| 摘要: |
| 本文用阳离子表面活性剂十八烷基三甲基溴化铵(STAB)作为主剂,水杨酸钠(NaSal)/碳酸钠(Na2CO3)、油酸钠(NaOA)作为助剂,制备蠕虫状胶束溶液,研究组分摩尔比及助剂种类对蠕虫状胶束流变特性的影响。结果表明,溶液总浓度为3.3%,STAB与助剂摩尔比R在2.2~2.6时,两个体系均形成了蠕虫状胶束。助剂为NaSal/Na2CO3,R=2.4时体系形成的胶束最长；助剂为NaOA,R=2.6时体系形成的胶束最长,数目最多。摩尔比相同时,STAB/NaOA溶液黏弹性更好。由溶液的实际模量所得Cole-Cole图在低频及中频时为半圆形,说明所制备的两种溶液均为符合麦克斯韦模型的黏弹性流体。 |
| 关键词: 表面活性剂,蠕虫状胶束,流变性,粘弹性 |
| DOI： |
| 分类号:O69 |
| 基金项目: |
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| The relationship between the composition of Worm-like Micellar and its Dynamic Viscoelasticity Properties |
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Fu Fan, Yan Yongli
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Xi'an Shiyou University
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| Abstract: |
| The wormlike micelles were prepared by mixing Octadecyltrimethyl Ammonium Bromide (STAB) as the main agent, sodium salicylate/Sodium Carbonate(NaSal/Na2CO3) or Sodium Oleate(NaOA) as additives, The influence of moral ratio(R) or the type of additives on the dynamic viscoelasticity of wormlike micelles were studied. When the total mass concentration is 3.3%, the molar ratio between 2.2 and 2.8, liquor both formed wormlike micelles.When the additives is NaSal/Na2CO3, molar ratio is 2.4, the system formed the longest micelles. When the additives is NaSal/Na2CO3, molar ratio is 2.4, the system formed the longest micelles is NaOA and the largest number. When they have the same molar ratio ,the STAB/NaOA’s dynamic viscoelasticity properties of the wormlike micelles are the best. The cole-cole plot from the actual modulus is a semmicircle in the low frequency and intermediate frequency, the wormlike micelles system fits the Maxwell’s mechanical model as viscoelastic fluid. |
| Key words: Surfactant, worm-like micelles, Static Rheological Properties, Dynamic Viscoelasticity Properties |
