Thermoresponsive behaviors of novel polyoxyethylene-functionalized acrylamide copolymers: Water solubility, rheological properties and surface activity

He, Yang; Gou, Shaohua; Zhou, Yanting; Zhou, Lihua; Lan, Tian-Syung; Liu, Ling; Fang, Shenwen

doi:10.1016/j.molliq.2020.114337

Cited by 9 publications

(2 citation statements)

References 58 publications

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“…The high energy associated with carbon–carbon bonding and its exceptional thermal stability contribute to effective viscosity enhancement [ 28 ]. Further enhancements in overall temperature and shear resistance can be achieved by introducing monomers with benzene rings, polycyclic rings, or substantial side groups [ 29 , 30 , 31 ]. These modifications induce spatial steric effects within the polymer, thereby boosting its temperature resistance.…”

Section: Introductionmentioning

confidence: 99%

Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

Ma,

Zhao,

Yang

et al. 2023

Gels

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To expand the applicability of gel fracturing fluids in ultra-high-temperature reservoirs, a temperature-resistant polymer was synthesized using the solution polymerization method. Subsequently, an ultra-high-temperature-resistant polymer gel was formulated by incorporating an organic zirconium crosslinking agent. A comprehensive investigation was carried out to systematically study and evaluate the steady shear property, dynamic viscoelasticity, and temperature and shear resistance performance, as well as the core damage characteristics of the polymer gel. The obtained results demonstrate that the viscosity remained at 147 mPa·s at a temperature of 200 °C with a shear rate of 170 s−1. Compared with the significant 30.9% average core damage rate observed in the guanidine gum fracturing fluid, the core damage attributed to the polymer gel was substantially mitigated, measuring only 16.6%. Finally, the gelation mechanism of the polymer gel was scrutinized in conjunction with microscopic morphology analysis. We expect that this study will not only contribute to the effective development of deep and ultradeep oil and gas reservoirs but also furnish a theoretical foundation for practical field applications.

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Section: Introductionmentioning

confidence: 99%

Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

Ma,

Zhao,

Yang

et al. 2023

Gels

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“…The switchable molecules can have different physical and chemical properties controlled by a well-defined stimulus to offer the intelligent feature for solutions. Such a process is typically triggered by temperature, , pH, , light irradiation, − CO 2 /N 2 injection, , magnetic field, − etc., so they are also known as the responsive molecules named after the triggers. For example, the poly(N-isopropylacrylamide)-modified nylon membrane and the wax-based Janus particles can circularly separate various stable emulsions through the wettability adjustment of the designated temperature. , The multi-responsive molecules with some specific units, such as spiropyran, N-isopropylacrylamide, and acrylic acid, could at the same time exhibit a desirable adjustability of surface properties. , Lowering the pH or exchanging imine deprived the amphiphilic properties of materials, allowing the wetting manipulation of the interfaces for drug release and emulsion separation. − The magnetic iron oxide nanoparticles grafted with hydrophobic and hydrophilic monomers also showed excellent responsive performance in Pickering emulsification and various phase separations. − The analogous strategies have been extensively reported and applied in various emulsions, broadening the scope of applications.…”

Section: Introductionmentioning

confidence: 99%

Novel Strategy of Polymers in Combination with Silica Particles for Reversible Control of Oil–Water Interface

Sun

et al. 2022

ACS Appl. Mater. Interfaces

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Hybrid smart emulsification systems are highly applicable in manipulating oil-in-water (O/W) droplets. Herein, novel switchable block polymers containing both zwitterionic and tertiary amine pendent groups were designed and synthesized to combine with charged silica particles to stabilize the O/W emulsion responsive to pH. This study was carried out in O/W emulsions stabilized with the polymer and silica particles under different pH conditions. The emulsion system was also simulated using molecular dynamics simulation to reveal the mechanism at molecular levels, thus gaining insight into the relationships between the emulsifying properties and the molecular interaction of the mixed system. Upon acidification of the continuous aqueous phase, protonated polymers with excellent hydrophilicity were induced by charged silica particles to cause rapid emulsion coalescence. In alkaline media, the mixed system conversely stabilized the O/ W emulsions, cutting polymer consumption by over three-quarters. The emulsification and demulsification can be switched alternately by tuning the pH conditions. The applications exhibited excellent efficiency in separating heavy oil/water emulsions and proved the high conversion rate in emulsion polymerization. Overall, with this novel strategy to relieve tedious modifications on particle surfaces and massive consumption of polymers, the designed responsive emulsification systems can impart intelligent and controllable chemical reactivity to emulsions on demand in a more affordable and sustainable way.

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Study of Thermodynamic and Rheological Properties of Sensitive Polymeric Nanoparticles as a Possible Application in the Oil Industry

Ruiz-Virgen,

Hernández-Martínez,

Martínez-Mejía

et al. 2024

J Solution Chem

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Thermoresponsive behaviors of novel polyoxyethylene-functionalized acrylamide copolymers: Water solubility, rheological properties and surface activity

Cited by 9 publications

References 58 publications

Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

Novel Strategy of Polymers in Combination with Silica Particles for Reversible Control of Oil–Water Interface

Study of Thermodynamic and Rheological Properties of Sensitive Polymeric Nanoparticles as a Possible Application in the Oil Industry

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