中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (03): 318-322.DOI: 10.3724/SP.J.1095.2010.90186

• 研究论文 • 上一篇    下一篇

NaBr对杂双子表面活性剂CmOhpNC8水溶液吸附和聚集的影响

谢丹华,周天华,赵剑曦*   

  1. (福州大学化学化工学院应用化学系 福州 350002)
  • 收稿日期:2009-03-19 修回日期:2009-05-05 出版日期:2010-03-10 发布日期:2010-03-10
  • 通讯作者: 赵剑曦，男，教授; E-mail:jxzhao.colloid@fzu.edu.cn; 研究方向：胶体与界面化学
  • 基金资助:
    国家自然科学基金（20673021）和教育部高校博士学科点专项基金（20050386007）资助项目

Effects of NaBr on the Adsorption and Aggregation of Heterogemini Surfactant CmOhpNC8 in Aqueous Solution

XIE Dan-Hua, ZHOU Tian-Hua, ZHAO Jian-Xi*   

  1. (Department of Applied Chemistry,College of Chemistry and Chemical
    Engineering,Fuzhou University,Fuzhou 350002)
  • Received:2009-03-19 Revised:2009-05-05 Published:2010-03-10 Online:2010-03-10

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摘要：

以表面张力和荧光探针技术研究了NaBr对杂双子表面活性剂CmOhpNC8(m:10,14,16）水溶液性质的影响。 结果表明,NaBr强烈促进了CmOhpNC8在气/液界面上的吸附和在水相中的聚集，其中c20在cNaBr≥1×10 mmol/L时降到极低的微摩尔/升数量级，显示了相当高的降低水表面张力效率。 在NaBr促进下，水溶液中CmOhpNC8表现出强烈的预胶团化行为。 这些均是对应的2种单头基单烷烃链表面活性剂简单1∶1混合所无法实现的，显示了在头基处引入短联接链形成杂双子结构的表面活性优势以及对盐效应的敏感性。

关键词: 杂双子表面活性剂CmOhpNC8, NaBr, 水溶液表面张力效率, 预胶团化

Abstract:

The effects of NaBr on the properties of heterogemini surfactant CmOhpNC8(m:10, 14, 16) in aqueous solution were investigated by means of surface tension and fluorescence probe techniques. The results show that NaBr strongly promoted the adsorption and the aggregation of CmOhpNC8 at the air/water interface in aqueous bulk solution. The c20 was reduced to extremely low order of magnitude of micromole per liter at c(NaBr)≥10 mol/L, showing quite a high efficiency in surface tension reduction. Upon NaBr addition, CmOhpNC8 exhibited strong premicellization in aqueous bulk solution. So low c20 and evident premicellization could not be observed in the equal-mole mixture of the corresponding conventional surfactants, exhibiting the surface-active advantage as well as the salt-sensitivity of heterogemini-type surfactant, in which a short spacer was introduced to link the two different headgroups.

Key words: heterogemini surfactant CmOhpNC8, NaBr, aqueous solution surface tension, premicellization

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