壬基酚聚氧乙烯醚丙基磺酸钠的表面活性及应用性能

研究了硬水和油田水中壬基酚聚氧乙烯醚丙基磺酸钠(NPSO-5)水溶液的表面活性及应用性能,并与常用表面活性剂LAS、AOS和AES进行比较;考察了添加脂肪醇对NPSO-5体系泡沫性能的影响和NPSO-5在NaOH水溶液中的润湿性能及硬水溶液中的润湿乳化性能。结果表明,水硬度从0 mmol/L增加到80 mmol/L,NPSO-5的临界胶束浓度(CMC)从2.06×10-4 mol/L降低到7.8×10-5 mol/L;NPSO-5相对于LAS和AOS具有较强的抗硬水能力,且在硬水中具有较高的起泡能力和稳泡性能,添加脂肪醇在一定程度上改变了液膜吸附层的结构,进一步提高了体系的泡沫性能;在NaOH质量分数达12%时,NPSO-5仍然具有良好的润湿性能。

Application and Surface Properties of Sodium Nonylphenol Polyoxyethylenated Propyl Sulfonate

The surface activity of sodium nonylphenol polyoxyethylenated propyl sulfonate(NPSO-5) and its application performance were determined to elucidate the relationship between its application/surface properties in hard water and those in oilfield water.Then,it was compared with such conventional surfactants as LAS,AOS and AES.The effects of some additives,butyl alcohol and dodecanol on the foaming properties were studied.The wettability and emulsifiability of NPSO-5 in hard water and the wettability in NaOH(aq) were also studied.The results show that the foaming properties were better in hard water,and the additives enhanced the foaming properties to some extent by changing the structure of the foam film.Compared with LAS and AOS,NPSO-5 had a strong resistance to hard water.The critical micelle concentration(CMC) decreased in the hardness of water.NPSO-5 surfactant still had excellent wettability and emulsifiability in NaOH(aq) and hard water.