Introductionmentioning

confidence: 99%

A Hydroxypropyl Methyl Cellulose-Based Graft Copolymer with Excellent Thermothickening and Anti-salt Ability for Enhanced Oil Recovery

et al. 2022

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Thermothickening polymers are a novel type of material developed for enhanced oil recovery applications in high-temperature and high-salinity oil reservoirs. However, the existing synthesis process of thermoviscosifying polymers is complex and of high cost, both of which limit the wide application of thermoviscosifying polymers. In this study, a thermothickening water-soluble polymer (PHAD) with a low concentration was synthesized by a “graft from” method, with acrylamide and diacetone acrylamide as grafted monomers and hydroxypropyl methyl cellulose as the backbone chain. The basic parameters for PHAD copolymers were systematically studied in comparison with their homopolyacrylamide counterpart. The results show that the PHAD copolymers exhibited excellent thermothickening ability even when the polymer concentration was 0.2 wt % (total salinity is 9350.08 mg·L–1) upon increasing the temperature from 25 to 90 °C, where the apparent viscosity enhancement changes from 4.0 to 13.3 times with increasing the diacetone acrylamide content in PHAD copolymers. The PHAD copolymers also showed good salt tolerance, thermal stability, and viscoelastic properties under harsh reservoir conditions, which are attributed to the synergistic effect of the rigid heterocyclic ring structure and hydrophobic intermolecular association of thermoresponsive monomers within polymer chains. Moreover, the core displacement experiment and etched glass microscopic model show that the PHAD copolymers have good migration in porous media. Due to its high sweep efficiency, the PHAD copolymer has a higher recovery factor (14.0%) than polyacrylamide (4.3%), which makes it more suitable for salt-tolerant and temperature-tolerant tertiary oil recovery chemicals.

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“…For instance, Du et al [ 29 ] prepared hydrophobically associative polyacrylamide based on p-sulfocalix[4]arene that special structure endows the copolymers with thickening ability, salt tolerance, temperature resistance, and long-term stability. Moreover, Peng et al [ 30 ] synthesized hydrophobically associative polyacrylamide functionalized with β-cyclodextrin. The experiment results illustrated that the copolymers could increase the solution viscosity compared with unfunctionalized polyacrylamides.…”

Section: Introductionmentioning

confidence: 99%

Design of novel temperature-resistant and salt-tolerant acrylamide-based copolymers by aqueous dispersion polymerization

Li¹,

Ju²,

Jia³

et al. 2022

Designed Monomers and Polymers

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Development of polymer-based flooding technology to improve oil recovery efficiency, water dispersion copolymerization of acrylamide, cationic monomer methacryloxyethyltrimethyl ammonium chloride (METAC), and anionic monomer acrylic acid (AA) were carried out in aqueous ammonium sulfate solution with polyvinyl pyrrolidone (PVP) as the stabilizer. The copolymers were characterized by 1 H-NMR, FT-IR, TG, and SEM to confirm that they were prepared successfully and exhibited excellent salt-resistant property. Moreover, the effect of the aqueous solution of ammonium sulfate (AS) concentration, stabilizer concentration, and initiator concentration on the viscosity and size were systematically investigated. To further improve the thermal endurance properties of copolymer, hydrophobic monomers with different alkyl chain lengths were added to the above system. The acrylamide-based quadripolymer possessed prominent thermal and salt endurance properties by utilizing the advantages of zwitterionic structure and hydrophobic monomer. With the temperature rising, the viscosity retention could reach 70.2% in the water and 63.8% in the saline. This work had expected to provide a new strategy to design polymers with excellent salinity tolerance and thermal-resistance performances.

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Modified acrylamide copolymers based on β-cyclodextrin and twin-tail structures for enhanced oil recovery through host–guest interactions

Abstract: Two kinds of copolymers with host–guest interaction were synthesized, showing great potential for enhanced oil recovery.

Cited by 24 publications

References 45 publications

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

A Hydroxypropyl Methyl Cellulose-Based Graft Copolymer with Excellent Thermothickening and Anti-salt Ability for Enhanced Oil Recovery

Design of novel temperature-resistant and salt-tolerant acrylamide-based copolymers by aqueous dispersion polymerization

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