Magnetic surfactants: A review of recent progress in synthesis and applications

Shehzad, Farrukh; Hussain, Syed Muhammad Shakil; Adewunmi, Ahmad A.; Mahboob, Ahmad; Murtaza, Mobeen; Kamal, Muhammad Shahzad

doi:10.1016/j.cis.2021.102441

Cited by 30 publications

(20 citation statements)

References 71 publications

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“…Switchable surfactants have received increasing interest in recent years − since they can reversibly regulate their interfacial activities through environmental stimuli, such as pH, CO 2 , light, redox reactions, , and magnetic fields. , Among the above-mentioned stimuli, pH is an attractive trigger because of its promising applications in pharmaceuticals, enhanced oil recovery, and textile treatment. − Sodium carboxylate-derived surfactants are one type of pH-responsive surfactants, which are commonly recognized as green surfactants and are synthesized from sustainable and biocompatible fatty acids. , However, the carboxylate surfactants with long alkyl chains always suffer from low solubility in water due to their high Krafft point, which hinders their application in many fields as an efficient surfactant.…”

Section: Introductionmentioning

confidence: 99%

pH-Responsive Behavior of Pickering Emulsions Stabilized by a Selenium-Containing Surfactant and Alumina Nanoparticles

et al. 2021

Langmuir

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Herein, we describe pH-responsive Pickering emulsions stabilized by a sodium carboxylate-derived selenium surfactant (C 10 -Se-C 10 •(COONa) 2 ) in combination with positively charged alumina nanoparticles. Unlike other bola-type carboxylate surfactants (e.g., disodium eicosanoate), C 10 -Se-C 10 •(COONa) 2 is soluble in water with a low Krafft temperature (36.1 °C). The emulsions are sensitive to pH variations, and efficient demulsification can be achieved by a pH trigger. The carboxylic sodium group in the C 10 -Se-C 10 •(COONa) 2 structure can be reversibly cycled between its anionic and nonionic states (carboxylic acid), resulting in a pH-controlled electrostatic attraction between the surfactant and alumina. The Pickering emulsion can be reversibly switched between "on" (stable) and "off" (unstable) states by pH at least four times. Compared with the emulsions stabilized by specially synthesized stimuli-responsive particles or surfactants, the method reported here is much easier to implement and requires very low concentrations of the surfactant and nanoparticles, with potential applications in the fields of biomedicine, drug delivery, and cosmetics.

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Section: Introductionmentioning

confidence: 99%

pH-Responsive Behavior of Pickering Emulsions Stabilized by a Selenium-Containing Surfactant and Alumina Nanoparticles

et al. 2021

Langmuir

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“…More recently, magnetic surfactants, a new class of surfactant, are gaining significant attention due to their magneto-responsive properties [ 37 , 38 , 39 ]. The surface and interfacial properties of the new surfactant have been perused.…”

Section: Introductionmentioning

confidence: 99%

“…The surface and interfacial properties of the new surfactant have been perused. As compared to conventional surfactants, the magnetic surfactant is highly efficient in lowering the surface tension and is characterized by low critical micelle concentration [ 37 ]. Due to its versatility and good properties, the surfactant has found wide applications in biotechnology, oil remediation, catalysis, water separation, and oilfield applications.…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Surfactant Having One Degree of Unsaturation in the Hydrophobic Tail as a Shale Swelling Inhibitor

et al. 2023

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One of the foremost causes of wellbore instability during drilling operations is shale swelling and hydration induced by the interaction of clay with water-based mud (WBM). Recently, the use of surfactants has received great interest for preventing shale swelling, bit-balling problems, and providing lubricity. Herein, a novel synthesized magnetic surfactant was investigated for its performance as a shale swelling inhibitor in drilling mud. The conventional WBM and magnetic surfactant mixed WBM (MS–WBM) were formulated and characterized using Fourier Transform Infrared (FTIR) and Thermogravimetric analyzer (TGA). Subsequently, the performance of 0.4 wt.% magnetic surfactant as shale swelling and clay hydration inhibitor in drilling mud was investigated by conducting linear swelling and capillary suction timer (CST) tests. Afterward, the rheological and filtration properties of the MS–WBM were measured and compared to conventional WBM. Lastly, the swelling mechanism was investigated by conducting a scanning electron microscope (SEM), zeta potential measurement, and particle size distribution analysis of bentonite-based drilling mud. Experimental results revealed that the addition of 0.4 wt.% magnetic surfactant to WBM caused a significant reduction (30%) in linear swelling. SEM analysis, contact angle measurements, and XRD analysis confirmed that the presence of magnetic surfactant provides long-term swelling inhibition via hydrophobic interaction with the bentonite particles and intercalation into bentonite clay layers. Furthermore, the inhibition effect showed an increase in fluid loss and a decrease in rheological parameters of bentonite mixed mud. Overall, the use of magnetic surfactant exhibits sterling clay swelling inhibition potential and is hereby proffered for use as a drilling fluid additive.

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“…Recently, a new class of surfactants (known as magnetic surfactants) has emerged, which is sensitive to a magnetic field and has unique and extraordinary physiochemical properties, having applications in the fields of purification, adsorption, and separation. Magnetic surfactants have found many applications in drilling fluids for the enhancement of shale swelling inhibition and preserving the integrity of wellbore formations. , Magnetic surfactants have multi-cation (such as d-block or f-block elements) in the surfactant’s head group, which results in long-range interactions with other elements. A few studies in the literature have reported the use of magnetic surfactants in drilling fluid applications.…”

Section: Introductionmentioning

confidence: 99%

Application of Novel Magnetic Surfactant-Based Drilling Fluids for Clay Swelling Inhibition

et al. 2023

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Water-based drilling fluids are widely employed in the oilfield industry for the efficient and smooth drilling of wellbore reservoirs. In this study, a novel drilling formulation was prepared by mixing a magnetic surfactant in the base mud formulation. Several drilling fluid tests were conducted, which include steady shear and dynamic rheology, filtration, clay sedimentation, clay swelling, and particle size distribution analysis. Different analytical techniquesXRD, FTIR, and TGA analyseswere performed to study the interactions of magnetic surfactant with the clay platelets. The experimental results of the surfactant-modified formulations were compared to the base mud formulation. Thermal gravimetric analysis of the surfactant-modified mud showed improved thermal stability compared to the base mud. FTIR analysis results of the base mud and surfactant-modified mud were compared. In the steady shear rheology experiments, the flow curves of the base mud and surfactant-modified mud showed that the addition of surfactant in the base mud affects the shear stress of formulation. The shear stress data of rheology was fitted to the Herschel–Bulkley model, and model parameters trends were assessed with and without the addition of surfactant in the base mud. Shale inhibition tests showed that the incorporation of magnetic surfactant minimized the clay hydration of swelling, thus proving a superior shale inhibitor. The particle size analysis showed that the average particle size of clay particles increased with the increasing concentration of the magnetic surfactant. The linear swelling analysis of clay showed that the rate of swelling was 90% in the surfactant-modified mud as compared to the swelling rate in deionized water. According to the zeta potential, the combination of surfactants significantly affects the electrokinetic behavior of dispersion. Further, the XRD proved that the interlayer spacing of clay increasing while interacting with magnetic surfactant molecules indicates the ability of magnetic surfactant as a shale swelling and hydration inhibitor for water-based drilling formulations.

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Magnetic surfactants: A review of recent progress in synthesis and applications

Cited by 30 publications

References 71 publications

pH-Responsive Behavior of Pickering Emulsions Stabilized by a Selenium-Containing Surfactant and Alumina Nanoparticles

pH-Responsive Behavior of Pickering Emulsions Stabilized by a Selenium-Containing Surfactant and Alumina Nanoparticles

A Magnetic Surfactant Having One Degree of Unsaturation in the Hydrophobic Tail as a Shale Swelling Inhibitor

Application of Novel Magnetic Surfactant-Based Drilling Fluids for Clay Swelling Inhibition

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