2013
DOI: 10.1039/c3cc41059e
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CO2-switchable wormlike micelles

Abstract: A wormlike micellar system that undergoes a fully reversible, repeatable "sol-gel" transition upon alternative treatment with CO2 and N2 has been developed based on a C18-tailed polyamine surfactant.

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Cited by 158 publications
(125 citation statements)
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“…20 Hence, in the present system the viscoelastic fluid cannot be recovered by depleting carbon dioxide with nitrogen, a common way used in other wormlike micellar systems. [36][37][38][39] As displayed in Figure 5, the pH of the 100 mM erucic acid is as low as 4·38 and the dispersion appear opaque. When adjusting the pH of the solution to 11·16 by introducing NaOH at 60°C, the solution transforms into transparent as aforementioned; bubbling carbon dioxide to saturation leads the solution pH to 6·63, and it appears turbid as that of the 100 mM original erucic acid solution; nevertheless, even bubbling nitrogen at 85°C to displace carbon dioxide can only get the pH back to 9·22 (9·72 at 100°C) at which the solution is less viscous though the turbidity is decreased.…”
Section: Carbon Dioxide-responsive Mechanismmentioning
confidence: 99%
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“…20 Hence, in the present system the viscoelastic fluid cannot be recovered by depleting carbon dioxide with nitrogen, a common way used in other wormlike micellar systems. [36][37][38][39] As displayed in Figure 5, the pH of the 100 mM erucic acid is as low as 4·38 and the dispersion appear opaque. When adjusting the pH of the solution to 11·16 by introducing NaOH at 60°C, the solution transforms into transparent as aforementioned; bubbling carbon dioxide to saturation leads the solution pH to 6·63, and it appears turbid as that of the 100 mM original erucic acid solution; nevertheless, even bubbling nitrogen at 85°C to displace carbon dioxide can only get the pH back to 9·22 (9·72 at 100°C) at which the solution is less viscous though the turbidity is decreased.…”
Section: Carbon Dioxide-responsive Mechanismmentioning
confidence: 99%
“…Such one-component system is of great importance in some applications such as tertiary oil recovery where the wormlike micellar system free of hydrotropes can effectively prevent the 'chromatographic fractionation' from multicomponent displacing fluids. 40 On the other hand, in contrast with carbon dioxide-sensitive wormlike micellar systems formed by single UC22AMPM 38 or ODPTA, 37 erucic acid used here is akin to natural, renewable resources, which can be extracted from rapeseed plants, 55,56 without investing time and effort in organic synthesis. Moreover, both protonated UC22AMPM and ODPTA are cationic surfactants, which are generally more toxic and less biodegradable than anionic ones.…”
Section: Comparison With Other Carbon Dioxideresponsive Wormlike Micementioning
confidence: 99%
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“…Recently, particular interest has been focused on the design of WLMs that are responsive to external stimuli, such as pH, [18][19][20][21][22][23] CO 2 , [24][25][26] light, [27][28][29] and temperature.…”
Section: -17mentioning
confidence: 99%