CO 2 -responsive smart wormlike micelles based on monomer and “pseudo” gemini surfactant

Wu, Xuepeng; Huang, Yongping; Fang, Sisi; Dai, Caili; Li, Hao; Xu, Zhongliang; Zhao, Mingwei

doi:10.1016/j.jiec.2017.11.021

Cited by 37 publications

(12 citation statements)

References 38 publications

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“…As the pH value of the mixed solution decreased, the value of R h also decreased. The dynamic light scattering test results show that the change in the macroscopic viscoelasticity of the mixed system is caused by the change in the structure of the micellar aggregates in the solution ( Wu et al, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Performance Evaluation and Mechanism Study of Seawater-Based Circulatory Fracturing Fluid Based on pH-Regulated WormLike Micelles

Tang¹,

Song

Min

et al. 2022

Front. Chem.

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In this article, a novel salt-resistant pH-sensitive surfactant N-carboxystearamido methanesulfonic acid (MSA) was designed and synthesized. The rheological properties of the MSA/CTAB mixed system prepared using seawater were evaluated, and the variation laws of the related rheological parameters were discussed. The relevant fracturing technical parameters of the MSA/CTAB mixed system were comprehensively evaluated. The wormlike micelles formed by the non-covalent binding of MSA and CTAB molecules can resist the electrostatic effect of inorganic salts in the seawater. Meanwhile, the MSA/CTAB mixed system has an excellent pH response and revealed that the change from wormlike micelles to spherical micelles leads to the decrease of the apparent viscosity and the transition from Maxwell fluid to Newton-type fluid. Furthermore, the MSA/CTAB mixed system has excellent cyclic fracturing performance, which can meet the dual requirements of fracturing fluid cost and performance of offshore oilfield, and has a good application prospect.

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Section: Resultsmentioning

confidence: 99%

Performance Evaluation and Mechanism Study of Seawater-Based Circulatory Fracturing Fluid Based on pH-Regulated WormLike Micelles

Tang¹,

Song

Min

et al. 2022

Front. Chem.

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“…More interestingly, WLMs can be made responsive to external stimuli such as light, − temperature, ,, pH, ,− CO 2 , ,− redox reaction, , and even a combination of stimuli. ,, These systems, called “smart” WLMs, have a common feature in that the stimulus causes a drastic change in the size (contour length) of the WLM chains. In turn, the rheological properties of the WLM solution such as its zero-shear viscosity (η 0 ) or its relaxation time (τ R ) can be varied by orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

“…There are several studies describing smart WLMs that are responsive to pH. The various strategies in these studies include the use of a pH-responsive surfactant, ,, the combination of a conventional surfactant and a pH-responsive organic compound such as oxalic acid, hydroxycinnamic acid, or benzenedioic acid, and the incorporation of CO 2 . ,− It is possible to formulate pH-responsive WLMs that can be triggered over any pH rangeacidic, , neutral, or basic. , WLMs that are responsive under acidic conditions are particularly attractive as they could have an important application in oil recovery (acid diversion in carbonate rocks). , …”

Section: Introductionmentioning

confidence: 99%

Light-Triggered Rheological Changes in a System of Cationic Wormlike Micelles Formulated with a Photoacid Generator

2020

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“Smart” fluids displaying large changes in their rheological properties in response to external stimuli have been of great interest in recent years. For example, “smart” wormlike micelles (WLMs) that respond to pH can be readily formulated by combining a cationic surfactant such as cetyltrimethylammonium bromide (CTAB) with an aromatic compound such as 1,2-dihydroxybenzene (DHB). Here, we show that a pH-responsive aqueous formulation as mentioned above can be simultaneously made responsive to ultraviolet (UV) light by incorporating a photoacid generator (PAG) into the system. A commercially available PAG, diphenyliodonium-2-carboxylate, is used here. Upon exposure to UV light, this PAG irreversibly photolyzes into iodobenzene (IB) and benzoic acid (BA), with the formation of BA, leading to a drop in pH. WLMs formed by mixtures of CTAB, DHB, and the PAG are systematically characterized before and after UV irradiation. As the PAG photolyzes, an increase in the viscosity of WLMs occurs by a factor of 1000. We show that the ratio of the zero-shear viscosity η0 (after UV/before UV) depends on the initial pH of the sample. The UV-induced increase in η0 can be attributed to the growth of WLMs in solution, which in turn is influenced by both the ionization state of DHB and the presence of IB and BA.

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“…Surfactants are special molecules with hydrophilic headgroups and hydrophobic tails, which self-assemble in solution (Calabrese and Wagner, 2018;Danov et al, 2018;Kelleppan et al, 2018;Wu et al, 2017;Zhao et al, 2013Zhao et al, , 2017a. Depending on concentration and ionic strength, surfactants can self-assemble to form various aggregates with different morphologies, such as spherical micelles, rodlike micelles, wormlike micelles, vesicles, and lamellar crystals (Chu et al, 2013;Patel et al, 2015;Sharma et al, 2007;Shrestha et al, 2015;Dai et al, 2015;Kang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Nanoparticles on Wormlike Micelles with Different Entanglement Degrees

Zhao

Gao

Dai

et al. 2019

J Surfact & Detergents

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Enhancing the viscoelastic properties of wormlike micelles by adding nanoparticles has been widely reported. Various mechanisms have been proposed to explain how nanoparticles strengthen the network formed by wormlike micelles. It remains unclear whether nanoparticles produce the same effect on systems with different entanglement degrees. To clarify this issue, the concentration of potassium chloride was used to control the entanglement degree of wormlike micelles. The rheological behavior of different nanoparticle‐enhanced wormlike micellar systems (NEWMS) was investigated using rheology. Three critical parameters including zero‐shear viscosity (η0), relaxation time (τR), and contour length (L) were calculated to analyze the effect of nanoparticles on the different wormlike micellar systems. An appropriate mechanism describing the interaction between nanoparticles and wormlike micelles with different structures was proposed.

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CO 2 -responsive smart wormlike micelles based on monomer and “pseudo” gemini surfactant

Cited by 37 publications

References 38 publications

Performance Evaluation and Mechanism Study of Seawater-Based Circulatory Fracturing Fluid Based on pH-Regulated WormLike Micelles

Performance Evaluation and Mechanism Study of Seawater-Based Circulatory Fracturing Fluid Based on pH-Regulated WormLike Micelles

Light-Triggered Rheological Changes in a System of Cationic Wormlike Micelles Formulated with a Photoacid Generator

Effect of Silica Nanoparticles on Wormlike Micelles with Different Entanglement Degrees

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