物理化学学报 >> 2009, Vol. 25 >> Issue (12): 2409-2412.doi: 10.3866/PKU.WHXB20091204

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以全氟丁基为基础的具有高表面活性的氟表面活性剂

杨百勤, 陈凯, 邢航, 肖进新   

  1. 陕西科技大学化学与化工学院, 教育部轻化工助剂化学与技术重点实验室, 西安 710021; 北京氟乐邦表面活性剂技术研究所, 北京 100080
  • 收稿日期:2009-08-25 修回日期:2009-10-09 发布日期:2009-11-27
  • 通讯作者: 肖进新 E-mail:xiaojinxin@pku.edu.cn

Perfluorobutyl-Based Fluorinated Surfactant with High Surface Activity

YANG Bai-Qin, CHEN Kai, XING Hang, XIAO Jin-Xin   

  1. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China; Beijing FLUOBON Surfactant Institute, Beijing 100080, P. R. China
  • Received:2009-08-25 Revised:2009-10-09 Published:2009-11-27
  • Contact: XIAO Jin-Xin E-mail:xiaojinxin@pku.edu.cn

摘要:

氟表面活性剂的环境和生物降解问题是最近的热点, 特别是全氟长链(≥C8)氟表面活性剂的应用限制乃至禁用已成为必然趋势. 本文合成了一种以短链的全氟丁基为基础的阳离子氟表面活性剂, N-[3-(二甲基胺基)丙基]全氟丁基磺酰胺盐酸盐(C4F9SO2NH(CH2)3NH(CH3)+2Cl-, 简称为PFB-MC). 该表面活性剂适用于强酸性环境, 具有极高的表面活性, 其溶液最低表面张力(19.80 mN·m-1)和通常的氟表面活性剂相当. 通过表面张力方法得到了固定pH(pH=2.6-2.7)情况下PFB-MC的表面张力-浓度对数(γ-lgc)曲线, 以及该pH下外加盐([NaCl]=0.1 mol·L-1)对表面张力的影响; 并进一步研究了pH对PFB-MC在其临界胶束浓度(cmc)前后的表面张力的影响.

关键词: 氟表面活性剂, 表面张力, 环境保护, 酸性条件, 盐效应

Abstract:

The environmentally friendliness and biodegradability of fluorinated surfactants are increasingly important and the use of long-chain (≥C8) perfluorinated surfactants will be evidently forbidden in future. In this work, a cationic fluorinated surfactant, N-[3-(dimethylamino)propyl] butanesulfonamide monohydrochloride (C4F9SO2NH(CH2)3-NH(CH3)+2Cl-, abbr. PFB-MC) based on a short fluorocarbon chain, perfluorobutyl, was synthesized. This surfactant was effective in acidic environments. It shows very high surface activity and its lowest surface tension (19.80 mN·m-1) in aqueous solution can be compared with the common fluorinated surfactants. The surface tension-logarithm of concentration (γ-lgc) curve of PFB-MC at a constant pH (pH=2.6-2.7) and the effect of salt addition on surface tension ([NaCl]=0.1 mol·L-1) at this pH were obtained by surface tension measurement. The effect of pH on the surface tension of these PFB-MC solutions below and above critical micelle concentration (cmc) was also studied.

Key words: Fluorinated surfactant, Surface tension, Environment protection, Acidic condition, Salt effect

MSC2000: 

  • O647.2