Unraveling bio-inspired pre-swollen effects of tetra-polyethylene glycol double network hydrogels with ultra-stretchable yielding strain

Wang, Xiaodong; Lu, Haibao; Wu, Nan; Hui, David; Fu, Yong Qing

doi:10.1088/1361-665x/aaf5b6

Cited by 3 publications

(1 citation statement)

References 43 publications

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“…By changing the cross-linking mode of hydrogel, the cross-linking degree can be controlled, and the equilibrium swelling rate of hydrogel can be affected [3]. Although hydrogels can absorb large amounts of water in solutions of different pH, they can still maintain a certain form without dissolving [4]. As a kind of polymer soft material widely used and simple to prepare, the hydrogel can maintain its shape and size under the action of external force.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Supramolecular Gel Properties and Its Application in Drilling Fluid Plugging

Du,

Feng,

et al. 2023

Processes

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Supramolecular gels are physically cross-linked hydrogels formed by non-covalent interactions. The synthesis, structure optimization, property regulation, and application expansion of supramolecular gels has gradually become the research hotspot in the field of gel materials. According to the non-covalent interactions such as hydrophobic association and hydrogen bonding, the supramolecular gel prepared in this study has excellent rheological properties and adaptive filling and plugging properties, and can be used in the field of drilling fluid plugging. In this paper, the microstructure, rheological properties, temperature resistance, and plugging properties of supramolecular gels were studied and characterized in detail. The experimental findings demonstrated that when the strain was less than 10%, the supramolecular gel displayed an excellent linear viscoelastic region. The increase in strain weakens the rheological properties of supramolecular gel and reduces the elastic modulus of supramolecular gel to a certain extent. The supramolecular gel still had a neat three-dimensional reticular structure after curing at high temperatures, and the network of each layer was closely connected. Its extensibility and tensile properties were good, and it had excellent temperature resistance and mechanical strength. The supramolecular gel had excellent tensile and compressive properties and good deformation recovery properties. When the elongation of the supramolecular gel reached 300%, the tensile stress was 2.33 MPa. When the compression ratio of supramolecular gel was 91.2%, the compressive stress could reach 4.78 MPa. The supramolecular gel could show an excellent plugging effect on complex loss layers with different fracture pore sizes, the plugging success rate could reach more than 90%, and the plugging layer could withstand 6.3 MPa external pressure. The smart plugging fluid prepared with supramolecular gel material could quickly form a fine barrier layer on the rock surface of the reservoir. It could effectively isolate drilling fluid from entering the reservoir and reduce the adverse effects, such as permeability reduction caused by drilling fluid entering the reservoir, so as to achieve the purpose of reservoir protection.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Supramolecular Gel Properties and Its Application in Drilling Fluid Plugging

Du,

Feng,

et al. 2023

Processes

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The Potential of Electrospinning/Electrospraying Technology in the Rational Design of Hydrogel Structures

Pan

Tian

et al. 2020

Macro Materials & Eng

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Hydrogels are soft materials with 3D cross‐linked networks of polymer chains that can absorb and hold large amounts of water. Hydrogels have attracted great attention of both scientific and industrial communities due to their diverse and fascinating functional properties, as well as their wide range of applications. According to the logic that the “structure determines function,” the structure fabrication plays the key role in hydrogel science. Hence, the rational design of hydrogel structure is a targeted guarantee of functions and applications of hydrogels. Additionally, diverse needs in hydrogel functions and applications require complex, effective, and ingenious hydrogel structures. Hence, in the current review, the potential of electrospinning (E‐spin)/electrospraying (E‐spray) technology in the design of hydrogel structures is comprehensively summarized due to the fact that E‐spin/E‐spray technology has great value for fabricating a wide range of material structures with tunable size and morphologies. This review not only serves as a reference for improving the comprehensive understanding of the structural design ability of E‐spin/E‐spray technology, but also provides forward‐looking ideas for utilizing E‐spin/E‐spray technique to fabricate hydrogels with different structure.

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Negatively thermodynamic toughening in double network hydrogel towards cooling-triggered multi-shape memory effect

Wang

et al. 2021

Smart Mater. Struct.

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This paper explores fundamental mechanisms of negatively thermodynamic toughening during microphase separations of double network (DN) hydrogels, which have dynamically coordinating components with adjustable swelling behavior and designable multi-shape memory effect (multi-SME). Based on the Flory-Huggins theory and Fick's second law, a thermodynamic model is formulated to study the diffusive dynamics, cooling-triggered multi-SME and mechanical toughness of the DN hydrogels. The negatively thermodynamic toughening effect of the DN hydrogels is strongly dependent on their water concentration, hydrophobic transition and microphase separation. Finally, effectiveness of this new model is demonstrated by applying it to predict dual-SME, quadruple-SME and cooling-triggered shape memory behaviors of DN hydrogels. This study provides a methodology for the design of shape memory DN hydrogels with tunable, giant and programmable cooling-triggered multi-SME.

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Unraveling bio-inspired pre-swollen effects of tetra-polyethylene glycol double network hydrogels with ultra-stretchable yielding strain

Abstract: Qing (2019) Unraveling bioinspired pre-swollen effects of tetra-polyethylene glycol double network hydrogels with ultrastretchable yielding strain. Smart Materials and Structures, 28 (3). 035005.

Cited by 3 publications

References 43 publications

Evaluation of Supramolecular Gel Properties and Its Application in Drilling Fluid Plugging

Evaluation of Supramolecular Gel Properties and Its Application in Drilling Fluid Plugging

The Potential of Electrospinning/Electrospraying Technology in the Rational Design of Hydrogel Structures

Negatively thermodynamic toughening in double network hydrogel towards cooling-triggered multi-shape memory effect

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