高等学校化学学报2013，Vol.34Issue(2)：401-407,7.DOI:10.7503/cjcu20120265
新型Gemini咪唑表面活性剂的合成及表面性能
Synthesis and Surface Properties of Novel Gemini Imidazolium Surfactants
摘要
Abstract
Gemini imidazolium surfactants 2,4-[bis(3-alkylimidazolium-l-yl)bromide]-l ,3-propanediol ( [Cn-P-Cnim]Br2, n =10, 12, 14) were synthesized with dibromoneopenty glycol as the spacer. The surfactants were characterized via 1H NMR spectra, IR spectra and elemental analysis, and the results prove that they are all the objective products. The surface activity and thermodynamic properties of micellization of the surfactants were characterized by surface tension and electrical conductivity measurements. The values of critical micelle concentration ( cmc) , γcmc, Γmax , Amin, pc20 and πcmc derived from surface tension measurement at 25℃ suggest that the surface activities of [Cn-P-Cnim]Br2 are high. While the thermodynamic parameters of micellization ( ΔGθm , ΔHθm, ΔSθm ) of all the surfactants derived from electrical conductivity indicate that the formation of micelles is spontaneous and the micellization of [ Cn-P-Cnim]Br2 is entropy-driven.关键词
Gemini咪唑表面活性剂/表面张力/电导法/临界胶束浓度/胶束形成热力学参数Key words
Gemini imidazolium surfactant/ Surface tension/ Electrical conductivity measurement/ Critical micelle concentration (cmc) / Thermodynamic parameter of micelle formation分类
化学化工引用本文复制引用
刘海燕,顾大明,刘国宇,赵秀丽,陈成,徐克明..新型Gemini咪唑表面活性剂的合成及表面性能[J].高等学校化学学报,2013,34(2):401-407,7.基金项目
黑龙江省自然科学基金(批准号:QC08C33)和黑龙江省教育厅科学技术研究项目(批准号:11553010)资助. （批准号:QC08C33）
