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author:

Deng, Sheng-lu (Deng, Sheng-lu.) [1] | Zhao, Jian-xi (Zhao, Jian-xi.) [2] (Scholars:赵剑曦) | Wen, Zhi-xiu (Wen, Zhi-xiu.) [3]

Indexed by:

EI Scopus SCIE

Abstract:

The quaternary ammonium gemini surfactants 12-s-12 (s= 2, 6, and 10) can produce homogeneous cyclohexane solutions with the assistance of salts, sodium benzoate (NaBez), sodium salicylate (NaSal), or sodium 2-bromoethanesulphonate (NaBres). In these samples, 12-s-12/salt formed aggregates and their structures were assigned by SAXS measurements together with POM observations. Among the three salts, both NaBez and NaBres had similar effects on assisting aggregate formation, but NaSal favoured the generation of aggregates of 12-s-12 with lower interface curvature. For example, both 12-2-12/NaBez and 12-2-12/NaBres formed an I-2 liquid crystalline (LC) phase with an Fm3m structure, but 12-2-12/NaSal generated a H-2 LC phase. Both 12-6-12/NaBez and 12-6-12/NaBres generated a H-2 LC phase, while 12-6-12/NaSal yielded both H-2 and V-2 phases with Pn3m symmetry, both of which co-existed in solution. The special effect of NaSal was attributed to its ortho-hydroxyl in the benzene ring. This favoured the formation of intermolecular hydrogen bonds among the NaSal molecules attracted to the quaternary ammonium head of 12-s-12. The water molecules joined between the NaSal molecules to build hydrogen-bonding bridges, which further increased the size of the 12-s-12 head. This benefited the formation of aggregates with lower surface curvature. In the systems of both NaBez and NaBres, the spacer length of the gemini surfactants dominated the morphology of the formed aggregates, wherein the effect of the salt was significantly weaker. Finally, the visco-elasticity of samples with similar aggregates was measured and the rheological behaviour discussed.

Keyword:

Community:

  • [ 1 ] [Deng, Sheng-lu]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Zhao, Jian-xi]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Wen, Zhi-xiu]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China

Reprint 's Address:

  • 赵剑曦

    [Zhao, Jian-xi]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China

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RSC ADVANCES

ISSN: 2046-2069

Year: 2018

Issue: 34

Volume: 8

Page: 18880-18888

3 . 0 4 9

JCR@2018

3 . 9 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

ESI HC Threshold:209

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count: 4

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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