2014
DOI: 10.1007/s11743-014-1645-7
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Rheological Properties of Quaternary Ammonium Gemini Surfactants in Aqueous Solution

Abstract: The rheological properties and time effect of a quaternary ammonium salt gemini surfactant Cn‐s‐Cn•2Br solution were measured. The rheological properties were markedly different at various concentrations of the surfactant C12‐2‐C12•2Br solutions. When the alkyl chain of Cn‐2‐Cn•2Br solution is 14 or 16, the rheological properties of the solution exhibit fluid dilatancy very similar to C12‐2‐C12•2Br solutions. However, when the length of the spacer is four or six, C12‐s‐C12•2Br solutions exhibit Newtonian fluid… Show more

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Cited by 6 publications
(1 citation statement)
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“…The rheological properties of these new gemini surfactants with the ester functional group significantly differ from the conventional quaternary ammonium gemini surfactants although the complete comparison is not possible as the latter group of surfactants demonstrates both Newtonian and non-Newtonian fluid behavior depending on the length of the hydrophobic alkyl chain and spacer. 48 The morpholinium gemini surfactant: [C12MOR(2Es)-C12MOR]2Br demonstrated lower viscosity compared to the other gemini surfactant solutions. This property may be attributed to the presence of additional heteroatom oxygen in the heterocyclic group in addition to the two-ester functionality that is present in all the surfactants.…”
Section: Cmc By a Fluorescence Methodsmentioning
confidence: 92%
“…The rheological properties of these new gemini surfactants with the ester functional group significantly differ from the conventional quaternary ammonium gemini surfactants although the complete comparison is not possible as the latter group of surfactants demonstrates both Newtonian and non-Newtonian fluid behavior depending on the length of the hydrophobic alkyl chain and spacer. 48 The morpholinium gemini surfactant: [C12MOR(2Es)-C12MOR]2Br demonstrated lower viscosity compared to the other gemini surfactant solutions. This property may be attributed to the presence of additional heteroatom oxygen in the heterocyclic group in addition to the two-ester functionality that is present in all the surfactants.…”
Section: Cmc By a Fluorescence Methodsmentioning
confidence: 92%