色谱2013，Vol.31Issue(2)：147-150,4.DOI:10.3724/SP.J.1123.2012.10006
反相气相色谱法表征1-烯丙基-3-甲基氯代咪唑离子液体的表面性质
Characterization of surface properties of 1-allyl-3-methylimidazolium chloride ionic liquid by inverse gas chromatography
摘要
Abstract
The determination of the dispersive component of surface free energies (γds) at different temperatures and Lewis acid-base parameters of 1-allyl-3-methylimidazolium chloride ionic liquid ([AMIM]C1) were investigated by means of inverse gas chromatography (IGC). Four n-alkanes, including n-hexane (C6), n-heptane (C7), re-octane (C8) and n.-nonane (C9), were chosen as the apolar probes to characterize the dispersive component of the surface free energies at 343. 15, 353.15, 363.15 and 373.15 K, respectively; and dichloromethane (DCM), trichlo-romethane (TCM), tetrahydrofuran (THF), ethyl acetate (EtAc), acetone (Acet) as the polar probes to estimate the Lewis acid-base parameters to judge the interactions between [ AMIM ] Cl and the solvents. The IGC characterizations encompassed the adsorption thermodynamic parameters to acid-base surface interactions, including the standard enthalpy (△Hsa) and the free energy change of adsorption (△Gsa) at different temperatures. The results showed that the Lewis acid parameter Ka of [ AMIM] Cl was 0.34, and the base parameter Kb was 1.68, which indicated it was Lewis amphoteric with predominantly basic character. Furthermore, the free energy of adsorption △Gsa was also figured out. It was found that the γds of the [ AMIM ] Cl were 52. 26, 50. 82, 46.08 and 42.05 mJ/m2 at 343.15, 353.15, 363.15 and 373.15 K, respectively. The results are of great importance to the study of the surface properties and the application of ionic liquid.关键词
反相气相色谱/1-烯丙基-3-甲基氯代咪唑/离子液体/表面性质/表面色散自由能/Lewis酸碱参数Key words
inverse gas chromatography (IGC)/ 1-allyl-3-methylimidazolium chloride/ ionic liquid/ surface properties/ dispersive component of surface free energy/ Lewis acid-base parameters分类
化学化工引用本文复制引用
陈亚丽,王强,邓丽霜,张正方,唐军..反相气相色谱法表征1-烯丙基-3-甲基氯代咪唑离子液体的表面性质[J].色谱,2013,31(2):147-150,4.基金项目
新疆大学石油天然气精细化工重点实验室开放课题基金项目(XJDX0908-2010-05). （XJDX0908-2010-05）
