高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (10): 1618.

• 论文 • 上一篇    下一篇

C14BE与NaCMC之间的相互作用(Ⅰ)──NaCMC对C14BE表面活性的影响

李干佐, 隋卫平, 徐桂英, 郑立强   

  1. 山东大学胶体与界面化学研究所, 济南, 250100
  • 收稿日期:1994-12-15 修回日期:1995-03-27 出版日期:1995-10-24 发布日期:1995-10-24
  • 通讯作者: 涂桂英
  • 作者简介:李干佐,男,56岁,教授.
  • 基金资助:

    国家自然科学基金

The Interaction Between C14BE and NaCMC(Ⅰ) ──The Effect of NaCMC on the Surface Activity of C14BE

LI Gan-Zuo, SUI Wei-Ping, XU Gui-Ying, ZHENG Li-Qiang   

  1. Institute of Colloid and Interface Chemistry, shandong University, Jinan, 250100
  • Received:1994-12-15 Revised:1995-03-27 Online:1995-10-24 Published:1995-10-24

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摘要： 以表面张力法研究了NaCMC与C14BE之间的相互作用。结果表明:在纯水介质中,NaCMC对C14BE的表面活性影响较小,但NaCl的存在对C14BE与NaCMC间的缔合有促进作用,混合体系的σ～C曲线出现两个转折点。二者开始缔合的浓度小于cmc,完成缔合的浓度大于cmc.pH=2时,形成C14BE/H-CMC复合物,使C14BE的表面活性降低,σ～C曲线亦出现两个转折点。

关键词: 表面活性, 十四烷基甜菜碱, 羧甲基纤维素钠, 临界胶束浓度

Abstract: The interaction between C14BE and NaCMC has been studied by using the surface tension method.In the neutral water solution, the effect of NaCMC on the surface activity of C14BE is weak, but with the addition of NaCl, two transition points appeared on the surface tension-concentration curve.This indicated that a water soluble C14BE/NaCMC complex was formed by hydrophobic effect. In the solution of pH=2,the existence of two transition points also indicated the formation of C14BE/NaCMC complex because of hydrogen-binding.It is the advantage for zwitterionic surfactant that the effect of electrolyte on it is weaker compared with that of its ionic surfactant.

Key words: Surface activity, Tetradecyl betaine(C14BE), Sodium carboxymethyl cellulose (NaCMC), Critical micelle concentration(cmc).

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