一种新颖的松香酰基甘氨酸型两性双子表面活性剂的合成及性能分析

Synthesis and characterization of a novel abietyl glycine amphoteric gemini surfactant

以酸值为170.54 mg(KOH)/g的松香酸为原料,经酰化、成盐等化学反应制备了以乙二胺为联结基的松香酰基甘氨酸型两性双子表面活性剂,采用傅里叶变换红外光谱仪确证目标产物的基本结构,通过表面张力仪等方法对产物进行性能分析,结果表明,双子表面活性剂的临界胶束浓度(CMC)为5×10-4mol/L,γCMC为34.208 mN/m;乳化时间为2.5 h,乳化力很强,可作为较优的乳化剂;由泡沫力分析可知产物的泡沫性能稳定,泡沫力强。

The designed compound, abietyl glycine amphoteric germini surfactant, is synthesized via successive acylamidation with glycine,then salification with ethylenediamine by using rosin of which the acid value is 170. 54 mg （KOH）/g as raw material. The structure of the designed compound is characterized by the FT-IR. Its property is analyzed by surface tension determine instrument. The results indicate that the critical micelle concentration（CMC） and the surface tension of the amphoteric germini surfactant is 5 ×10^-4 mol/L and 34. 208 mN/m,respectively. Furthermore, it is found that its emulsifying ability time（ up to 2. 5 hours） ,foaming ability and foam stabilization are satisfactory,which make it more promising for an excellent emulsifier.