2-丙烯酰胺基辛烷基磺酸钠的合成及其胶束化行为研究

以丙烯腈与1-辛烯为主要原料,合成了表面活性单体2-丙烯酰胺基辛烷基磺酸钠(NaAMC8S)。在n(1-辛烯)∶n(丙烯腈)∶n(发烟硫酸)=1∶6∶1,反应温度25℃,反应时间24h,产品收率(按1-辛烯计)为82.2%。用红外光谱、核磁共振波谱、高分辨质谱和X射线能谱确认了NaAMC8S的化学结构。用电导法与表面张力法测定了NaAMC8S的临界胶束浓度(CMC)。用稳态荧光光谱法测定了CMC和胶束的微极性。结果表明,25℃时,用电导法和表面张力法测得NaAMC8S的CMC分别为44.75mmol/L和51.76mmol/L,对应的表面张力为50.61mN/m;且CMC随温度变化很小。

Synthesis of Sodium 2-Acrylamido-octyl Sulfonate and Research on Its Micellar Behavior

Sodium 2-acrylamido-octyl sulfonate(NaAMC8S) was synthesized by using acrylonitrile and 1-octene as main raw materials.The optimum technology conditions are n(1-octene):n(acrylonitrile):n(fuming sulfuric acid)=1:6:1,reaction temperature 25 ℃,reaction time 24 h,the yield 82.2%(by 1-octene dollars).The structure of NaAMC8S was characterized with FTIR,1HNMR,HRMS and EDS.The critical micelle concentrations at different temperatures were measured using methods of surface tension,conductivity and steady state fluorescence measurements,respectively.The experiment results show that the critical micelle concentration(CMC) of NaAMC8S is 44.75 mmol/L(by conductivity method) and 51.76 mmol/L(by the surface tension method) at 25 ℃,and the corresponding surface tension is 50.61 mN/m.Besides,the critical micelle concentrations of NaAMC8S do not change significantly with temperature.