Abstract:

Taking oleic acid as the raw material，a trimeric quaternary ammonium surfactant 18:1-2-18:1-2-18:1 with oleyl chains（cis-octadec-9-ene）and short spacers was synthesized with the assistance of microwaves. The surfactant shows a strong tendency of aggregation with the critical micelle concentration of 3.34 μmol/L. The micelle ionization degree is 0.26. The solution of 18:1-2-18:1-2-18:1 can be gelated at a surfactant concentration of 5.2%，showing a strong viscoelasticity.

摘要：

以油酸为主要原料，采用微波辅助的方法合成了具有顺式-9-十八烯链和短联接链的三聚季铵盐表面活性剂18:1-2-18:1-2-18:1。该表面活性剂具有极强的聚集能力，临界胶束浓度为3.34 μmol/L。胶束的离子解离度为0.26。18:1-2-18:1-2-18:1达到5.2%时即可使溶液凝胶化，表现出良好的黏弹性。