Copolymerization of 2-(perfluorohexyl)ethyl methacrylate with divinylbenzene to fluorous porous polymeric materials as fluorophilic absorbents

Tang, Huiling; Gou, Yuehua; Yan, Zhengdong; Hu, Qingqing; Zhang, Fumin; Zhong, Yijun; Zhu, Weidong

doi:10.1016/j.micromeso.2020.110398

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…Moreover, DVB is introduced into oil-based gel polymer chain as a rigid crosslinking agent, which can increase chain stiffness and network thermal stability. [29][30][31] The oil-based gel solution was pumped into the formation and gelled at high temperature, so BPO with strong temperature resistance was selected as the initiator. After the initiator decomposition, the unsaturated bond activity in the gelling agent and cross-linking agent was improved, which accelerated reaction speed.…”

Section: Gelation Mechanismmentioning

confidence: 99%

Experimental study on an oil‐based polymer gel for lost circulation control in high‐temperature fractured formation

Qiu

Bai

Sun

et al. 2021

J of Applied Polymer Sci

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Aiming at the lack of plugging agent for oil‐based drilling fluid leakage in fractured formation, an oil‐based gel‐plugging agent with high structural strength and strong thermal stability was synthesized based on monomer polymerization and crosslinking. According to the preparation experiment, when the total concentration of methyl methacrylate (MMA) and butyl acrylate (BA) is 30% and the ratio is 6:4, the oil‐based gel solution can be completely gelatinized from 80 to 200°C, which has high gel strength and controllable gelation time. The effects of total concentration of BA and MMA, the ratio of BA and MMA, synthesis temperature, oil‐based drilling fluid invasion, shear effect, and fiber concentration on gelling performance were systematically studied. Fourier transform infrared molecular structure analysis showed that the oil‐based gel contained benzene ring group and ester characteristic group. From the rheological properties of oil‐based gel with 30% gelling agent at 160°C, it could be seen that the elastic modulus G′ of 10 Hz is 232 kPa, which is much larger than the storage modulus G″ is 99 kPa, which reflects the solid properties and has good elasticity and high strength. The displacement experiment of sand filling pipe and dynamic and static plugging experiment of high temperature and high pressure shows that the oil‐based gel has high bearing capacity in fractures and sand filling pipe. The bearing pressure is 3.01 MPa in 6 mm fractures, and the bearing pressure gradient is 0.602 MPa/cm.

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Section: Gelation Mechanismmentioning

confidence: 99%

Experimental study on an oil‐based polymer gel for lost circulation control in high‐temperature fractured formation

Qiu

Bai

Sun

et al. 2021

J of Applied Polymer Sci

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Adsorber Charge Dominates over Hydrophobic or Fluorophilic Functionalization in Influencing Adsorption of PFCA onto Polystyrene Resins

Junge,

Wittwer,

Sommerfeld

et al. 2024

Adv Materials Inter

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A systematic series of industrial‐relevant polystyrene‐based anion exchange resins that are functionalized with hydro‐ or fluorocarbon chains are compared regarding their adsorption behavior toward perfluorocarboxylic acids (PFCA) in respect to their charge, chain length, and type of chain. The results clearly show the dominance of electrostatic interactions in the adsorption process as uncharged adsorber materials showed no adsorption at all. In contrast, the charged adsorber materials showed in general a PFCA removal of 80% to 30% over the experiment depending on effluent fraction. Unexpectedly, for perfluorobutanoic acid (PFBA) the highest removal rate is found with consistently >90%. Despite observing significant benefits in the adsorption of PFCA for fluoroalkylated adsorbers in comparison to their non‐fluorinated counterparts, this effect of fluoroalkylation is comparatively small and can not be clearly attributed to fluorophilic interactions between the fluoroalkyl chains. These findings help clarifying that the introduction of fluorocarbon moieties in adsorber materials is not necessary in order to remove fluorocarbon molecules from the environment.

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Amphiphilic Polyphosphazene for Fluorocarbon Emulsion Stabilization

Wang,

Liu,

Zang

et al. 2024

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High internal phase emulsions (HIPEs) have been of great interest for fabricating fluorinated porous polymers having controlled pore structures and excellent physicochemical properties. However, it remains a challenge to prepare stable fluorocarbon HIPEs, due to the lack of suitable surfactants. By randomly grating hydrophilic and fluorophilic side chains to polyphosphazene (PPZ), a comb‐like amphiphilic PPZ surfactant with biodegradability is designed and synthesized for stabilizing water/fluorocarbon oil‐based emulsions. The hydrophilic–lipophilic balance of PPZs can be controlled by tuning the grating ratio of the two side chains, leading to the preparation of stable water‐in‐oil HIPEs and oil‐in‐water emulsions, and the production of fluorinated porous polymers and particles by polymerizing the oil phase. These fluorinated porous polymers show excellent thermal stability and, due to the hydrophobicity and porous structure, applications in the field of oil/water separation can be achieved.

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Copolymerization of 2-(perfluorohexyl)ethyl methacrylate with divinylbenzene to fluorous porous polymeric materials as fluorophilic absorbents

Cited by 4 publications

References 30 publications

Experimental study on an oil‐based polymer gel for lost circulation control in high‐temperature fractured formation

Experimental study on an oil‐based polymer gel for lost circulation control in high‐temperature fractured formation

Adsorber Charge Dominates over Hydrophobic or Fluorophilic Functionalization in Influencing Adsorption of PFCA onto Polystyrene Resins

Amphiphilic Polyphosphazene for Fluorocarbon Emulsion Stabilization

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