Interaction of a Zwitterionic Surfactant with Synthetic Clays in Aqueous Suspensions: A Multinuclear Magnetic Resonance Study

Grandjean, Jean

doi:10.1006/jcis.2001.7556

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…Therefore, the zwitterionic surfactant-modified montmorillonites (ZSMMs) may have high sorption capacities towards cationic organic pollutants via electrostatic interactions. However, until now few studies were done on ZSMMs, and the properties and microstructures of ZSMMs are still unclear [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of zwitterionic surfactant-modified montmorillonites

Zhu

Qing

Wang

et al. 2011

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of zwitterionic surfactant-modified montmorillonites

Zhu

Qing

Wang

et al. 2011

Journal of Colloid and Interface Science

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“…In the past few years, we have used nuclear magnetic resonance (NMR) methods to characterize the interaction of cationic, nonionic, , and zwitterionic surfactants with synthetic clays in aqueous suspensions, showing how the structure and charge density of the clay modulate this interaction. The lamellar structure of clays, also named phyllosilicates, consists of layers formed by condensation of sheets of linked Si(O,OH) 4 tetrahedra with those of linked M 2 - 3 (OH) 6 octahedra, where M is either a divalent or a trivalent cation.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Molecules Intercalated in Laponite as Studied by ¹³C and ²⁹Si MAS NMR

2002

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The structure and dynamics of surfactant molecules intercalated in Laponite have been characterized by solid-state 13 C NMR relaxation times and 13 C-and 29 Si-detected proton relaxation times. These results are compared to similar data obtained for a surfactant intercalated in montmorillonite and for different mesoporous materials. As compared with montmorillonite clay, a higher mobility and a greater percentage of the gauche conformation of the surfactant molecules are found in Laponite. The 29 Si-detected proton relaxation times in the rotating frame are sensitive to the amount of intercalated surfactant.

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“…As part of our investigations on synthetic clay suspensions, we have studied the properties of Na + and Li + cations that counterbalance the negative charges of clay platelets. The strength of the cation interaction with the solid surface affects its environment, and modulates the interaction of nonionic (Grandjean & Robert, 1999;Gevers & Grandjean, 2001), and zwitterionic (Grandjean, 2001) surfactants with clays. Surfactant interaction is found with Laponite and low-charge saponites in suspension.…”

mentioning

confidence: 99%

²³Na 2D 3QMAS NMR and ²⁹Si, ²⁷Al MAS NMR investigation of Laponite and synthetic saponites of variable interlayer charge

2003

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Abstract29Si, 27Al MAS NMR is used to characterize Laponite RD and synthetic saponites of variable interlayer charge. The Si/Al ratios are in good agreement with the calculated charge from chemical analysis except for the lowest-charged saponite. In contrast to the 29Si MAS NMR spectra in which resolved signals are detected, the 27Al MAS NMR spectra show one signal whose linewidth increases with the clay charge. The water content of the clay samples was obtained from 1H MAS NMR.The 2D MQMAS NMR technique is required to obtain a high-resolution spectrum of nuclei with strong quadrupolar interaction. This method was applied to the 23Na nucleus of clay counterions and to the 27Al structural nucleus. One well-defined 23Na NMR signal is observed for all the clays studied except the highest-charged saponite. Possible explanations for this different behaviour are discussed. The calculated isotropic chemical shift evolves progressively with the clay charge whereas the deduced quadrupolar interaction does not change significantly. The 27Al 2D 3QMAS technique was not able to resolve more than one signal.

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Interaction of a Zwitterionic Surfactant with Synthetic Clays in Aqueous Suspensions: A Multinuclear Magnetic Resonance Study

Cited by 9 publications

References 25 publications

Preparation and characterization of zwitterionic surfactant-modified montmorillonites

Preparation and characterization of zwitterionic surfactant-modified montmorillonites

Surfactant Molecules Intercalated in Laponite as Studied by ¹³C and ²⁹Si MAS NMR

²³Na 2D 3QMAS NMR and ²⁹Si, ²⁷Al MAS NMR investigation of Laponite and synthetic saponites of variable interlayer charge

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Interaction of a Zwitterionic Surfactant with Synthetic Clays in Aqueous Suspensions: A Multinuclear Magnetic Resonance Study

Cited by 9 publications

References 25 publications

Preparation and characterization of zwitterionic surfactant-modified montmorillonites

Preparation and characterization of zwitterionic surfactant-modified montmorillonites

Surfactant Molecules Intercalated in Laponite as Studied by 13C and 29Si MAS NMR

23Na 2D 3QMAS NMR and 29Si, 27Al MAS NMR investigation of Laponite and synthetic saponites of variable interlayer charge

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Product

Resources

About

Surfactant Molecules Intercalated in Laponite as Studied by ¹³C and ²⁹Si MAS NMR

²³Na 2D 3QMAS NMR and ²⁹Si, ²⁷Al MAS NMR investigation of Laponite and synthetic saponites of variable interlayer charge