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author:

Xie, Danhua (Xie, Danhua.) [1] | Zhao, Jianxi (Zhao, Jianxi.) [2] (Scholars:赵剑曦) | You, Yi (You, Yi.) [3] (Scholars:游毅)

Indexed by:

EI Scopus SCIE

Abstract:

The viscoelastic wormlike micellar solutions formed by the carboxylate gemini surfactant, O, O'-bis(sodium 2-dodecylcarboxylate)-p-dibenzenediol (referred to as C-12 phi C-2(12)), have been investigated by steady-state and dynamic frequency-sweep rheological techniques. Another system using its homologue, O, O'-bis(sodium 2-dodecylcarboxylate)-p-benzenediol (C-12 phi C(1)2), was also examined for comparison. Both C-12 phi C-2(12) and C-12 phi C-12 formed wormlike micelles without any additives. The C* corresponding to the onset of the semi-dilute regime was 48 mmol L-1 for C-12 phi C-2(12) and 160 mmol L-1 for C-12 phi C-12, respectively, showing the considerably high ability and efficiency of C-12 phi C-2(12) in forming wormlike micelles. The wormlike micelles started to entangle with each other at 60 mmol L-1 for C-12 phi C-2(12) and 300 mmol L-1 for C-12 phi C-12. The average length of the C-12 phi C-2(12) wormlike micelles was estimated to be about 1.0-1.9 mu m, significantly longer than the C-12 phi C-12 ones. The solution viscosity of C-12 phi C-2(12) at 200 mmol L-1 reached 613 Pa s, much higher than 24.2 Pa s for C-12 phi C-12 at 500 mmol L-1. The mechanisms of forming wormlike micelles in both cases were revealed by dynamic light scattering measurements. Differently from the normal micellar growth that C-12 phi C-12 displayed, C-12 phi C-2(12) was found to form large network-like aggregates at very low concentrations. These aggregates could more conveniently transform into threadlike (wormlike) micelles by continuously increasing the concentration of C-12 phi C-2(12), from which a new approach was realised for highly viscoelastic anionic wormlike micellar solutions.

Keyword:

Community:

  • [ 1 ] [Xie, Danhua]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Zhao, Jianxi]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [You, Yi]Fuzhou Univ, Inst Colloid & Interface Chem, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China

Reprint 's Address:

  • 赵剑曦

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

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Source :

SOFT MATTER

ISSN: 1744-683X

Year: 2013

Issue: 28

Volume: 9

Page: 6532-6539

4 . 1 5 1

JCR@2013

2 . 9 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 24

SCOPUS Cited Count: 26

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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