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Acta Chimica Sinica >

2012 , Vol. 70 >Issue 14: 1551 - 1554

DOI: https://doi.org/10.6023/A1202012

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Shear Banding Transition of Wormlike Micelles Formed by a C22-Tailed Cationic Surfactant

  • Chu Zonglin ,
  • Zhang Yongmin ,
  • Han Yugui ,
  • Wang Hongyan ,
  • Li Bin ,
  • Feng Yujun
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  • a EOR Laboratory of Geological Scientific Research Institute, Shengli Oilfield Company of SINOPEC, Dongying 257015;
    b Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041;
    c Graduate University of the Chinese Academy of Sciences, Beijing 100049

Received date: 2012-02-01

  Online published: 2012-05-16

Supported by

Project supported by the Shandong Provincial Government through its ‘‘Taishan Scholar’’ project, the Natural Science Foundation of China (No. 21173207), and Science and Technology Department of Sichuan Province through its “Sichuan Distinguished Youth Fund” (No. 2010JQ0029) and “Sichuan Pillar Program from Science and Technology” (No. 2012NZ0006).

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Abstract

Both fundamental and technological research interests highlighted in the past few decades on surfactant self-assembly wormlike micellar aggregates. We report herein the shear-banding transition of wormlike micelles formed by a novel C22-tailed cationic surfactant, N-erucylamidopropyl-N,N,N-trimethylammonium iodide (EDAI) in aqueous solution. Steady and dynamic rheological measurements indicate that concentrated EDAI solution is strongly viscoelastic, which can be attributed to the presence of wormlike micelles in the solution. Rheological tests implies that the concentrated EDAI worm solution shows typical characteristic of shear banding transition, i.e., the flow curve is composed of two branches corresponding to high and low viscosities separated by a stress plateau between two critical shear rates. In the shear banding transition region, the fluid is mechanically unstable and the initial homogeneous flow was spurted into two macroscopic layers bearing different shear rates and stacked along the velocity gradient direction. The shear-banding transition behavior was further directly observed on a visualization rheometer.

Key words： long-chain surfactant; wormlike micelles; shear banding; rheological properties; viscoelasticity

Cite this article

Chu Zonglin , Zhang Yongmin , Han Yugui , Wang Hongyan , Li Bin , Feng Yujun . Shear Banding Transition of Wormlike Micelles Formed by a C22-Tailed Cationic Surfactant[J]. Acta Chimica Sinica, 2012 , 70(14) : 1551 -1554 . DOI: 10.6023/A1202012

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