辛基酚聚氧乙烯醚磺酸盐的合成与界面张力的测定

以辛基酚聚氧乙烯醚（OP-4）和氯化亚砜（SOCl2）为原料,经氯代和磺化合成了辛基酚聚氧乙烯醚磺酸盐（OPES-4）,利用高效液相色谱法和两相滴定分别对各步反应收率进行了测定,对合成条件进行了优化。结果表明,氯代反应以吡啶为催化剂在70℃下反应2h即可完成;磺化的最佳反应条件为：以亚硫酸钾为磺化剂,与氯代辛基酚聚氧乙烯醚物质的量比1.3∶1,在170℃下反应4h,收率可达82.6%。利用红外光谱仪和核磁共振波谱仪对产物结构进行了表征;同时考察了不同矿化度下OPES-4浓度和油水动态界面张力的关系,得到了OPES-4适用的最佳NaCl质量分数在16%～20%,界面张力最低可达1.5×10-2mN/m。

The Synthesis and Interfacial Tension Determination of Octylphenol Polyoxyrethvlene Ether Sulfonate

The OPES-4 was synthesized from octylphenol polyoxyethylated（OP-4）,thionyl chloride（SOCl2）by chlorination and sulfonation,using HPLC and two-phase titration to measure the yield of each step,and optimized the synthesis conditions.The experiment results show that the optimum chlorinated reaction lasted 2 hours at 70 ℃,with pyridine as catalyst,and the yield of sulfonation reached 82.6% at the optimum reaction conditions：potassium sulfite/polyethoxy-chloride（molar ratio）1.3∶1,reaction temperature 170 ℃,and reaction time 4 h.The chemical structures of the OP-4 and OPES-4 were characterized by IR and 1H-NMR respectively.The dynamic interfacial tension of OPES-4 in different salinities was measured,indicating that the lowest value is 1.5×10-2 mN/m,at the optimum salinity range 16%~20% NaCl.