Wormlike micelles formed by ultra-long-chain nonionic surfactant

Wang, Jiuxia; Zhang, Yongmin; Chu, Zonglin; Feng, Yujun

doi:10.1007/s00396-021-04848-z

Cited by 8 publications

(7 citation statements)

References 51 publications

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“…It can be seen from the diagram that the shear viscosity of the system is independent of the shear rate when the total concentration is less than 10 mmol·L −1 , showing a significant Newton fluid character ( Mushi et al, 2021 ). When extrapolating the viscosity curve to zero shear rate yields a zero shear viscosity η 0 of 0.4 mPa·s, very close to the viscosity of water, which generally indicates that the solution is dominated by small spherical or short stick aggregates ( Wang et al, 2021 ). When the total concentration was higher than 20 mmol·L −1 , the solution showed different characteristic viscosity curves: Newton plateau appeared at the low shear rate, and shear thinning appeared after the shear rate reached the critical value.…”

Section: Resultsmentioning

confidence: 66%

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: 66%

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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“…This was most extreme for longer C5 and C6 tailed surfactant analogues ( AZO- n- C5 and AZO- n- C6 ); however, it was observed to some extent for all of the analyzed molecules. As mentioned earlier, even with the addition of the azobenzene functionality, these surfactants all have hydrophobic regions equivalent to ≤16 carbons in length, precluding them from consideration as ultralong (>C16) tailed surfactants or lipid-like surfactants. − Despite this, we believe that, like longer tailed surfactants, this library of azo-surfactants may be forming small, preaggregate structures at concentrations below their CMC. Such pre-CMC aggregation has been seen for molecularly complex surfactants previously .…”

Section: Resultsmentioning

confidence: 90%

Structure–Performance Relationships for Tail Substituted Zwitterionic Betaine–Azobenzene Surfactants

et al. 2022

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Azobenzene-containing surfactants (azo-surfactants) have garnered significant attention for their use in generating photoresponsive foams, interfaces, and colloidal systems. The photoresponsive behavior of azo-surfactants is driven by the conformational and electronic changes that occur when the azobenzene chromophore undergoes light-induced trans ⇌ cis isomerization. Effective design of surfactants and targeting of their properties requires a robust understanding of how the azobenzene functionality interacts with surfactant structure and influences overall surfactant behavior. Herein, a library of tail substituted azosurfactants were synthesized and studied to better understand how surfactant structure can be tailored to exploit the azobenzene photoswitch. This work shows that tail group structure (length and branching) has a profound influence on the critical micelle concentration of azo-surfactants and their properties once adsorbed to an air−water interface. Neutron scattering studies revealed the unique role that intermolecular π−π azobenzene interactions have on the self-assembly of azo-surfactants, and how the influence of these interactions can be tuned using tail group structure to target specific aqueous aggregate morphologies.

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“…In addition, the erucylamidobenzoate-based ULILSs alone can self-assemble into elongated WLMs and then form a threedimensional network at relatively concentration as well as erucic acid-based carboxylbetaine, 51 poly(ethylene oxide) monomethyl ethers, 52 and ammoniums, 53 producing a singlecomponent viscoelastic fluid, whereas neither common shortchain anionic ILSs (Figure S11) nor ErCho can. 2,14 In comparison, common NaOEr not only needs the hydrotropes to promote the dissolution, but also needs higher concentration to thicken.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In addition, the erucylamidobenzoate-based ULILSs alone can self-assemble into elongated WLMs and then form a three-dimensional network at relatively concentration as well as erucic acid-based carboxylbetaine, poly(ethylene oxide) monomethyl ethers, and ammoniums, producing a single-component viscoelastic fluid, whereas neither common short-chain anionic ILSs (Figure S11) nor ErCho can. , In comparison, common NaOEr not only needs the hydrotropes to promote the dissolution, but also needs higher concentration to thicken. Because of single-component and negative charge, the viscoelastic fluid based on erucylamidobenzoate-based ULILSs is impossible to occur “chromatographic fractionation” that always occurs in multicomponent displacing fluids or loss because of the adsorption on the negatively charged solid surfaces .…”

Section: Resultsmentioning

confidence: 99%

Ultralong-Chain Ionic Liquid Surfactants Derived from Natural Erucic Acid

Zhang

Meng

Liu³

2022

ACS Sustainable Chem. Eng.

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Ionic liquid surfactants (ILSs) have shown increasing promise for substituting the traditional amphiphiles because of their flexible tunability and advantageous physicochemical properties. However, the improvement of common ILSs in terms of self-assembly ability and thickening ability remains a significant challenge. Herein, two novel ultralong-chain ILSs (ULILSs), ErBCho (choline cis-4-erucylamidobenzoate) and ErBBTA (benzyltrimethylammonium cis-4-erucylamidobenzoate), were designed and synthesized from natural unsaturated fatty acid (erucic acid). Their structures were characterized via 1H NMR, 13C NMR, and electrospray ionization-mass spectrometry techniques, and physicochemical properties were evaluated by surface tension, polarized optical microscopy, and rheology. The insertion of a phenyl ring between the charged headgroup and unsaturated C22-tail significantly enhanced the hydrophobicity of ULILSs, but they retained the desirable characteristics of ILSs (low melting temperature) and excellent water-solubility (Krafft temperature <4 °C), for application in low-temperature water. Compared with counterparts without a phenyl ring, the critical micelle concentration (cmc) of the presented ULILSs was markedly decreased by at least an order of magnitude (particularly cmc of ErBBTA 3.5 μM), and interfacial activity was higher (larger pC 20). In particular, the current ULILSs were able to form wormlike micelles on their own and then thicken the solution at relatively low overlapping concentrations (1.68–5.71 mM), without any additives and regardless of counterions. More importantly, viscoelastic fluids formed by the current ULILSs (especially ErBBTA) were not only resistant to high temperature and cycled shear but also exhibited excellent sand-carrying and oil-induced gel-breaking performances. Such ULILSs have shown promise to replace those common surfactants in hydro-fracturing and other applications.

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Wormlike micelles formed by ultra-long-chain nonionic surfactant

Cited by 8 publications

References 51 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

Structure–Performance Relationships for Tail Substituted Zwitterionic Betaine–Azobenzene Surfactants

Ultralong-Chain Ionic Liquid Surfactants Derived from Natural Erucic Acid

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