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Issue 32, 2018
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Effects of additives on the viscoelastic responses of cationic gemini surfactant solutions

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Abstract

Several additives, including inorganic (NaCl) and organic salts (derivatives of benzoate), were added into aqueous solutions of a gemini cationic surfactant, 2-hydroxypropyl-1,3-bis (myristyldimethylammonium chloride) (abbreviated as 14-3(OH)-14(2Cl)). The mixed systems were investigated using rheological measurement, cryo-TEM and 1H NMR analysis. The results showed that addition of salts induced rich aggregate morphologies in the 14-3(OH)-14(2Cl)/salt systems. The influence of an inorganic salt on the viscoelasticity of 14-3(OH)-14(2Cl) solutions is much weaker than that of organic salts. Furthermore, the ability of three organic salts in enhancing the viscoelasticity of 14-3(OH)-14(2Cl) solutions is in the order sodium m-hydroxybenzoate > sodium o-hydroxybenzoate > sodium p-hydroxybenzoate. The different roles of these organic salt isomers arise from the different types of hydrogen bonding formed between 14-3(OH)-14(2Cl) and the organic counter ions.

Graphical abstract: Effects of additives on the viscoelastic responses of cationic gemini surfactant solutions

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Publication details

The article was received on 21 Jun 2018, accepted on 20 Jul 2018 and first published on 20 Jul 2018


Article type: Paper
DOI: 10.1039/C8SM01268G
Citation: Soft Matter, 2018,14, 6696-6707
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    Effects of additives on the viscoelastic responses of cationic gemini surfactant solutions

    X. Chen, Q. Liu, Y. Guo, H. Yan, J. Li, D. Lv, J. Zhang, M. Liu, C. Yao and X. Wei, Soft Matter, 2018, 14, 6696
    DOI: 10.1039/C8SM01268G

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