物理化学学报 >> 2006, Vol. 22 >> Issue (11): 1325-1330.doi: 10.3866/PKU.WHXB20061105

研究论文 上一篇    下一篇

1-萘胺探针研究Gemini表面活性剂的胶团性质

刘金彦;赵剑曦;何芸菁   

  1. 福州大学化学化工学院应用化学系, 福州 350002
  • 收稿日期:2006-04-17 修回日期:1900-01-01 发布日期:2006-11-06
  • 通讯作者: 赵剑曦 E-mail:jxzhao.colloid@fzu.edu.cn

Micellar Properties of Gemini Surfactants Studied by 1-Naphthylamine Probe

LIU Jin-Yan;ZHAO Jian-Xi;HE Yun-Jing   

  1. Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, P. R. China
  • Received:2006-04-17 Revised:1900-01-01 Published:2006-11-06
  • Contact: ZHAO Jian-Xi E-mail:jxzhao.colloid@fzu.edu.cn

摘要: 1-萘胺是一种具有分子内电荷转移特征的探针。利用它的荧光特征波长对环境极性的敏感性,其 logC曲线出现了2个浓度相距较大的转折点,第一个转折点对应临界胶团浓度cmc,第二个转折点Ccm则表征胶团结构达到较为密实的临界点。实验发现,Gemini表面活性剂在cmc时仅生成聚集数N较小的聚集体,在浓度从cmc增大至Ccm的区间内,N急剧增大。

关键词: Gemini表面活性剂, 1-萘胺探针, 胶团长大, 临近cmc区域

Abstract: 1-naphthylamine is a probe with intra-molecular charge transfer in nature. Its characteristic band ( ) is sensitive to the polarity of environment. It was found that the semilogarithmic plot of versus surfactant concentration C appeared the two inflection points. The first inflection point corresponded to the critical micelle concentration (cmc), and the second inflection point (Ccm) addressed the critical point reaching dense structure in the micellar core. The results showed that gemini surfactant only form small aggregates at the cmc. Over the range of cmc to Ccm, the aggregation number of the micelle rapidly increases with increasing C.

Key words: Gemini surfactant, 1-naphthylamine probe, Micelle growth, The concentration close to the cmc.