| 引用本文: | 刘海燕,顾大明,刘国宇,杨刚,赵秀丽,陈成,李睿,徐克明.枝状Gemini咪唑表面活性剂的合成、表征及性能[J].哈尔滨工业大学学报,2012,44(12):84.DOI:10.11918/j.issn.0367-6234.2012.12.015 |
| LIU Hai-yan,GU Da-ming,LIU Guo-yu,YANG Gang,ZHAO Xiu-li,CHEN Cheng,LI Rui,XU Ke-ming.The synthesis, characterization and properties of branched Gemini imidazolium surfactants[J].Journal of Harbin Institute of Technology,2012,44(12):84.DOI:10.11918/j.issn.0367-6234.2012.12.015 |
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| 枝状Gemini咪唑表面活性剂的合成、表征及性能 |
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刘海燕1,2, 顾大明1, 刘国宇1, 杨刚3, 赵秀丽2, 陈成2, 李睿2, 徐克明2
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(1. 哈尔滨工业大学 理学院, 150001 哈尔滨; 2.大庆师范学院 化学化工学院, 163712 黑龙江 大庆;3.哈尔滨工业大学 机电工程学院, 150001 哈尔滨);1.哈尔滨工业大学 理学院, 150001 哈尔滨;2.大庆师范学院 化学化工学院, 163712 黑龙江 大庆;3.哈尔滨工业大学 机电工程学院, 150001 哈尔滨
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| 摘要: |
| 为研究枝状连接基对Gemini咪唑表面活性剂性能的影响,以2,2-双(溴甲基)-1,3-丙二醇为连接基合成枝状的Gemini咪唑表面活性剂2,4-二(溴化-3-烷基咪唑)-1,3-丙二醇(［Cn-P-Cn］Br2),其中n=0,2,14．通过表面张力法和电导法测量其表面活性并计算25 ℃时胶束形成的各项性能参数:临界胶束浓度(ccmc)、表面饱和吸附量(Γcmc)、表面活性剂分子在空气/水界面的最小横截面积(Amin)、效率因子(pC20)和表面压(πcmc)等．结果表明,不同链长的3种表面活性剂具有很高的表面活性,所有表面活性剂胶束形成的吉布斯自由能(ΔGm)均为负值,说明常温常压下胶束的形成是自发过程． |
| 关键词: Gemini咪唑表面活性剂 表面张力 电导法 胶束反离子结合度 胶束形成热力学 |
| DOI：10.11918/j.issn.0367-6234.2012.12.015 |
| 分类号:O647.2 |
| 基金项目:黑龙江省自然科学基金资助项目（QC08C33);黑龙江省教育厅科学技术研究项目（11553010）. |
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| The synthesis, characterization and properties of branched Gemini imidazolium surfactants |
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LIU Hai-yan1,2, GU Da-ming1, LIU Guo-yu1, YANG Gang3, ZHAO Xiu-li2, CHEN Cheng2, LI Rui2, XU Ke-ming2
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(1. School of Science, Harbin Institute of Technology, 150001 Harbin, China; 2. School of Chemistry and Chemical Engineering, Daqing Normal University, 163712 Daqing, Heilongjiang, China; 3.School of Mechanical and Electrial Engineering, Harbin Institute of Technology, 150001 Harbin, China);1.School of Science, Harbin Institute of Technology, 150001 Harbin, China ;2.School of Chemistry and Chemical Engineering, Daqing Normal University, 163712 Daqing, Heilongjiang, China ;3.School of Mechanical and Electrial Engineering, Harbin Institute of Technology, 150001 Harbin, China
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| Abstract: |
| To study the effect of branched spacer on the property of Gemini imidazolium surfactants, Gemini imidazolium surfactants of 2,4-［bis(3-alkylimidazolium-1-yl) bromide］-1,3-propanediol (［Cn-P-Cn］Br2, where n is the hydrocarbon chain length of 0,2 or 14) were synthesized with 2,2-dibromomethyl-1,3-propanediol as the spacer. Their surface activity and thermodynamic properties of micellization were characterized by surface tension and electrical conductivity measurements. The values of critical micelle concentration (ccmc), saturation adsorption values at the air/aqueous interface (Γmax), the area per surfactant molecule at the air/aqueous interface (Amin), the efficiency of adsorption (pC20) and surface pressure (πcmc) derived from surface tension measurement at 25 ℃ suggested that the surface activity of ［Cn-P-Cn］Br2 was high. While Gibbs Free Energy of micellization (ΔGm) of all the surfactants derived from electrical conductivity were all negative, indicating that the formation of micelles was spontaneous. |
| Key words: Gemini imidazolium surfactants surface tension electrical conductivity measurements degree of counterion binding to micelles thermodynamics of micelle formation |
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