CHINESE JOURNAL OF ENERGETIC MATERIALS
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双(咪唑)硼烷类自燃离子液体的合成、表征及性质
作者:
作者单位:

(1. 西安科技大学化学与化工学院, 陕西 西安 710054; 2. 中国科学院过程工程研究所, 北京 100190)

作者简介:

费腾(1990-),男,硕士,主要从事自燃离子液体的合成研究。e-mail: feiteng@ipe.ac.cn 通信联系人: 张延强(1975-),男,研究员,主要从事功能化离子液体和高氮化合物的研究。e-mail: yqzhang@ipe.ac.cn

通讯作者:

张延强(1975-),男,研究员,主要从事功能化离子液体和高氮化合物的研究。e-mail: yqzhang@ipe.ac.cn

基金项目:

国家自然科学基金资助(21376252,21406242)


Synthesis, Characterization and Properties of Bis(imidazole)dihydroboronium Hypergolic Ionic Liquids
Author:
Affiliation:

(1. School of Chemistry and Chemical Engineering, Xi′an University of Science and Technology, Xi′an 710054, China; 2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China)

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    摘要:

    以三甲胺硼烷为反应底物,通过两步法,合成了以不同烃基侧链咪唑硼烷为阳离子,二氰胺根和硝基氰胺根为阴离子的系列离子液体。采用1H和13C核磁、红外及高分辨质谱等表征方法,确认了所得离子液体的结构和组成,并测定计算了其性质。结果表明:所得离子液体的分解温度均高于150 ℃,密度为1.04~1.27 g·cm-3,比冲为173.8~202.1 s。随着咪唑阳离子烃基侧链的增长,相应离子液体的密度减小,生成焓增大。二氰胺类离子液体同相应的硝基氰胺类离子液体相比,具有更短的点火延迟时间。其中,双烯丙基咪唑硼烷二氰胺离子液体具有良好的综合性能(粘度69 mPa·s,分解温度180 ℃,生成焓753.6 kJ·mol-1,点火延迟时间18 ms,比冲176.7 s),有望作为一种绿色燃料应用于双组元液体自燃推进剂。

    Abstract:

    A series of bis(imidazole)dihydroboronium ionic liquids with dicyanamide and nitrocyanamide anions were prepared by two-step synthetic method using trimethylamine borane as reaction substrate. Their structures and compositions were confirmed by 1H NMR and 13C NMR, infrared and high resolution mass spectrometry, and properties were measured and calculated. The results show that resulting ionic liquids have good performances: decomposition temperature up to 150 ℃, densities from 1.04 to 1.27 g·cm-3 and specific impulses from 173.8 to 202.1 s. With the increase of hydrocarbon side chains in imidazolium cations, densities of ionic liquids decrease while heats of formation increase. The dicyanamide ionic liquids show shorter ignition delay times than the corresponding nitrocyanamide ionic liquids. Among the ionic liquids, bis(1-allyl-1H-imidazole-3-yl)dihydroboronium dicyanamide possesses good comprehensive properties such as viscosity 69 mPa·s, decomposition temperature 180 ℃, heat of formation 753.6 kJ·mol-1, ignition delay time 18 ms and specific impulse 176.7 s, therefore exhibiting application potential as the green fuel of hypergolic bipropellants.

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费腾,蔡会武,李志敏,等.双(咪唑)硼烷类自燃离子液体的合成、表征及性质[J].含能材料, 2015, 23(10):952-958. DOI:10.11943/j. issn.1006-9941.2015.10.007.
FEI Teng, CAI Hui-wu, LI Zhi-min, et al. Synthesis, Characterization and Properties of Bis(imidazole)dihydroboronium Hypergolic Ionic Liquids[J]. Chinese Journal of Energetic Materials, 2015, 23(10):952-958. DOI:10.11943/j. issn.1006-9941.2015.10.007.

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  • 收稿日期: 2015-02-06
  • 最后修改日期: 2015-03-05
  • 录用日期: 2015-03-23
  • 在线发布日期: 2015-09-01
  • 出版日期: 2015-09-10