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)2+Cl-,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(19.80mN·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]=0.1mol·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.
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）2^＋Cl^-, 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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2009年第12期2409-2412,共4页
Acta Physico-Chimica Sinica
基金
陕西省教育厅基金(09JK364)资助项目~~
关键词
氟表面活性剂
表面张力
环境保护
酸性条件
盐效应
Fluorinated surfactant
Surface tension
Environment protection
Acidic condition
Salt effect
