Effect of water content on the physicochemical properties of PIL composed of 2-ethylhexylethylenediaminium cation and CF_3SO_3 anion
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摘要:
通过对合成的异辛基乙二胺-CF3SO3[简称HEtHex(TFS)]型质子化离子液体进行FT-IR红外谱图、13 C-NMR谱图测定及CHN元素分析,鉴定了其结构特征和纯度.在常压下相同的温度范围T=(303.15～353.15)K内,不同含水量(质量百分含量)(0.53%,4.78%,6.00%,6.92%,7.97%,10.05%,14.83%,25.54%及54.99%)的条件下,测定了HEtHex(TFS)的密度、黏度及电导率,并用Arrhenius方程分别拟合了HEtHex(TFS)的黏度和电导率与温度之间的关系.通过Walden规则描述了其摩尔电导率和流动性之间的关系,结果显示,温度和水分含量对于HEtHex(TFS)的密度、黏度及电导率有着较大的影响.HEtHex(TFS)在相同的温度范围内,不同含水量条件下,随着温度的升高,黏度呈现指数形式的下降趋势,电导率则呈现指数形式的升高趋势.
The purity of PIL composed of 2-ethylhexylethylenediaminium cation and CF3 SO3 anion [HEtHex(TFS)]was measured using FT-IR,13 C-NMR spectra and CHN elemental analysis.The effects of water at different mass concentration(0.53%,4.78%,6.00%,6.92%,7.97%,10.05%,14.83%,25.54%及54.99%)on the physicochemical properties such as density,viscosity and electrical conductivity of HEtHex(TFS)were studied in the temperature range of T=(303.15-353.15)K.Temperature dependence of viscosity and conductivity was discussed on the basis of the Arrhenius equation,respectively.The relationship between molar conductivity and fluidity was described by the Walden rule.The results show that the effects of temperature and water content on the density,dynamic viscosity and electrical conductivity of HEtHex(TFS)are significant.The viscosity decreases and the conductivity increases with increasing water contents and temperature.
作者:
李晨光 花儿
Li Chenguang;Hua Er(College of Chemistry and Chemical Engineering,State Ethnic Affairs Commission,North Minzu University,Yinchuan 750021,China;Key Laboratory of Chemical Engineering and Technology,State Ethnic Affairs Commission,North Minzu University,Yinchuan 750021,China)
机构地区:
北方民族大学化学与化学工程学院 北方民族大学国家民委化工技术基础重点实验室
出处:
《betway官方app 学报：自然科学版》 CAS 北大核心 2019年第2期61-66,共6页
基金:
宁夏高等学校科学研究项目(NGY2017164)
关键词:
质子化离子液体 水分含量 密度 黏度 电导率
Protic Ionic Liquid water content density viscosity conductivity
分类号:
O611 [理学—无机化学]
