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

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

研究论文

长链阳离子表面活性剂蠕虫状胶束的剪切带转变行为研究

  • 楚宗霖 ,
  • 张永民 ,
  • 韩玉贵 ,
  • 王红艳 ,
  • 李彬 ,
  • 冯玉军
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  • a 中国石化胜利油田地质科学研究院采收率室 东营 257015;
    b 中国科学院成都有机化学研究所 成都 610041;
    c 中国科学院研究生院 北京 100049

收稿日期: 2012-02-01

  网络出版日期: 2012-05-16

基金资助

项目受山东省“泰山学者”岗位建设;国家自然科学基金(No. 21173207);四川省杰出青年科学基金(No. 2010JQ0029);四川省科技支撑计划(No. 2012NZ0006)资助.

收起

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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摘要

报道一种含有不饱和疏水尾链的超长链阳离子表面活性剂——N-芥酸酰胺丙基-N,N,N-三甲基碘化铵(EDAI)自组装所形成的蠕虫状胶束及其剪切带行为. EDAI浓溶液表现出了明显的剪切带转变特征, 即溶液的流动曲线被介于两个临界剪切速率之间的剪切应力平台分割为粘度不同的两部分. 在剪切带转变区域, 原本均质的流体表现出机械剪切不稳定性, 沿速度梯度方向被分割为剪切速率不同的两个宏观流体层.

关键词： 长链表面活性剂; 蠕虫状胶束; 剪切带; 流变学性能; 粘弹性

本文引用格式

楚宗霖 , 张永民 , 韩玉贵 , 王红艳 , 李彬 , 冯玉军 . 长链阳离子表面活性剂蠕虫状胶束的剪切带转变行为研究[J]. 化学学报, 2012 , 70(14) : 1551 -1554 . DOI: 10.6023/A1202012

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

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