A novel temperature-sensitive expandable lost circulation material based on shape memory epoxy foams to prevent losses in geothermal drilling

Cui, Kaixiao; Jiang, Guancheng; Xie, Chiyu; Yang, Lili; He, Youwei; Shen, Xiulun; Wang, Xingxing

doi:10.1016/j.geothermics.2021.102145

Cited by 37 publications

(21 citation statements)

References 33 publications

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“…1−5 Take heat-triggered SMPs for example, and the shape memory process could be concluded into two stages. 6,7 In stage I, after heating to the transition temperature, SMPs are deformed into the temporary shape via the external force and keep stable while the temperature is reduced, which is called shape fixity. In stage II of the shape recovery process, SMPs spontaneously recover to the original shape while the temperature reaches the transition temperature again.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Stimuli-responsive materials, capable of perceiving external stimuli and making response, possess wide application potential and have attracted researchers’ attention. Shape memory polymers (SMPs), as a typical kind of stimuli-responsive material, could memorize a temporary shape after the deformation and recover to the permanent shape upon the external stimuli, including heat, electricity, light, magnetic field, and solvent. − Take heat-triggered SMPs for example, and the shape memory process could be concluded into two stages. , In stage I, after heating to the transition temperature, SMPs are deformed into the temporary shape via the external force and keep stable while the temperature is reduced, which is called shape fixity. In stage II of the shape recovery process, SMPs spontaneously recover to the original shape while the temperature reaches the transition temperature again.…”

Section: Introductionmentioning

confidence: 99%

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Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Yang

Leng

2022

ACS Appl. Polym. Mater.

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We synthesized shape memory poly(aryl ether ketone) (PAEK) and grafted carboxylic acid pyridine zwitterions onto the main chains for fabricating the zwitterionic PAEK (ZPAEK) material. ZPAEK exhibited a T g of around 120 °C, great thermal stability, and mechanical performances, and heat-triggered shape memory behaviors, including high shape recovery ratio (over 98.7%) and fixity ratio (over 98%). Besides, we improved the hydrophilicity of PAEK by incorporating carboxylic acid pyridine zwitterions, for the first time, achieving the exceptional water-actuated shape memory behaviors for PAEK at room temperature. Furthermore, the controllable reconfiguration behaviors were achieved through the interaction between carboxylic acid pyridine zwitterions and water molecules. For the sample of any temporary shape, after absorbing water, its previous original shape was eliminated, and the deformed temporary shape could be redefined as the “original” shape to construct an unprecedented shape memory cycle, never returning to the first original shape. Additionally, the excellent triple shape memory behaviors of sample were obtained after absorbing water. After the programmable shape fixation processes, the sample of temporary shape could recover to the original shape through the two stages: one was at 110 °C, and the other was at 140 °C. We did believe the water-actuated, reconfigurable, and triple shape memory ZPAEK could be an ideal substitute material for smart sensors and actuators.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Yang

Leng

2022

ACS Appl. Polym. Mater.

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“…Shape memory polymers (SMPs), as a classic kind of smart polymer materials, are able to memorize a temporary shape, perceive the external stimuli, and spontaneously recover to the original shape. − Generally, SMPs are composed of two phases: flexible regions and rigid regions, which together contribute to the programable manipulations of shape memory effect (SME). , Flexible regions, usually containing soft chains and amorphous phases, could be transformed upon external stimuli. In this stage, the temporary shape of SMPs could be obtained by the external force.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Shape Memory Metal-Coordinated Poly(aryl ether ketone)s with Tunable Gradient-Deformation Behaviors as well as Self-Healing and Reprocessing Abilities

Yang

Leng

2022

ACS Appl. Mater. Interfaces

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Reversible dynamic bonds are able to crack and recombine upon external stimuli, which endow polymers with exceptional self-healing, reprocessing, and reversible deformation ability. In this paper, we integrated the metal coordination bonds into shape memory poly(aryl ether ketone) (PAEK) to fabricate smart materials with multifunctionalities. Through tuning the metal ion content and species, the enhancement of shape memory behaviors was achieved, including the high recovery ratio (over 98%) and fixity ratio (over 98%), which was closely related to the synergic effect of the intrinsic motion ability of PAEK matrix and the cracking-recombination of coordination bonds. Besides, through the combination of the components with different Cu 2+ contents, in addition to the components with Fe 2+ coordination bonds, we fabricated the gradient shape memory structures with controllable shape memory and recovery behaviors. The manipulation of gradient coordination bonds resulted in different shape recovery speeds and directions. Furthermore, due to the dynamic cracking-recombination of coordination bonds, the metal-coordinated PAEK material exhibited the great selfhealing and reprocessing performances, which were significant for largely extending its application range.

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“…The three-point bending mode was implemented perpendicularly to the foam, this mode has been shown as an efficient technique to characterize more rigid and dense foams of different polymers. 60,61 The test condition was fixed at a frequency of 1 Hz, amplitude of 1 μm, and temperature range of −60 to +60°C with a heating rate of 5°C/min.…”

Section: Methodsmentioning

confidence: 99%

Natural rubber/wood composite foam: Thermal insulation and acoustic isolation materials for construction

et al. 2023

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With the advances in the field of civil construction and the world population growth, the development of policies is necessary for the management and reuse of generated residue. Thus, the present work proposes the use of expanded natural rubber as a polymeric matrix incorporated with eucalyptus filler as a reinforcing filler for the production of composites. Thermal insulation capacity was determined by the transient plane source and acoustic method by impedance tube. NR/W40 foam showed enhanced the acoustic insulation capacity. The maximum absorption of NR/W40 was 0.83, at 3257 Hz, which is three times higher than natural rubber foam. Highly inhomogeneous cell structures were observed with large, interconnected pores, improving the acoustic performance. Sound absorption coefficient for natural rubber foam with 40% wood (0.83 ± 0.046) was similar to PU foam (0.97 ± 0.009) with 20 mm in thickness, a density of 47 kg/m3 and 98% open cell content it is a well-known acoustic absorbent in the building sector. The NR/W40 sample recorded the best acoustic performance among the NR foams analyzed in this work, maintaining good sound absorption above 1500 Hz, demonstrating a possibility of wood reuse as a filler in based-rubber foam for acustic insulation.

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A novel temperature-sensitive expandable lost circulation material based on shape memory epoxy foams to prevent losses in geothermal drilling

Cited by 37 publications

References 33 publications

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Enhanced Shape Memory Metal-Coordinated Poly(aryl ether ketone)s with Tunable Gradient-Deformation Behaviors as well as Self-Healing and Reprocessing Abilities

Natural rubber/wood composite foam: Thermal insulation and acoustic isolation materials for construction

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