| 1-烷基-3-甲基咪唑系列室温离子液体表面张力的研究 |
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| 引用本文： | 王建英,赵风云,刘玉敏,胡永琪.1-烷基-3-甲基咪唑系列室温离子液体表面张力的研究[J].化学学报,2007,65(15):1443-1448. |
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| 作者姓名： | 王建英 赵风云 刘玉敏 胡永琪 |
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| 作者单位： | 1. 北京化工大学化学工程学院,北京,100029;河北科技大学化学与制药工程学院,石家庄,050018
2. 河北科技大学化学与制药工程学院,石家庄,050018 |
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| 摘 要： | 合成了系列1-烷基-3-甲基咪唑四氟硼酸盐(C2～7mim]BF4)及六氟磷酸盐(C4～7mim]PF6)室温离子液体, 并通过核磁氢谱、红外光谱、质谱等手段对其进行了结构表征; 采用Wilhelmy白金板法, 在293～338 K范围内测定了离子液体的表面张力, 测试结果显示, 同类离子液体表面张力γ随温度的升高而线性下降, 同种离子液体的表面张力呈现出较宽的变化范围, 如293 K下, 表面张力值从C2mim]BF4的50.4 mJ/m2到C7mim]BF4的36.1 mJ/m2. 最后对离子液体的表面性能进行了讨论.
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| 关 键 词： | 离子液体 合成 表面张力 表面性能 |
| 收稿时间： | 2006-10-13 |
| 修稿时间： | 2006-10-132007-05-15 |
Study on Surface Tension of a Series of 1-Alkyl-3-methylimidazolium Room Temperature Ionic Liquids |
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| WANG Jian-Ying,ZHAO Feng-Yun,LIU Yu-Min,HU Yong-Qi.Study on Surface Tension of a Series of 1-Alkyl-3-methylimidazolium Room Temperature Ionic Liquids[J].Acta Chimica Sinica,2007,65(15):1443-1448. |
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| Authors: | WANG Jian-Ying ZHAO Feng-Yun LIU Yu-Min HU Yong-Qi |
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| Institution: | a College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029;b College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018 |
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| Abstract: | A series of room temperature ionic liquids based on 1-CnH2n＋1-3-methylimidazolium (Cnmim]) with two kinds of fluorinated anions (BF4－ and PF6－) (n＝2～7; 4～7, respectively) were synthesized, and the structures were characterized and confirmed by 1H NMR, IR and MS. Surface tensions were measured using a Wilhelmy plate apparatus over a wide tempera-ture range (293～338 K). The results show that there is a linear decrease of surface tension with increasing temperature. The values of surface tension span an unusually wide range for compounds of similar structure, from 50.4 mJ/m2 (C2mim]BF4) to 36.1 mJ/m2 (C7mim]BF4) at 298 K. Surface properties of the series of synthesized ionic liq-uids were also discussed. |
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| Keywords: | ionic liquid synthesis surface tension surface property |
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