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以溴代正烷烃、乙二胺、1,3-丙磺内酯合成了一系列新型磺酸盐型Gemini表面活性剂(SGS-8、SGS-10、SGS-12、SGS-14);采用IR、1H NMR及元素分析等手段对合成产物进行结构表征,并研究了其表面活性,采用等温滴定微量热技术、表面张力法和稳态荧光光谱法研究了SGS-12与聚丙烯酰胺(PAM)的相互作用规律及热力学参数。结果表明,合成的产物纯度较高,具有较低的cmc值和较好的表面活性;SGS-12/PAM混合体系的表面张力曲线和芘探针在体系中微极性的变化表明,二者发生相互作用且形成混合胶束;SGS-12与PAM结合是一个由焓驱动的自发过程,△H和△S均小于0,表明相互作用力以氢键和范德华力为主,合成产物在聚丙烯酰胺分子上的平均结合数为287。
A series of novel sulfonate Gemini surfactants (SGS-8, SGS-10, SGS-12 and SGS-14) were synthesized from bromo-n-alkane, ethylenediamine and 1,3-propane sultone. IR, 1H NMR and elemental analysis were used to characterize the structure of the synthesized product. The surface activity of the synthesized product was studied. The isothermal titration calorimetry, surface tension method and steady-state fluorescence spectroscopy were used to study the interaction between SGS-12 and polyacrylamide ) Laws of interaction and thermodynamic parameters. The results show that the synthesized product has high purity, low cmc value and good surface activity. The surface tension curve of SGS-12 / PAM hybrid system and the change of micropolarity of pyrene probe in the system indicate that both Interaction and formation of mixed micelles SGS-12 and PAM is a spontaneous enthalpy-driven process, △ H and △ S are less than 0, indicating that the interaction between hydrogen bonds and van der Waals forces, the synthesis of poly The average number of conjugates on the acrylamide molecule was 287.