Preparation and properties of amphoteric polyacrylamide/modified montmorillonite nanocomposites and its drag reduction performance

Lü, Xing; Ke, Yanxiong; Xu, Huibin; Zhao, Yi; Peng, Fangfang; Bai, Cancan; Yuan, Li-Yan

doi:10.1016/j.colsurfa.2019.04.078

Cited by 14 publications

(2 citation statements)

References 57 publications

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“…Conventional polyacrylamides cannot meet polymer ooding requirements. Under high-temperature and high-saltconcentration conditions, line polyacrylamide chains are prone to shear degradation [6][7][8] and the solution performance is reduced, which cannot meet the water ooding in deep reservoirs [7][8][9][10] . Therefore, modi ed hydrophobically associating polyacrylamide has attracted the attention of many scholars.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrophobic monomers with different carbon chains on the structure–activity relationship of associating polyacrylamides

Yang,

Lai,

et al. 2024

Preprint

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As temperature and salt-resistant materials, hydrophobically associating polymers can form a reversible spatial network structure through the interaction between their hydrophobic groups, effectively improve the viscosity of the polymer solution through association, and enhance the temperature and salt resistance of the polymer. Hydrophobically associating monomers have different effects on the properties of polymer solutions. Herein, acrylic acid, acrylamide, and 2-acrylamido-2-methylpropanesulfonic acid were used as hydrophilic monomers. The three hydrophobic monomers with different carbon chain lengths were prepared by the bromination reaction. Hydrophobic associating polymers DQM1-PAM, DQM2-PAM, and DQM3-PAM were prepared by aqueous solution free-radical polymerization. The structure–activity relationship of the hydrophobic monomers with different carbon chain lengths on polymers was studied. It was confirmed by Fourier-transform infrared spectroscopy and 1H-NMR that the target product was successfully synthesized. Scanning electron microscopy revealed that with increasing hydrophobic carbon chain length, the hydrophobic microarea of molecular aggregation increased, forming a closer spatial network structure. Thermogravimetric and fluorescence tests revealed that with increasing hydrophobic carbon chain length of polymer molecules, the polymerization temperature resistance increased, intermolecular association degree increased, and critical association concentration decreased. Rheological property evaluation revealed that the viscosity of 0.5% polymer DQM1-PAM, DQM2-PAM, and DQM3-PAM was 71.32, 118.79, and 118.79 mPa·s after shearing at 120°C and 170 s− 1 for 1 h. With the increase in the carbon chain length, the retention rate of shear viscosity of polymer in a salt solution increased, showing good salt resistance. Concurrently, the molecular aggregation microarea of a solution with 0.5% polymer, degree of molecular chain action, viscoelasticity of the solution (G' > G''), and thixotropic area all increased. The performance of polymer solution can be improved by modifying hydrophobically associating polymers with long carbon chains, which has a broader application.

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Section: Introductionmentioning

confidence: 99%

Effect of hydrophobic monomers with different carbon chains on the structure–activity relationship of associating polyacrylamides

Yang,

Lai,

et al. 2024

Preprint

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“…To improve the drag-reduction effect, it is usually necessary to add surfactants at higher concentrations. The fracturing costs are increased, which limits the wide use of surfactant drag reducers in slickwater fracturing fluids. , For polymer drag reducers, as the linear polymer chain stretches in the turbulent flow, the extensional viscosity is increased. − The tensile viscosity reduces the turbulent energy in the buffer layer, thus reducing the formation of turbulent vortices and the motion resistance in the fluid, resulting in effective drag reduction. ,− Polymer drag reducers are mainly divided into dry powder drag reducers and emulsion drag reducers. Compared with dry powder drag reducers, emulsion drag reducers have the advantageous characteristics of faster dissolution rates and the ability to keep up with the continuous fracturing processes.…”

Section: Introductionmentioning

confidence: 99%

Development and Drag Reduction Behaviors of a Water-in-Water Emulsion Polymer Drag Reducer

Zhao

Liu

Dai

et al. 2023

ACS Appl. Polym. Mater.

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As a key component of slickwater fracturing fluids, drag reducers play a critical role. Water-in-water (W/W) emulsion polymer drag reducers with the characteristics of rapid dissolution and the ability to increase viscosity are attracting substantial attention. In this work, a W/W emulsion polymer drag reducer P(AM-DMC) was synthesized via dispersion polymerization. The material P(AM-DMC) was characterized using Fourier transform infrared spectrometry, hydrogen nuclear magnetic resonance spectrometry, and environmental scanning electron microscopy. The results showed that the aqueous P(AM-DMC) solution was a pseudoplastic fluid with appreciable viscosity enhancement and shear resistance. The dissolution time of 0.1 wt % P(AM-DMC) was only 29 s. The drag-reduction rate of P(AM-DMC) reached 71.75%. The drag reducer also exhibited good temperature and salt resistance. Finally, a dragreduction mechanism was proposed. We hope that this study can broaden the application of W/W drag reducers in shale reservoir development.

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Preparation of adaptive bifunctional reconfigurable polymers and their sand carrying and drag reduction behaviour

Zhou,

Wu,

Chen

et al. 2024

Can J Chem Eng

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In order to solve the problem of drag reduction at the front end of shale fractures and sand carrying at the tail end with increased viscosity, the molecular dynamics simulation (MD) method was used to design polymer molecules and simulate the steric resistance, interaction potential energy, mean square displacement, and radial distribution function of the polymer. The polymer AM‐AMPS‐LMA‐DiC12AM (ASLC12) with better solubility, diffusion, and resistance reduction potential was obtained and synthesized. By scanning electron microscope (SEM) and viscoelastic analysis, ASLC12 has a stable mesh structure, good viscoelasticity, and shear resistance, and the mesh structure formed by it is in a dynamic equilibrium state of fracture‐reorganization under shear. We then analyzed the drag reduction, sand carrying, and salt resistance of ASLC12. When the concentration of ASLC12 is 0.09%, the sand‐carrying requirement is satisfied. When the concentration is 0.05%, the drag reduction rate can reach 74.1%, and the resistance reduction rate of ASLC12 in salt ion solution can still reach more than 62%. This shows that the polymer ASLC12 has better sand carrying, drag reduction, and salt resistance.

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Preparation and properties of amphoteric polyacrylamide/modified montmorillonite nanocomposites and its drag reduction performance

Cited by 14 publications

References 57 publications

Effect of hydrophobic monomers with different carbon chains on the structure–activity relationship of associating polyacrylamides

Effect of hydrophobic monomers with different carbon chains on the structure–activity relationship of associating polyacrylamides

Development and Drag Reduction Behaviors of a Water-in-Water Emulsion Polymer Drag Reducer

Preparation of adaptive bifunctional reconfigurable polymers and their sand carrying and drag reduction behaviour

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