Chemical modification and synthesizing conditions of nanocomposite hydrogels with high mechanical strength crosslinked by hydrophilic reactive microgels

Qin, Xuping; Fang, Zhao; Feng, Shengyu

doi:10.1002/app.34389

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…In 2003, the concept of double network hydrogel was first proposed by Professor Gong Jianping of Hokkaido University [15]. Due to the insufficient mechanical properties of traditional hydrogels characterized by single network structures, the introduction of a second layer in double network hydrogels has addressed this deficiency, imparting them with unique elasticity and stability [16]. Improved mechanical properties of traditional hydrogels, including strength, are significantly enhanced in the double network hydrogel, while maintaining features like biocompatibility, water absorption, and transparency [17].…”

Section: Introductionmentioning

confidence: 99%

An Innovative High-Strength Double-Network Hydrogel for Use as a Drilling Fluid Plugging Agent

He,

Guo,

Bai

et al. 2024

Gels

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The problem of wellbore leakage is a key challenge in the petroleum industry, limiting drilling progress and increasing drilling costs. Plugging agents play a role in repairing leaks and fractures; however, traditional plugging materials generally have low mechanical strength, poor adaptability to permeable strata, limited water absorption and expansion capabilities, and poor temperature and salt resistance. To address these limitations, a pioneering polyacrylic acid-polyacrylamide (PAA/PAM) double-network hydrogel was synthesized through aqueous solution polymerization in this study. Its strength, water absorption, expansion, temperature resistance, salt resistance, and plugging effectiveness were comprehensively evaluated. The results demonstrate that good mechanical performance is exhibited by the synthesized hydrogel, capable of withstanding a maximum stress of approximately 3.5 MPa at a 90% strain. Excellent water absorption and expansion are observed in the synthesized double-network hydrogel, with a maximum expansion of 6 times within 30 min and 8 times after 2 h. Test results show that the hydrogel had good temperature resistance and salt resistance, maintaining a strength grade E within the experimental range. The simulated evaluation of the plugging experiment indicates that, under conditions of 130 °C and 6 MPa, the leakage rate of the drilling fluid is maintained below 5 mL/min when the double-network hydrogel is utilized. From the above experimental results, it can be illustrated that excellent mechanical properties, impressive water absorption, and expansion capabilities are exhibited by the synthesized double-network hydrogel. Furthermore, the high-temperature resistance and salt resistance of the double-network hydrogel were also demonstrated. Therefore, In comparison to traditional plugging materials, significant promise is held by this newly synthesized double-network hydrogel material as a plugging agent in drilling fluids.

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Section: Introductionmentioning

confidence: 99%

An Innovative High-Strength Double-Network Hydrogel for Use as a Drilling Fluid Plugging Agent

He,

Guo,

Bai

et al. 2024

Gels

View full text Add to dashboard Cite

show abstract

“…Therefore, there is a need for slow swelling rate and good deformability that can overcome blocking near bore and migrate into the deep reservoirs. To improve the mechanical strength of traditional hydrogels, researchers have made efforts to develop chemically modified materials with novel structures, such as topological gels [14], nanocomposite gel [15][16][17][18], double network gel [19], polymer microsphere composite hydrogel [20,21], hydrophobic association hydrogel [22,23], and tetrapolyethylene glycol hydrogel [24].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

Jin

et al. 2018

International Journal of Polymer Science

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Microspheres have excellent sealing performances such as injectivity, bridging-off, deep migration, and deformation performances, but their plugging effects are limited by the fast swelling rate and poor viscoelasticity. In this study, we synthesized a novel modified microsphere with polymerizable surfactant monomers and cationic monomers. We investigated the influence factors on the swelling performance and rheological properties of the microspheres and explored the ways to improve the plugging performance of hydrophobic-associating microspheres. The association behaviors in aqueous media of poly(acrylamide-comethacry loyloxyethyl trimethyl ammonium chloride-co-n-dodecyl poly(etheroxy acrylate) P(AM-DMC-DEA) are proven to be mediated by the DEA content. Moreover, the hydrophobic association interaction has a strong effect on the performance of microspheres such as swelling properties, the rheological performance, and plugging properties. The swelling properties of microsphere studies exhibited the slow swelling rate. The rheological performance measurements showed significant improvements; yield stress, and creep compliance increased rapidly from 404 to 2060 Pa and 3.89 × 10 −4 to 1.41 × 10 −2 1/Pa, respectively, with DEA content in microspheres rising from 0.0% to 0.22%. The plugging properties of microspheres were enhanced by the slow swelling performance and good viscoelasticity.

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Effects of microgel content and n‐methylolacrylamide on the properties of microgel composite hydrogels prepared by postcrosslinking method

2011

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Acrylamide co 2‐acrylamido‐2‐methylpropane sulfonic acid microgel composite (MC) hydrogels were prepared by heating MC polymer with 50% water content. Crosslinking reaction occurred in the heating process and reactive microgels with hydroxymethyl groups introduced by N‐methylolacrylamide (NMA) were used as postcrosslinkers. Microgel swollen size is influenced by NMA content. Both microgel and its NMA content affect MC hydrogel properties, which relates to the crosslinking chain length and the crosslinking density. The tensile strength of MC hydrogels increases and their elongation decreases as the microgel content increases from 0.1 to 0.5 g. Both the tensile strength and the elongation decrease as the microgel content further increases from 0.5 to 1.1 g. The MC hydrogel tensile strength increases and the elongation decreases as the NMA content of microgels increases from 5.0 to 14.8%. However, they both decrease when the NMA content of microgels exceeds 14.8%. Although the crosslinking chains υ calculated from tensile stress–strain curves were very high, MC hydrogels were elastic and had the highest tensile strength of 127 kPa and considerably moderate elongation of 427%. Their excellent mechanical properties attributed to their unique structure crosslinked by microgel particles. POLYM. COMPOS., 2012. © 2011 Society of Plastics Engineers

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Chemical modification and synthesizing conditions of nanocomposite hydrogels with high mechanical strength crosslinked by hydrophilic reactive microgels

Cited by 3 publications

References 31 publications

An Innovative High-Strength Double-Network Hydrogel for Use as a Drilling Fluid Plugging Agent

An Innovative High-Strength Double-Network Hydrogel for Use as a Drilling Fluid Plugging Agent

Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

Effects of microgel content and n‐methylolacrylamide on the properties of microgel composite hydrogels prepared by postcrosslinking method

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