期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 285, 期 -, 页码 697-706出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2019.04.101
关键词
Ionic liquid based nanofluids; Phase transition; Fragility; Ionic conductivity and diffusivity; Decoupling of charge transport
资金
- Council of Scientific and Industrial Research, India [03 (1327)/14/EMR-II]
The focus of the present work is the study of conductivity and structural relaxation dynamics of a series of ionanofluids, prepared by dispersing different extents of ionic liquid tethered SnO2 nanoparticles, i.e., nanoscale hybrid ionic fluid, (NHIF) in imidazolium ionic liquid host. Measurements have been made using temperature dependent dielectric spectroscopy and differential scanning calorimetry (DSC). Our study reveals that with increasing NHIF content in the host, the ion conductivity relaxation becomes increasingly faster than the structural relaxation at any measured temperature. For 20.0 wt% NHIF the structural relaxation time is longer than the conductivity relaxation times by more than six decades in the vicinity of the glass transition temperature (T-g), i.e. the decoupling index R-t(T-g) is >6. In contrast to the host ionic liquid, the observed unusual behaviour with increasing NHIF content is appropriately correlated to the corresponding depression of crystallinity and a sharp rise in fragility index in ionanofluids. The study suggests that the conjunction of ionic liquid tethered nano particles and ionic liquid provides a promising way to design highly conductive ionanofluids solvents with numerous application perspectives. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据