石油化工高等学校学报

石油化工高等学校学报 ›› 2013, Vol. 26 ›› Issue (2): 12-16.DOI: 10.3969/j.issn.1006396X.2013.02.003

• 石油化工 • 上一篇    下一篇

离子液体(C14mimBr)在混合溶剂中胶束行为的研究

何怡,孙蕾,赵丹丹,韩春玉,刘春生,罗根祥*   

  1. (辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001)
  • 收稿日期:2012-11-26 出版日期:2013-04-25 发布日期:2013-04-25
  • 作者简介:何怡(1987灢),女,河北沧州市,在读硕士。
  • 基金资助:
    辽宁省科学技术厅项目资助(2009402004)。

A Conductometric Study of the Ionic Liquid Surfactant(C14mimBr) in Binary Mixtures

  1. (School of Chemistry and Materials Science, Liaoning Shihua University,Fushun Liaoning 113001, China)
  • Received:2012-11-26 Published:2013-04-25 Online:2013-04-25

摘要: 暋利用电导法研究了离子液体表面活性剂溴代灢1灢十四烷基灢3灢甲基咪唑在混合溶剂以及不同温度下的胶团化行为。通过电导率数据计算了临界胶束浓度(CMC)和反离子缔合度(g)。应用相平衡模型估算了表面活性剂胶团形成的热力学参数。标准摩尔吉布斯自由能(殼G熯m )总是负值,表明了胶团化行为的自发性,而且与温度无关。当乙二醇(EG)体积分数在10%、15%的时候,胶团形成是焓灢熵补偿效应,相反在乙二醇体积分数20%的时候胶团化行为是焓驱动的。

关键词: 离子液体 , 胶团化 , 临界胶束浓度 , 乙二醇灢水混合溶剂 , 热力学参数

Abstract: Micellar properties of ionic liquid surfactant, 1tetradecyl3methylimidazolium bromide (C14mimBr) were investigated by means of electrical conductometry with emphasis on the influence of cosolventwater content and temperature. The critical micelle concentration (CMC) and the degree of counterion association (g) were calculated from the electrical data. The thermodynamic parameters applied an equilibrium model for micelle formation were obtained. It turned out that the standard Gibbs energies of micellization (ΔGm) was always negative indicating the spontaneity of micelle formation, but it is roughly independent of temperature. In EGpoor mixtures, the micelle formation is affected by entropyenthalpy compensation, whereas it is driven by enthalpy in EGrich mixtures.

Key words: Ionic liquid,    ,  Micellization,    , Critical micelle concentration,    ,  EGwater mixed solvent,   , Thermodynamic parameters

引用本文

何怡,孙蕾,赵丹丹,韩春玉,刘春生,罗根祥. 离子液体(C14mimBr)在混合溶剂中胶束行为的研究[J]. 石油化工高等学校学报, 2013, 26(2): 12-16.

HE Yi, SUN Lei, ZHAO Dandan, HAN Chunyu,et al. A Conductometric Study of the Ionic Liquid Surfactant(C14mimBr) in Binary Mixtures[J]. Journal of Petrochemical Universities, 2013, 26(2): 12-16.

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