一种含氟烷基磷酸酯类氟碳表面活性剂的复配研究

Blending behavior of a monofluoroalkyl phosphate surfactant

摘要:

研究了含氟烷基磷酸单酯类表面活性剂[分子式为H(CF2)6CH2OPO(ONa)2，记为DFH-PS]与无机盐和普通碳氢表面活性剂的复配性能，研究结果表明：DFH-PS水溶液最低表面张力为23.73 mN/m；当NaCl浓度为0.2 mol/L时可使DFH-PS水溶液最低表面张力下降到21.62mN/m；阴离子碳氢表面活性剂十二烷基硫酸钠(SDS)对该含氟表面活性剂影响显著，当DFH-PS与SDS摩尔比为5:1时，可使水溶液表面张力在很低浓度时降至22.22 mN/m；与非离子表面活性剂辛基酚聚氧乙烯(10)醚(OP-10)混合，当DFH-PS与OP-10摩尔比为8:1时，可使水溶液表面张力降至27.0 mN/m。

Abstract:

The blending behavior of a monofluoroalkyl phosphate surfactant [H(CF2)6CH2OPO(ONa)2, DFH-PS] against inorganic salt and general hydrocarbon base surfactant was investigated through the measurements of surface tension. The research result shows that the surface tension at critical micelle concentration (cmc) of DFH-PS, γcmc, is 23.73 mN/m. Electrolyte, such as NaCl, can decrease the γcmc to 21.62 mN/m when the concentration of NaCl aqueous solution is 0.2 mol/L. Blending with anionic hydrocarbon based surfactant, sodium dodecyl sulfate (SDS) could reduce the γcmc to 22.22 mN/m when the molar ratio of DFH-PS to SDS is 5:1. Octyphenol polyoxyethylene ether (OP-10) can reduce the γcmc to 27.0 mN/m when the molar ratio of DFH-PS to OP-10 is 8:1.