p-全氟壬烯氧基苯磺酸聚乙二醇酯表面活性剂的合成及表面活性

以p-全氟壬烯氧基苯磺酰氯(PFNPSC)和聚乙二醇(PEG-n)为原料,合成了p-全氟壬烯氧基苯磺酸聚乙二醇酯(PFNPS-PEG-n),用IR和19F NMR对产物结构进行了表征。考察了聚乙二醇平均相对分子质量和反应时间对反应的影响,测定了PFNPS-PEG-n水溶液的表面活性、泡沫性能和乳化性能。结果表明,以PEG-600为原料得到的PFNPS-PEG-n表面活性最高,其较优的合成工艺条件为:四氯化碳为溶剂,三乙胺为缚酸剂,n(PEG-600)∶n(PFNPSC)=1∶1,在40℃下反应6～8 h,产物PFNPS-PEG-600临界胶束浓度(CMC)为0.56 g/L,表面张力γCMC可达19.1 mN/m;20 mL 1 g/L PFNPS-PEG-600水溶液的泡沫体积95 mL,泡沫半衰期75 s。PFNPS-PEG-1000的乳化性能最佳。

Synthesis and Performance of Polyethylene Glycol p-Perfluorous Nonenyloxyphenyl Sulflonate Surfactant

Polyethylene glycol p-perfluorous nonenyloxyphenyl sulflonates(PFNPS-PEG-n) were synthesized from p-perfluorous nonenyloxyphenylsulfonyl chloride(PFNPSC) and polyethylene glycol(PEG-n),and were characterized by IR and 19F NMR,respectively.The effects of average relative molecular mass of PEG-n and reaction time on alcoholysis were investigated.The performances of these surfactants such as surface tensions,foaming characterisitics and emulsifiabilities were studied.The surface activity of PFNPS-PEG-n synthesized from PEG-600 is the best,and the optimal reaction conditions are n(PFNPSC)∶ n(PEG-600)=1∶ 1,reacts at 40 ℃ for 6～8 h in CCl4 in the present of NEt3.The critical micelle concentration(CMC) of PFNPS-PEG-600 is 0.56 g/L,and its γCMC is 19.1 mN/m;20 mL 1 g/L PFNPS-PEG-600 will produce 95 mL foam,and its half-life time is 75 s.Emulsifiability of PFNPS-PEG-1000 is the best among PFNPS-PEG-n.