摘要
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。
The series of sulfonate Gemini surfactants (SGSs) were synthesized from bromo-alkane, ethylenediamine and 1,3-propanesulfonate. Their chemical structures were confirmed by IR, I H NMR and elemental analysis. The interaction and thermodynamic parameters of SGS-12 with polyacrylamide (PAM) were studied by isothermal titration microcalorimetry (ITC) , surface tension and steady-state fluorescence spectrometry. The results showed that the synthesiged-SGSs have higher surface activity with lower cmc values and surface tensions. The mixed micelle was formed through mixing of SGS-12 and PAM, and the combination of them was a spontaneous process droved by enthalpy, △ H 〈 0 and △ S 〈 0 indicated that the main interaction between them were hydrogen bonds and Van der Waals forces. The average binding number of SGSs on the PAM molecule was 287.
出处
《化学通报》
CAS
CSCD
北大核心
2013年第11期1034-1039,共6页
Chemistry
基金
中国石油科技创新基金项目(2011D-5006-0211)
湖北省自然科学基金创新群体项目(2010CDA097)
湖北省高等学校优秀中青年创新团队计划项目(T201003)资助