Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (12): 2409-2412.doi: 10.3866/PKU.WHXB20091204

• Communication • Previous Articles     Next Articles

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

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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