Comparison of the effects of methyl- and chloro-substituted salicylate counterions on drag reduction and rheological behavior and micellar formation of a cationic surfactant

Lin, Zhi-Qing; Zheng, Yaguo; Talmon, Yeshayahu; Maxson, Andrew; Zakin, J. L.

doi:10.1007/s00397-015-0904-5

Cited by 9 publications

(7 citation statements)

References 10 publications

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“…The fraction of small worm-like micelles (2 orders of magnitude more petite than the longest one) is found to be the largest at [CTAB]/[NaSal] ≈ 2. Interestingly, viscoelastic measurements also hint at a viscosity maxima at [CTAB]/[NaSal] ≈ 2. , …”

Section: Resultsmentioning

confidence: 96%

“…However, with the advent of science and technology, especially the scattering , and electron microscopy , techniques, micelles of various shapes, such as spherical, ellipsoid, rodlike, threadlike, and wormlike have been detected and they are affected by pH, , ionic strength, temperature, presence of external molecules, , solvents, , and others . Among these, because of the unique structure , and high flexibility, wormlike micelles can solubilize many insoluble organic substances in water and have found their applications in various fields, such as applications in cosmetics, , drilling fluids and drug reducers …”

Section: Introductionmentioning

confidence: 99%

“…17 Among these, because of the unique structure 9,10 and high flexibility, 18 wormlike micelles can solubilize many insoluble organic substances in water 19 and have found their applications in various fields, such as applications in cosmetics, 20,21 drilling fluids 22 and drug reducers. 23 The Israelachvili model shows that wormlike micelles are formed when…”

Section: ■ Introductionmentioning

confidence: 99%

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Tracking Wormlike Micelle Formation in Solution: Unique Insight through Fluorescence Correlation Spectroscopic Study

2022

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Although worm-like micelles were invented 35 years ago, its formation pathway remains unclear. Inspired by the fact that a single molecular level experiment could provide meaningful and additional information, especially in a heterogeneous subpopulation, herein, we present a single molecular level study on the formation of wormlike micelles by cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) in water. Our results indicated a coexistence of normal spherical micelles along with a big wormlike micelle in its formation path. More interestingly, we have two unique insights into the formation mechanism, which are inaccessible in ensemble averaged experiments: (i) at extremely low concentrations of the surfactant, [CTAB]/[NaSal] ∼ 0.06, the wormlike micelle attains the highest size; and (ii) the relative concentration of wormlike micelles is highest when [CTAB]/[NaSal] ∼ 2.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Tracking Wormlike Micelle Formation in Solution: Unique Insight through Fluorescence Correlation Spectroscopic Study

2022

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“…The rheological properties of the SPR drag reducer measurements were carried out with a Rheometrics RFSII Couette rheometer equipped with sensitive transducers allowing measurements at shear rates as low as 0.02 s −1 42 . In the power‐law model, n (behavior index) is a measure of deviation from Newtonian behavior, and K (consistency index) is a measure of average viscosity 27 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and performance evaluation of a new drag reducer based on acrylamide/12‐allyloxydodecyl acid sodium

Chen¹,

Chang²,

Peng³

et al. 2021

J of Applied Polymer Sci

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Hydraulic fracturing with slickwater is a field‐proven stimulation technology used in tight reservoirs. Because of the high pumping rate associated with slickwater fracturing, drag reduction (DR) is critical in minimizing pressure drop and the success of oilfield operations. In this paper, a new type of drag reducer (SPR) was synthesized with acrylamide and 12‐allyloxydodecyl acid sodium, and its drag reduction performance was evaluated. The results showed that the new drag reducer features low molecular weight, fast‐dissolving rate and low interfacial tension. The algorithm of estimating the drag reduction rate of non‐Newtonian fluid SPR was proposed and validated. Empirical or semianalytical models for estimating the friction ratio (σ) or friction factor (λ or f) were used to simulate the turbulence behavior of the SPR drag reducer under different Reynolds numbers (Re). The modified Virk's correlation could accurately model the turbulent behavior of the SPR drag reducer. A unified calculation formula was established in this study for different pipe diameters.

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“…They investigated the influence of polymer molecular weight, polymer concentration, ionic strength of a solution and temperature on the drag reduction effect. Lin et al 4 researched aqueous solutions of a cationic surfactant and compared the effective drag reduction temperature range of different aqueous solutions. Boelens and Muthukumar 5 compared the polymer and fibre stress tensors in turbulent flow to analyse the drag reducing mechanism.…”

Section: Introductionmentioning

confidence: 99%

Study on drag reduction mechanism of rotating disk with micro-grooves

Wen

Wang

2017

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper presents the drag reduction mechanism of a rotating disk with micro-grooves. The flow characteristics of the micro-grooved disk at various rotating Reynolds numbers are investigated using experiments and large-eddy simulations. The results show that fluid in the gap between the disks undergoes circumferential movement, but fluid within the micro-grooves undergoes radial movement because of the dual function of wall rejection and boundary layer blockage. As a result, fluid within the micro-grooves moves very slowly and quietly. Hence, quiet and slow-moving fluid within the micro-grooves increases the thickness of the viscous sublayer and recedes mixed layer and suppresses the unstable motion. The mean relative velocity gradient of the immersed surface on the grooved disk becomes much lower than that of a smooth disk, and the contact area between the walls and the high-speed fluid is diminished. An interaction phenomenon between the micro-grooves and the gap could be discovered due to the micro-groove unenclosed structure. The interaction phenomenon makes the quiet fluid within the micro-grooves also suppresses the outside flow. Accordingly, a micro-grooved rotating disk has an obvious drag reduction effect compared with a rotating smooth disk.

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Comparison of the effects of methyl- and chloro-substituted salicylate counterions on drag reduction and rheological behavior and micellar formation of a cationic surfactant

Cited by 9 publications

References 10 publications

Tracking Wormlike Micelle Formation in Solution: Unique Insight through Fluorescence Correlation Spectroscopic Study

Tracking Wormlike Micelle Formation in Solution: Unique Insight through Fluorescence Correlation Spectroscopic Study

Synthesis and performance evaluation of a new drag reducer based on acrylamide/12‐allyloxydodecyl acid sodium

Study on drag reduction mechanism of rotating disk with micro-grooves

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