吡啶硝酸盐与醇二元混合体系物化性能研究
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(1.河北科技大学化学与制药工程学院,河北石家庄 050018;2.唐山职业技术学院临床医学部,河北唐山 063000)

作者简介:

王建英(1973- ),女,河北灵寿人,副教授,博士,主要从事离子液体方面的研究

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基金项目:

国家自然科学基金资助项目(20776037);河北省自然科学基金资助项目(B2012208084)


Physical and chemical properties of binary mixture of N-butylpyridinium nitrate and alcohol
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(1.College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang Hebei 050018, China;2.Clinical Medicine Department, Tangshan Vocational and Technical College, Tangshan Hebei 063000, China)

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    摘要:

    采用MDY-2电子密度仪和德国DCAT21全自动表面张力仪,在298.15K下测定了离子液体N-丁基吡啶硝酸盐(N-butylpyridinium nitrate,NO3)与有机溶剂甲醇、乙醇、正丁醇在全浓度范围内(离子液体在有机溶剂中的摩尔分数为0~1)的密度和表面张力,计算了二元体系{NO3+ CH3OH},{NO3+C2H5OH}和{NO3+C4H9OH}的超额摩尔体积VE和表面张力偏差δγ,分别利用Redlich-Kister方程对二元体系的超额摩尔体积VE和表面张力偏差δγ进行了拟合。结果表明:二元体系{NO3+CH3OH}和{NO3+C2H5OH}的超额摩尔体积VE在全摩尔组成范围内均为负值,而{NO3+C4H9OH}二元体系在低离子液体摩尔分数时为正值,随着离子液体摩尔分数的增大由正值变为负值。在全摩尔组成范围内,{NO3+CH3OH}的表面张力偏差δγ为正值,{NO3+C2H5OH}和{NO3+C4H9OH}的δγ为负值,随着醇碳链的增长,表面张力偏差出现由正到负的变化趋势。

    Abstract:

    In this paper, MDY-2electronic densitometer and Germany DCAT21automatic surface tension meter are used to measure the density and surface tension over the whole concentration range (the molar fraction of ionic liquids in oganic solvents is 0~1) for the binary mixtures of ionic liquids N-butylpyridinium nitrate (NO3) and organic solvents such as methanol,ethanol and butanol at the temperature of 298.15K. The excess molar volumes VE and the surface tension deviations δγ of binary mixtures {NO3+CH3OH},{NO3+C2H5OH} and {NO3+C4H9OH} are determined. VE and δγ are fitted by using the Redlich-Kister equation. The results show that the excess molar volumes of binary mixtures of {NO3+CH3OH} and {NO3+C2H5OH} are negative over the whole composition range, while the VE of binary mixture {NO3+C4H9OH} has positive values at low molar fraction of ionic liquid, passing through a maximum and then decreases and becomes negative, showing minimum at higher ionic liquid molar fraction. The surface tension deviations δγ of 收稿日期:2012-05-04;修回日期:2012-09-05;责任编辑:张士莹 基金项目:国家自然科学基金资助项目(20776037);河北省自然科学基金资助项目(B2012208084) 作者简介:王建英(1973- ),女,河北灵寿人,副教授,博士,主要从事离子液体方面的研究。 通讯作者:胡永琪教授。E-mail:huyq@hebust.edu.cn {NO3+CH3OH} systems are positive, but those of {NO3+C2H5OH} and {NO3+C4H9OH} systems are negative over the entire molar fraction range. It seems that surface tension deviations δγ varys from positive to negative with the increase of alkyl chain length of alcohols.

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王建英,梁丽亚,昝昊搏,胡永琪.吡啶硝酸盐与醇二元混合体系物化性能研究[J].河北科技大学学报,2012,33(5):400-405

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  • 收稿日期:2012-05-04
  • 最后修改日期:2012-09-05
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  • 在线发布日期: 2013-08-29
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