高抗盐羟基磺基甜菜碱型表面活性剂的合成与性能

发布时间：2018-04-16 15:22

  本文选题：甜菜碱 + 表面活性剂　； 参考：《油田化学》2017年02期

【摘要】：针对常规表面活性剂在化学驱和压裂中不抗盐的问题,以十四醇、环氧氯丙烷、N,N-二甲基乙醇胺和2-羟基-3-氯丙磺酸钠等为原料,通过两步醚化法和一步季胺化法合成了一种高抗盐性羟基磺基甜菜碱型表面活性剂[N-(6-十四烷氧基-5-羟基)-丙氧基乙基-N-二甲基-N-(2-羟基)丙磺酸钠]氯化铵。用红外光谱仪对化合物的结构进行了表征,研究了表面活性剂水溶液的表面活性。结果表明,所合成的表面活性剂具有优良的表面活性,25℃下的临界胶束浓度(cCMC)为6.4×10~(-4)mol/L、临界胶束浓度下的表面张力(γCMC)为32.2 m N/m、降低表面张力效率(pC20)为3.38、饱和吸附量(Γmax)为2.80×10~(-6)mol/m~2、最小吸附面积(Amin)为0.17 nm~2/分子。该表面活性剂亲水基团受高矿化度的影响较小,抗盐性较好,在NaCl、CaCl_2和MgCl_2质量浓度分别为2.8×10~5、2.0×10~4和2.0×10~4mg/L的溶液中均未出现沉淀。
[Abstract]:In order to solve the problem of salt resistance of conventional surfactants in chemical flooding and fracturing, tetradecanol, epichlorohydrin, N-dimethylethanolamine and sodium 2-hydroxy-3-chloropropanesulfonate were used as raw materials.A highly salt-resistant hydroxyl sulfobetaine type surfactant [N-N _ 6- tetradecyl -5-hydroxyl -propyl ethyl -N-dimethyl-N-N--N--N-o-2-hydroxypropanesulfonate] ammonium chloride was synthesized by two-step etherification and one-step quaternary amination.The structure of the compound was characterized by infrared spectroscopy, and the surface activity of surfactant aqueous solution was studied.The results show thatThe synthesized surfactant has excellent surface activity. The critical micelle concentration (cCMCc) at 25 鈩，

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